1818 lines
53 KiB
TypeScript
1818 lines
53 KiB
TypeScript
/*
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This file is part of GNU Taler
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(C) 2022 GNUnet e.V.
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GNU Taler is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
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*/
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/**
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* Imports.
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*/
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import {
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AbsoluteTime,
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ConfirmPeerPullDebitRequest,
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AcceptPeerPullPaymentResponse,
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ConfirmPeerPushCreditRequest,
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AcceptPeerPushPaymentResponse,
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AgeCommitmentProof,
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AmountJson,
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Amounts,
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AmountString,
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buildCodecForObject,
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PreparePeerPullDebitRequest,
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PreparePeerPullDebitResponse,
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PreparePeerPushCredit,
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PreparePeerPushCreditResponse,
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Codec,
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codecForAmountString,
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codecForAny,
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codecForExchangeGetContractResponse,
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codecForPeerContractTerms,
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CoinStatus,
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constructPayPullUri,
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constructPayPushUri,
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ContractTermsUtil,
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decodeCrock,
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eddsaGetPublic,
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encodeCrock,
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ExchangePurseDeposits,
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ExchangePurseMergeRequest,
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ExchangeReservePurseRequest,
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getRandomBytes,
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InitiatePeerPullCreditRequest,
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InitiatePeerPullCreditResponse,
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InitiatePeerPushPaymentRequest,
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InitiatePeerPushPaymentResponse,
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j2s,
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Logger,
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parsePayPullUri,
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parsePayPushUri,
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PayPeerInsufficientBalanceDetails,
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PeerContractTerms,
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CheckPeerPullCreditRequest,
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CheckPeerPullCreditResponse,
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CheckPeerPushDebitRequest,
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CheckPeerPushDebitResponse,
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RefreshReason,
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strcmp,
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TalerErrorCode,
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TalerProtocolTimestamp,
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TransactionType,
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UnblindedSignature,
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WalletAccountMergeFlags,
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codecOptional,
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codecForTimestamp,
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CancellationToken,
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NotificationType,
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HttpStatusCode,
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codecForWalletKycUuid,
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WalletKycUuid,
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} from "@gnu-taler/taler-util";
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import { SpendCoinDetails } from "../crypto/cryptoImplementation.js";
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import {
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DenominationRecord,
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KycPendingInfo,
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KycUserType,
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OperationStatus,
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PeerPullPaymentIncomingStatus,
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PeerPullPaymentInitiationRecord,
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PeerPullPaymentInitiationStatus,
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PeerPushPaymentCoinSelection,
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PeerPushPaymentIncomingRecord,
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PeerPushPaymentIncomingStatus,
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PeerPushPaymentInitiationStatus,
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ReserveRecord,
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WithdrawalGroupStatus,
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WithdrawalRecordType,
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} from "../db.js";
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import { TalerError } from "@gnu-taler/taler-util";
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import { InternalWalletState } from "../internal-wallet-state.js";
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import {
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LongpollResult,
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makeTransactionId,
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resetOperationTimeout,
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runLongpollAsync,
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runOperationWithErrorReporting,
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spendCoins,
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} from "../operations/common.js";
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import {
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readSuccessResponseJsonOrErrorCode,
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readSuccessResponseJsonOrThrow,
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throwUnexpectedRequestError,
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} from "@gnu-taler/taler-util/http";
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import { checkDbInvariant } from "../util/invariants.js";
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import {
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constructTaskIdentifier,
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OperationAttemptResult,
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OperationAttemptResultType,
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TaskIdentifiers,
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} from "../util/retries.js";
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import { getPeerPaymentBalanceDetailsInTx } from "./balance.js";
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import { updateExchangeFromUrl } from "./exchanges.js";
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import { getTotalRefreshCost } from "./refresh.js";
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import {
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checkWithdrawalKycStatus,
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getExchangeWithdrawalInfo,
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internalCreateWithdrawalGroup,
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processWithdrawalGroup,
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} from "./withdraw.js";
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import { PendingTaskType } from "../pending-types.js";
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import {
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constructTransactionIdentifier,
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stopLongpolling,
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} from "./transactions.js";
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const logger = new Logger("operations/peer-to-peer.ts");
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interface SelectedPeerCoin {
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coinPub: string;
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coinPriv: string;
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contribution: AmountString;
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denomPubHash: string;
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denomSig: UnblindedSignature;
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ageCommitmentProof: AgeCommitmentProof | undefined;
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}
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interface PeerCoinSelectionDetails {
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exchangeBaseUrl: string;
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/**
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* Info of Coins that were selected.
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*/
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coins: SelectedPeerCoin[];
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/**
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* How much of the deposit fees is the customer paying?
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*/
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depositFees: AmountJson;
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}
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/**
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* Information about a selected coin for peer to peer payments.
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*/
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interface CoinInfo {
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/**
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* Public key of the coin.
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*/
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coinPub: string;
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coinPriv: string;
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/**
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* Deposit fee for the coin.
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*/
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feeDeposit: AmountJson;
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value: AmountJson;
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denomPubHash: string;
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denomSig: UnblindedSignature;
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maxAge: number;
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ageCommitmentProof?: AgeCommitmentProof;
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}
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export type SelectPeerCoinsResult =
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| { type: "success"; result: PeerCoinSelectionDetails }
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| {
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type: "failure";
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insufficientBalanceDetails: PayPeerInsufficientBalanceDetails;
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};
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export async function queryCoinInfosForSelection(
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ws: InternalWalletState,
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csel: PeerPushPaymentCoinSelection,
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): Promise<SpendCoinDetails[]> {
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let infos: SpendCoinDetails[] = [];
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await ws.db
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.mktx((x) => [x.coins, x.denominations])
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.runReadOnly(async (tx) => {
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for (let i = 0; i < csel.coinPubs.length; i++) {
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const coin = await tx.coins.get(csel.coinPubs[i]);
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if (!coin) {
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throw Error("coin not found anymore");
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}
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const denom = await ws.getDenomInfo(
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ws,
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tx,
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coin.exchangeBaseUrl,
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coin.denomPubHash,
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);
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if (!denom) {
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throw Error("denom for coin not found anymore");
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}
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infos.push({
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coinPriv: coin.coinPriv,
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coinPub: coin.coinPub,
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denomPubHash: coin.denomPubHash,
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denomSig: coin.denomSig,
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ageCommitmentProof: coin.ageCommitmentProof,
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contribution: csel.contributions[i],
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});
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}
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});
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return infos;
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}
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export async function selectPeerCoins(
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ws: InternalWalletState,
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instructedAmount: AmountJson,
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): Promise<SelectPeerCoinsResult> {
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if (Amounts.isZero(instructedAmount)) {
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// Other parts of the code assume that we have at least
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// one coin to spend.
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throw new Error("amount of zero not allowed");
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}
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return await ws.db
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.mktx((x) => [
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x.exchanges,
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x.contractTerms,
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x.coins,
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x.coinAvailability,
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x.denominations,
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x.refreshGroups,
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x.peerPushPaymentInitiations,
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])
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.runReadWrite(async (tx) => {
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const exchanges = await tx.exchanges.iter().toArray();
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const exchangeFeeGap: { [url: string]: AmountJson } = {};
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const currency = Amounts.currencyOf(instructedAmount);
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for (const exch of exchanges) {
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if (exch.detailsPointer?.currency !== currency) {
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continue;
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}
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const coins = (
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await tx.coins.indexes.byBaseUrl.getAll(exch.baseUrl)
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).filter((x) => x.status === CoinStatus.Fresh);
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const coinInfos: CoinInfo[] = [];
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for (const coin of coins) {
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const denom = await ws.getDenomInfo(
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ws,
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tx,
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coin.exchangeBaseUrl,
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coin.denomPubHash,
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);
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if (!denom) {
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throw Error("denom not found");
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}
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coinInfos.push({
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coinPub: coin.coinPub,
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feeDeposit: Amounts.parseOrThrow(denom.feeDeposit),
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value: Amounts.parseOrThrow(denom.value),
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denomPubHash: denom.denomPubHash,
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coinPriv: coin.coinPriv,
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denomSig: coin.denomSig,
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maxAge: coin.maxAge,
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ageCommitmentProof: coin.ageCommitmentProof,
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});
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}
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if (coinInfos.length === 0) {
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continue;
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}
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coinInfos.sort(
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(o1, o2) =>
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-Amounts.cmp(o1.value, o2.value) ||
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strcmp(o1.denomPubHash, o2.denomPubHash),
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);
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let amountAcc = Amounts.zeroOfCurrency(currency);
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let depositFeesAcc = Amounts.zeroOfCurrency(currency);
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const resCoins: {
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coinPub: string;
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coinPriv: string;
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contribution: AmountString;
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denomPubHash: string;
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denomSig: UnblindedSignature;
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ageCommitmentProof: AgeCommitmentProof | undefined;
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}[] = [];
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let lastDepositFee = Amounts.zeroOfCurrency(currency);
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for (const coin of coinInfos) {
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if (Amounts.cmp(amountAcc, instructedAmount) >= 0) {
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break;
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}
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const gap = Amounts.add(
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coin.feeDeposit,
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Amounts.sub(instructedAmount, amountAcc).amount,
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).amount;
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const contrib = Amounts.min(gap, coin.value);
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amountAcc = Amounts.add(
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amountAcc,
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Amounts.sub(contrib, coin.feeDeposit).amount,
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).amount;
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depositFeesAcc = Amounts.add(depositFeesAcc, coin.feeDeposit).amount;
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resCoins.push({
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coinPriv: coin.coinPriv,
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coinPub: coin.coinPub,
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contribution: Amounts.stringify(contrib),
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denomPubHash: coin.denomPubHash,
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denomSig: coin.denomSig,
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ageCommitmentProof: coin.ageCommitmentProof,
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});
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lastDepositFee = coin.feeDeposit;
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}
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if (Amounts.cmp(amountAcc, instructedAmount) >= 0) {
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const res: PeerCoinSelectionDetails = {
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exchangeBaseUrl: exch.baseUrl,
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coins: resCoins,
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depositFees: depositFeesAcc,
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};
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return { type: "success", result: res };
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}
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const diff = Amounts.sub(instructedAmount, amountAcc).amount;
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exchangeFeeGap[exch.baseUrl] = Amounts.add(lastDepositFee, diff).amount;
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continue;
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}
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// We were unable to select coins.
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// Now we need to produce error details.
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const infoGeneral = await getPeerPaymentBalanceDetailsInTx(ws, tx, {
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currency,
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});
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const perExchange: PayPeerInsufficientBalanceDetails["perExchange"] = {};
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let maxFeeGapEstimate = Amounts.zeroOfCurrency(currency);
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for (const exch of exchanges) {
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if (exch.detailsPointer?.currency !== currency) {
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continue;
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}
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const infoExchange = await getPeerPaymentBalanceDetailsInTx(ws, tx, {
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currency,
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restrictExchangeTo: exch.baseUrl,
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});
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let gap =
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exchangeFeeGap[exch.baseUrl] ?? Amounts.zeroOfCurrency(currency);
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if (Amounts.cmp(infoExchange.balanceMaterial, instructedAmount) < 0) {
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// Show fee gap only if we should've been able to pay with the material amount
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gap = Amounts.zeroOfCurrency(currency);
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}
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perExchange[exch.baseUrl] = {
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balanceAvailable: Amounts.stringify(infoExchange.balanceAvailable),
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balanceMaterial: Amounts.stringify(infoExchange.balanceMaterial),
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feeGapEstimate: Amounts.stringify(gap),
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};
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maxFeeGapEstimate = Amounts.max(maxFeeGapEstimate, gap);
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}
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const errDetails: PayPeerInsufficientBalanceDetails = {
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amountRequested: Amounts.stringify(instructedAmount),
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balanceAvailable: Amounts.stringify(infoGeneral.balanceAvailable),
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balanceMaterial: Amounts.stringify(infoGeneral.balanceMaterial),
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feeGapEstimate: Amounts.stringify(maxFeeGapEstimate),
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perExchange,
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};
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return { type: "failure", insufficientBalanceDetails: errDetails };
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});
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}
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export async function getTotalPeerPaymentCost(
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ws: InternalWalletState,
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pcs: SelectedPeerCoin[],
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): Promise<AmountJson> {
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return ws.db
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.mktx((x) => [x.coins, x.denominations])
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.runReadOnly(async (tx) => {
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const costs: AmountJson[] = [];
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for (let i = 0; i < pcs.length; i++) {
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const coin = await tx.coins.get(pcs[i].coinPub);
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if (!coin) {
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throw Error("can't calculate payment cost, coin not found");
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}
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const denom = await tx.denominations.get([
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coin.exchangeBaseUrl,
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coin.denomPubHash,
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]);
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if (!denom) {
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throw Error(
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"can't calculate payment cost, denomination for coin not found",
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);
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}
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const allDenoms = await tx.denominations.indexes.byExchangeBaseUrl
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.iter(coin.exchangeBaseUrl)
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.filter((x) =>
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Amounts.isSameCurrency(
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DenominationRecord.getValue(x),
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pcs[i].contribution,
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),
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);
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const amountLeft = Amounts.sub(
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DenominationRecord.getValue(denom),
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pcs[i].contribution,
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).amount;
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const refreshCost = getTotalRefreshCost(
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allDenoms,
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DenominationRecord.toDenomInfo(denom),
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amountLeft,
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ws.config.testing.denomselAllowLate,
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);
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costs.push(Amounts.parseOrThrow(pcs[i].contribution));
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costs.push(refreshCost);
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}
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const zero = Amounts.zeroOfAmount(pcs[0].contribution);
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return Amounts.sum([zero, ...costs]).amount;
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});
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}
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export async function checkPeerPushDebit(
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ws: InternalWalletState,
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req: CheckPeerPushDebitRequest,
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): Promise<CheckPeerPushDebitResponse> {
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const instructedAmount = Amounts.parseOrThrow(req.amount);
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const coinSelRes = await selectPeerCoins(ws, instructedAmount);
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if (coinSelRes.type === "failure") {
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throw TalerError.fromDetail(
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TalerErrorCode.WALLET_PEER_PUSH_PAYMENT_INSUFFICIENT_BALANCE,
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{
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insufficientBalanceDetails: coinSelRes.insufficientBalanceDetails,
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},
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);
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}
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const totalAmount = await getTotalPeerPaymentCost(
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ws,
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coinSelRes.result.coins,
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);
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return {
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amountEffective: Amounts.stringify(totalAmount),
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amountRaw: req.amount,
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};
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}
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|
|
export async function processPeerPushInitiation(
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ws: InternalWalletState,
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pursePub: string,
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): Promise<OperationAttemptResult> {
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const peerPushInitiation = await ws.db
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.mktx((x) => [x.peerPushPaymentInitiations])
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.runReadOnly(async (tx) => {
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return tx.peerPushPaymentInitiations.get(pursePub);
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});
|
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if (!peerPushInitiation) {
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throw Error("peer push payment not found");
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}
|
|
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const purseExpiration = peerPushInitiation.purseExpiration;
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const hContractTerms = peerPushInitiation.contractTermsHash;
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|
|
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const purseSigResp = await ws.cryptoApi.signPurseCreation({
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hContractTerms,
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mergePub: peerPushInitiation.mergePub,
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minAge: 0,
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purseAmount: peerPushInitiation.amount,
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purseExpiration,
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|
pursePriv: peerPushInitiation.pursePriv,
|
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});
|
|
|
|
const coins = await queryCoinInfosForSelection(
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ws,
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peerPushInitiation.coinSel,
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);
|
|
|
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const depositSigsResp = await ws.cryptoApi.signPurseDeposits({
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exchangeBaseUrl: peerPushInitiation.exchangeBaseUrl,
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pursePub: peerPushInitiation.pursePub,
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coins,
|
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});
|
|
|
|
const econtractResp = await ws.cryptoApi.encryptContractForMerge({
|
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contractTerms: peerPushInitiation.contractTerms,
|
|
mergePriv: peerPushInitiation.mergePriv,
|
|
pursePriv: peerPushInitiation.pursePriv,
|
|
pursePub: peerPushInitiation.pursePub,
|
|
contractPriv: peerPushInitiation.contractPriv,
|
|
contractPub: peerPushInitiation.contractPub,
|
|
});
|
|
|
|
const createPurseUrl = new URL(
|
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`purses/${peerPushInitiation.pursePub}/create`,
|
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peerPushInitiation.exchangeBaseUrl,
|
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);
|
|
|
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const httpResp = await ws.http.postJson(createPurseUrl.href, {
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amount: peerPushInitiation.amount,
|
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merge_pub: peerPushInitiation.mergePub,
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purse_sig: purseSigResp.sig,
|
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h_contract_terms: hContractTerms,
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|
purse_expiration: purseExpiration,
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deposits: depositSigsResp.deposits,
|
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min_age: 0,
|
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econtract: econtractResp.econtract,
|
|
});
|
|
|
|
const resp = await httpResp.json();
|
|
|
|
logger.info(`resp: ${j2s(resp)}`);
|
|
|
|
if (httpResp.status !== 200) {
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throw Error("got error response from exchange");
|
|
}
|
|
|
|
await ws.db
|
|
.mktx((x) => [x.peerPushPaymentInitiations])
|
|
.runReadWrite(async (tx) => {
|
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const ppi = await tx.peerPushPaymentInitiations.get(pursePub);
|
|
if (!ppi) {
|
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return;
|
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}
|
|
ppi.status = PeerPushPaymentInitiationStatus.PurseCreated;
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await tx.peerPushPaymentInitiations.put(ppi);
|
|
});
|
|
|
|
return {
|
|
type: OperationAttemptResultType.Finished,
|
|
result: undefined,
|
|
};
|
|
}
|
|
|
|
/**
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* Initiate sending a peer-to-peer push payment.
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*/
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export async function initiatePeerPushPayment(
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ws: InternalWalletState,
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req: InitiatePeerPushPaymentRequest,
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): Promise<InitiatePeerPushPaymentResponse> {
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const instructedAmount = Amounts.parseOrThrow(
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req.partialContractTerms.amount,
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);
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const purseExpiration = req.partialContractTerms.purse_expiration;
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const contractTerms = req.partialContractTerms;
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const pursePair = await ws.cryptoApi.createEddsaKeypair({});
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const mergePair = await ws.cryptoApi.createEddsaKeypair({});
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const hContractTerms = ContractTermsUtil.hashContractTerms(contractTerms);
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const contractKeyPair = await ws.cryptoApi.createEddsaKeypair({});
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const coinSelRes = await selectPeerCoins(ws, instructedAmount);
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if (coinSelRes.type !== "success") {
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throw TalerError.fromDetail(
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TalerErrorCode.WALLET_PEER_PUSH_PAYMENT_INSUFFICIENT_BALANCE,
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{
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insufficientBalanceDetails: coinSelRes.insufficientBalanceDetails,
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},
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);
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}
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const sel = coinSelRes.result;
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logger.info(`selected p2p coins (push): ${j2s(coinSelRes)}`);
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const totalAmount = await getTotalPeerPaymentCost(
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ws,
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coinSelRes.result.coins,
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);
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await ws.db
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.mktx((x) => [
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x.exchanges,
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x.contractTerms,
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x.coins,
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x.coinAvailability,
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x.denominations,
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x.refreshGroups,
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x.peerPushPaymentInitiations,
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])
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.runReadWrite(async (tx) => {
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// FIXME: Instead of directly doing a spendCoin here,
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// we might want to mark the coins as used and spend them
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// after we've been able to create the purse.
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await spendCoins(ws, tx, {
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allocationId: `txn:peer-push-debit:${pursePair.pub}`,
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coinPubs: sel.coins.map((x) => x.coinPub),
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contributions: sel.coins.map((x) =>
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Amounts.parseOrThrow(x.contribution),
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),
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refreshReason: RefreshReason.PayPeerPush,
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});
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await tx.peerPushPaymentInitiations.add({
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amount: Amounts.stringify(instructedAmount),
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contractPriv: contractKeyPair.priv,
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contractPub: contractKeyPair.pub,
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contractTermsHash: hContractTerms,
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exchangeBaseUrl: sel.exchangeBaseUrl,
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mergePriv: mergePair.priv,
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mergePub: mergePair.pub,
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purseExpiration: purseExpiration,
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pursePriv: pursePair.priv,
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pursePub: pursePair.pub,
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timestampCreated: TalerProtocolTimestamp.now(),
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status: PeerPushPaymentInitiationStatus.Initiated,
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contractTerms: contractTerms,
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coinSel: {
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coinPubs: sel.coins.map((x) => x.coinPub),
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contributions: sel.coins.map((x) => x.contribution),
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},
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totalCost: Amounts.stringify(totalAmount),
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});
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await tx.contractTerms.put({
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h: hContractTerms,
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contractTermsRaw: contractTerms,
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});
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});
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const taskId = constructTaskIdentifier({
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tag: PendingTaskType.PeerPushInitiation,
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pursePub: pursePair.pub,
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});
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await runOperationWithErrorReporting(ws, taskId, async () => {
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return await processPeerPushInitiation(ws, pursePair.pub);
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});
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return {
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contractPriv: contractKeyPair.priv,
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mergePriv: mergePair.priv,
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pursePub: pursePair.pub,
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exchangeBaseUrl: coinSelRes.result.exchangeBaseUrl,
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talerUri: constructPayPushUri({
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exchangeBaseUrl: coinSelRes.result.exchangeBaseUrl,
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contractPriv: contractKeyPair.priv,
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}),
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transactionId: makeTransactionId(
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TransactionType.PeerPushDebit,
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pursePair.pub,
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),
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};
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}
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interface ExchangePurseStatus {
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balance: AmountString;
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deposit_timestamp?: TalerProtocolTimestamp;
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}
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export const codecForExchangePurseStatus = (): Codec<ExchangePurseStatus> =>
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buildCodecForObject<ExchangePurseStatus>()
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.property("balance", codecForAmountString())
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.property("deposit_timestamp", codecOptional(codecForTimestamp))
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.build("ExchangePurseStatus");
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export async function preparePeerPushCredit(
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ws: InternalWalletState,
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req: PreparePeerPushCredit,
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): Promise<PreparePeerPushCreditResponse> {
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const uri = parsePayPushUri(req.talerUri);
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if (!uri) {
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throw Error("got invalid taler://pay-push URI");
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}
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const existing = await ws.db
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.mktx((x) => [x.contractTerms, x.peerPushPaymentIncoming])
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.runReadOnly(async (tx) => {
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const existingPushInc =
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await tx.peerPushPaymentIncoming.indexes.byExchangeAndContractPriv.get([
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uri.exchangeBaseUrl,
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uri.contractPriv,
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]);
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if (!existingPushInc) {
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return;
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}
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const existingContractTermsRec = await tx.contractTerms.get(
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existingPushInc.contractTermsHash,
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);
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if (!existingContractTermsRec) {
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throw Error(
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"contract terms for peer push payment credit not found in database",
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);
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}
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const existingContractTerms = codecForPeerContractTerms().decode(
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existingContractTermsRec.contractTermsRaw,
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);
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return { existingPushInc, existingContractTerms };
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});
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if (existing) {
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return {
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amount: existing.existingContractTerms.amount,
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amountEffective: existing.existingPushInc.estimatedAmountEffective,
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amountRaw: existing.existingContractTerms.amount,
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contractTerms: existing.existingContractTerms,
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peerPushPaymentIncomingId:
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existing.existingPushInc.peerPushPaymentIncomingId,
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};
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}
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const exchangeBaseUrl = uri.exchangeBaseUrl;
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await updateExchangeFromUrl(ws, exchangeBaseUrl);
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const contractPriv = uri.contractPriv;
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const contractPub = encodeCrock(eddsaGetPublic(decodeCrock(contractPriv)));
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const getContractUrl = new URL(`contracts/${contractPub}`, exchangeBaseUrl);
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const contractHttpResp = await ws.http.get(getContractUrl.href);
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const contractResp = await readSuccessResponseJsonOrThrow(
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contractHttpResp,
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codecForExchangeGetContractResponse(),
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);
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const pursePub = contractResp.purse_pub;
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const dec = await ws.cryptoApi.decryptContractForMerge({
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ciphertext: contractResp.econtract,
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contractPriv: contractPriv,
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pursePub: pursePub,
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});
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const getPurseUrl = new URL(`purses/${pursePub}/deposit`, exchangeBaseUrl);
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const purseHttpResp = await ws.http.get(getPurseUrl.href);
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const purseStatus = await readSuccessResponseJsonOrThrow(
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purseHttpResp,
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codecForExchangePurseStatus(),
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);
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const peerPushPaymentIncomingId = encodeCrock(getRandomBytes(32));
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const contractTermsHash = ContractTermsUtil.hashContractTerms(
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dec.contractTerms,
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);
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const withdrawalGroupId = encodeCrock(getRandomBytes(32));
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const wi = await getExchangeWithdrawalInfo(
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ws,
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exchangeBaseUrl,
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Amounts.parseOrThrow(purseStatus.balance),
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undefined,
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);
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await ws.db
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.mktx((x) => [x.contractTerms, x.peerPushPaymentIncoming])
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.runReadWrite(async (tx) => {
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await tx.peerPushPaymentIncoming.add({
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peerPushPaymentIncomingId,
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contractPriv: contractPriv,
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exchangeBaseUrl: exchangeBaseUrl,
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mergePriv: dec.mergePriv,
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pursePub: pursePub,
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timestamp: TalerProtocolTimestamp.now(),
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contractTermsHash,
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status: PeerPushPaymentIncomingStatus.Proposed,
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withdrawalGroupId,
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currency: Amounts.currencyOf(purseStatus.balance),
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estimatedAmountEffective: Amounts.stringify(
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wi.withdrawalAmountEffective,
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),
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});
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await tx.contractTerms.put({
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h: contractTermsHash,
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contractTermsRaw: dec.contractTerms,
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});
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});
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return {
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amount: purseStatus.balance,
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amountEffective: wi.withdrawalAmountEffective,
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amountRaw: purseStatus.balance,
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contractTerms: dec.contractTerms,
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peerPushPaymentIncomingId,
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};
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}
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export function talerPaytoFromExchangeReserve(
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exchangeBaseUrl: string,
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reservePub: string,
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): string {
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const url = new URL(exchangeBaseUrl);
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let proto: string;
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if (url.protocol === "http:") {
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proto = "taler-reserve-http";
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} else if (url.protocol === "https:") {
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proto = "taler-reserve";
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} else {
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throw Error(`unsupported exchange base URL protocol (${url.protocol})`);
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}
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let path = url.pathname;
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if (!path.endsWith("/")) {
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path = path + "/";
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}
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return `payto://${proto}/${url.host}${url.pathname}${reservePub}`;
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}
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async function getMergeReserveInfo(
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ws: InternalWalletState,
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req: {
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exchangeBaseUrl: string;
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},
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): Promise<ReserveRecord> {
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// We have to eagerly create the key pair outside of the transaction,
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// due to the async crypto API.
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const newReservePair = await ws.cryptoApi.createEddsaKeypair({});
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const mergeReserveRecord: ReserveRecord = await ws.db
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.mktx((x) => [x.exchanges, x.reserves, x.withdrawalGroups])
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.runReadWrite(async (tx) => {
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const ex = await tx.exchanges.get(req.exchangeBaseUrl);
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checkDbInvariant(!!ex);
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if (ex.currentMergeReserveRowId != null) {
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const reserve = await tx.reserves.get(ex.currentMergeReserveRowId);
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checkDbInvariant(!!reserve);
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return reserve;
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}
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const reserve: ReserveRecord = {
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reservePriv: newReservePair.priv,
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reservePub: newReservePair.pub,
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};
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const insertResp = await tx.reserves.put(reserve);
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checkDbInvariant(typeof insertResp.key === "number");
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reserve.rowId = insertResp.key;
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ex.currentMergeReserveRowId = reserve.rowId;
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await tx.exchanges.put(ex);
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return reserve;
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});
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return mergeReserveRecord;
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}
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export async function processPeerPushCredit(
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ws: InternalWalletState,
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peerPushPaymentIncomingId: string,
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): Promise<OperationAttemptResult> {
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let peerInc: PeerPushPaymentIncomingRecord | undefined;
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let contractTerms: PeerContractTerms | undefined;
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await ws.db
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.mktx((x) => [x.contractTerms, x.peerPushPaymentIncoming])
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.runReadWrite(async (tx) => {
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peerInc = await tx.peerPushPaymentIncoming.get(peerPushPaymentIncomingId);
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if (!peerInc) {
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return;
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}
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const ctRec = await tx.contractTerms.get(peerInc.contractTermsHash);
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if (ctRec) {
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contractTerms = ctRec.contractTermsRaw;
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}
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await tx.peerPushPaymentIncoming.put(peerInc);
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});
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if (!peerInc) {
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throw Error(
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`can't accept unknown incoming p2p push payment (${peerPushPaymentIncomingId})`,
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);
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}
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checkDbInvariant(!!contractTerms);
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const amount = Amounts.parseOrThrow(contractTerms.amount);
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if (
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peerInc.status === PeerPushPaymentIncomingStatus.KycRequired &&
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peerInc.kycInfo
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) {
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const txId = makeTransactionId(
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TransactionType.PeerPushCredit,
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peerInc.peerPushPaymentIncomingId,
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);
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await checkWithdrawalKycStatus(
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ws,
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peerInc.exchangeBaseUrl,
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txId,
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peerInc.kycInfo,
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"individual",
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);
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}
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const mergeReserveInfo = await getMergeReserveInfo(ws, {
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exchangeBaseUrl: peerInc.exchangeBaseUrl,
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});
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const mergeTimestamp = TalerProtocolTimestamp.now();
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const reservePayto = talerPaytoFromExchangeReserve(
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peerInc.exchangeBaseUrl,
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mergeReserveInfo.reservePub,
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);
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const sigRes = await ws.cryptoApi.signPurseMerge({
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contractTermsHash: ContractTermsUtil.hashContractTerms(contractTerms),
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flags: WalletAccountMergeFlags.MergeFullyPaidPurse,
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mergePriv: peerInc.mergePriv,
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mergeTimestamp: mergeTimestamp,
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purseAmount: Amounts.stringify(amount),
|
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purseExpiration: contractTerms.purse_expiration,
|
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purseFee: Amounts.stringify(Amounts.zeroOfCurrency(amount.currency)),
|
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pursePub: peerInc.pursePub,
|
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reservePayto,
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reservePriv: mergeReserveInfo.reservePriv,
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});
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const mergePurseUrl = new URL(
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`purses/${peerInc.pursePub}/merge`,
|
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peerInc.exchangeBaseUrl,
|
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);
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const mergeReq: ExchangePurseMergeRequest = {
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payto_uri: reservePayto,
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merge_timestamp: mergeTimestamp,
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merge_sig: sigRes.mergeSig,
|
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reserve_sig: sigRes.accountSig,
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|
};
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const mergeHttpResp = await ws.http.postJson(mergePurseUrl.href, mergeReq);
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if (mergeHttpResp.status === HttpStatusCode.UnavailableForLegalReasons) {
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const respJson = await mergeHttpResp.json();
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const kycPending = codecForWalletKycUuid().decode(respJson);
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logger.info(`kyc uuid response: ${j2s(kycPending)}`);
|
|
|
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await ws.db
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.mktx((x) => [x.peerPushPaymentIncoming])
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.runReadWrite(async (tx) => {
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const peerInc = await tx.peerPushPaymentIncoming.get(
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peerPushPaymentIncomingId,
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);
|
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if (!peerInc) {
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return;
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|
}
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peerInc.kycInfo = {
|
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paytoHash: kycPending.h_payto,
|
|
requirementRow: kycPending.requirement_row,
|
|
};
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peerInc.status = PeerPushPaymentIncomingStatus.KycRequired;
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await tx.peerPushPaymentIncoming.put(peerInc);
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});
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return {
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type: OperationAttemptResultType.Pending,
|
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result: undefined,
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};
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}
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|
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logger.trace(`merge request: ${j2s(mergeReq)}`);
|
|
const res = await readSuccessResponseJsonOrThrow(
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mergeHttpResp,
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codecForAny(),
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|
);
|
|
logger.trace(`merge response: ${j2s(res)}`);
|
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|
|
await internalCreateWithdrawalGroup(ws, {
|
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amount,
|
|
wgInfo: {
|
|
withdrawalType: WithdrawalRecordType.PeerPushCredit,
|
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contractTerms,
|
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},
|
|
forcedWithdrawalGroupId: peerInc.withdrawalGroupId,
|
|
exchangeBaseUrl: peerInc.exchangeBaseUrl,
|
|
reserveStatus: WithdrawalGroupStatus.QueryingStatus,
|
|
reserveKeyPair: {
|
|
priv: mergeReserveInfo.reservePriv,
|
|
pub: mergeReserveInfo.reservePub,
|
|
},
|
|
});
|
|
|
|
await ws.db
|
|
.mktx((x) => [x.contractTerms, x.peerPushPaymentIncoming])
|
|
.runReadWrite(async (tx) => {
|
|
const peerInc = await tx.peerPushPaymentIncoming.get(
|
|
peerPushPaymentIncomingId,
|
|
);
|
|
if (!peerInc) {
|
|
return;
|
|
}
|
|
if (
|
|
peerInc.status === PeerPushPaymentIncomingStatus.Accepted ||
|
|
peerInc.status === PeerPushPaymentIncomingStatus.KycRequired
|
|
) {
|
|
peerInc.status = PeerPushPaymentIncomingStatus.WithdrawalCreated;
|
|
}
|
|
await tx.peerPushPaymentIncoming.put(peerInc);
|
|
});
|
|
|
|
return {
|
|
type: OperationAttemptResultType.Finished,
|
|
result: undefined,
|
|
};
|
|
}
|
|
|
|
export async function confirmPeerPushCredit(
|
|
ws: InternalWalletState,
|
|
req: ConfirmPeerPushCreditRequest,
|
|
): Promise<AcceptPeerPushPaymentResponse> {
|
|
let peerInc: PeerPushPaymentIncomingRecord | undefined;
|
|
let contractTerms: PeerContractTerms | undefined;
|
|
await ws.db
|
|
.mktx((x) => [x.contractTerms, x.peerPushPaymentIncoming])
|
|
.runReadWrite(async (tx) => {
|
|
peerInc = await tx.peerPushPaymentIncoming.get(
|
|
req.peerPushPaymentIncomingId,
|
|
);
|
|
if (!peerInc) {
|
|
return;
|
|
}
|
|
const ctRec = await tx.contractTerms.get(peerInc.contractTermsHash);
|
|
if (ctRec) {
|
|
contractTerms = ctRec.contractTermsRaw;
|
|
}
|
|
if (peerInc.status === PeerPushPaymentIncomingStatus.Proposed) {
|
|
peerInc.status = PeerPushPaymentIncomingStatus.Accepted;
|
|
}
|
|
await tx.peerPushPaymentIncoming.put(peerInc);
|
|
});
|
|
|
|
if (!peerInc) {
|
|
throw Error(
|
|
`can't accept unknown incoming p2p push payment (${req.peerPushPaymentIncomingId})`,
|
|
);
|
|
}
|
|
|
|
checkDbInvariant(!!contractTerms);
|
|
|
|
await updateExchangeFromUrl(ws, peerInc.exchangeBaseUrl);
|
|
|
|
const retryTag = TaskIdentifiers.forPeerPushCredit(peerInc);
|
|
|
|
await runOperationWithErrorReporting(ws, retryTag, () =>
|
|
processPeerPushCredit(ws, req.peerPushPaymentIncomingId),
|
|
);
|
|
|
|
return {
|
|
transactionId: makeTransactionId(
|
|
TransactionType.PeerPushCredit,
|
|
req.peerPushPaymentIncomingId,
|
|
),
|
|
};
|
|
}
|
|
|
|
export async function processPeerPullDebit(
|
|
ws: InternalWalletState,
|
|
peerPullPaymentIncomingId: string,
|
|
): Promise<OperationAttemptResult> {
|
|
const peerPullInc = await ws.db
|
|
.mktx((x) => [x.peerPullPaymentIncoming])
|
|
.runReadOnly(async (tx) => {
|
|
return tx.peerPullPaymentIncoming.get(peerPullPaymentIncomingId);
|
|
});
|
|
if (!peerPullInc) {
|
|
throw Error("peer pull debit not found");
|
|
}
|
|
if (peerPullInc.status === PeerPullPaymentIncomingStatus.Accepted) {
|
|
const pursePub = peerPullInc.pursePub;
|
|
|
|
const coinSel = peerPullInc.coinSel;
|
|
if (!coinSel) {
|
|
throw Error("invalid state, no coins selected");
|
|
}
|
|
|
|
const coins = await queryCoinInfosForSelection(ws, coinSel);
|
|
|
|
const depositSigsResp = await ws.cryptoApi.signPurseDeposits({
|
|
exchangeBaseUrl: peerPullInc.exchangeBaseUrl,
|
|
pursePub: peerPullInc.pursePub,
|
|
coins,
|
|
});
|
|
|
|
const purseDepositUrl = new URL(
|
|
`purses/${pursePub}/deposit`,
|
|
peerPullInc.exchangeBaseUrl,
|
|
);
|
|
|
|
const depositPayload: ExchangePurseDeposits = {
|
|
deposits: depositSigsResp.deposits,
|
|
};
|
|
|
|
if (logger.shouldLogTrace()) {
|
|
logger.trace(`purse deposit payload: ${j2s(depositPayload)}`);
|
|
}
|
|
|
|
const httpResp = await ws.http.postJson(
|
|
purseDepositUrl.href,
|
|
depositPayload,
|
|
);
|
|
const resp = await readSuccessResponseJsonOrThrow(httpResp, codecForAny());
|
|
logger.trace(`purse deposit response: ${j2s(resp)}`);
|
|
}
|
|
|
|
await ws.db
|
|
.mktx((x) => [x.peerPullPaymentIncoming])
|
|
.runReadWrite(async (tx) => {
|
|
const pi = await tx.peerPullPaymentIncoming.get(
|
|
peerPullPaymentIncomingId,
|
|
);
|
|
if (!pi) {
|
|
throw Error("peer pull payment not found anymore");
|
|
}
|
|
if (pi.status === PeerPullPaymentIncomingStatus.Accepted) {
|
|
pi.status = PeerPullPaymentIncomingStatus.Paid;
|
|
}
|
|
await tx.peerPullPaymentIncoming.put(pi);
|
|
});
|
|
|
|
return {
|
|
type: OperationAttemptResultType.Finished,
|
|
result: undefined,
|
|
};
|
|
}
|
|
|
|
export async function confirmPeerPullDebit(
|
|
ws: InternalWalletState,
|
|
req: ConfirmPeerPullDebitRequest,
|
|
): Promise<AcceptPeerPullPaymentResponse> {
|
|
const peerPullInc = await ws.db
|
|
.mktx((x) => [x.peerPullPaymentIncoming])
|
|
.runReadOnly(async (tx) => {
|
|
return tx.peerPullPaymentIncoming.get(req.peerPullPaymentIncomingId);
|
|
});
|
|
|
|
if (!peerPullInc) {
|
|
throw Error(
|
|
`can't accept unknown incoming p2p pull payment (${req.peerPullPaymentIncomingId})`,
|
|
);
|
|
}
|
|
|
|
const instructedAmount = Amounts.parseOrThrow(
|
|
peerPullInc.contractTerms.amount,
|
|
);
|
|
|
|
const coinSelRes = await selectPeerCoins(ws, instructedAmount);
|
|
logger.info(`selected p2p coins (pull): ${j2s(coinSelRes)}`);
|
|
|
|
if (coinSelRes.type !== "success") {
|
|
throw TalerError.fromDetail(
|
|
TalerErrorCode.WALLET_PEER_PUSH_PAYMENT_INSUFFICIENT_BALANCE,
|
|
{
|
|
insufficientBalanceDetails: coinSelRes.insufficientBalanceDetails,
|
|
},
|
|
);
|
|
}
|
|
|
|
const sel = coinSelRes.result;
|
|
|
|
const totalAmount = await getTotalPeerPaymentCost(
|
|
ws,
|
|
coinSelRes.result.coins,
|
|
);
|
|
|
|
const ppi = await ws.db
|
|
.mktx((x) => [
|
|
x.exchanges,
|
|
x.coins,
|
|
x.denominations,
|
|
x.refreshGroups,
|
|
x.peerPullPaymentIncoming,
|
|
x.coinAvailability,
|
|
])
|
|
.runReadWrite(async (tx) => {
|
|
await spendCoins(ws, tx, {
|
|
allocationId: `txn:peer-pull-debit:${req.peerPullPaymentIncomingId}`,
|
|
coinPubs: sel.coins.map((x) => x.coinPub),
|
|
contributions: sel.coins.map((x) =>
|
|
Amounts.parseOrThrow(x.contribution),
|
|
),
|
|
refreshReason: RefreshReason.PayPeerPull,
|
|
});
|
|
|
|
const pi = await tx.peerPullPaymentIncoming.get(
|
|
req.peerPullPaymentIncomingId,
|
|
);
|
|
if (!pi) {
|
|
throw Error();
|
|
}
|
|
if (pi.status === PeerPullPaymentIncomingStatus.Proposed) {
|
|
pi.status = PeerPullPaymentIncomingStatus.Accepted;
|
|
pi.coinSel = {
|
|
coinPubs: sel.coins.map((x) => x.coinPub),
|
|
contributions: sel.coins.map((x) => x.contribution),
|
|
totalCost: Amounts.stringify(totalAmount),
|
|
};
|
|
}
|
|
await tx.peerPullPaymentIncoming.put(pi);
|
|
return pi;
|
|
});
|
|
|
|
await runOperationWithErrorReporting(
|
|
ws,
|
|
TaskIdentifiers.forPeerPullPaymentDebit(ppi),
|
|
async () => {
|
|
return processPeerPullDebit(ws, ppi.peerPullPaymentIncomingId);
|
|
},
|
|
);
|
|
|
|
return {
|
|
transactionId: makeTransactionId(
|
|
TransactionType.PeerPullDebit,
|
|
req.peerPullPaymentIncomingId,
|
|
),
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Look up information about an incoming peer pull payment.
|
|
* Store the results in the wallet DB.
|
|
*/
|
|
export async function preparePeerPullDebit(
|
|
ws: InternalWalletState,
|
|
req: PreparePeerPullDebitRequest,
|
|
): Promise<PreparePeerPullDebitResponse> {
|
|
const uri = parsePayPullUri(req.talerUri);
|
|
|
|
if (!uri) {
|
|
throw Error("got invalid taler://pay-pull URI");
|
|
}
|
|
|
|
const existingPullIncomingRecord = await ws.db
|
|
.mktx((x) => [x.peerPullPaymentIncoming])
|
|
.runReadOnly(async (tx) => {
|
|
return tx.peerPullPaymentIncoming.indexes.byExchangeAndContractPriv.get([
|
|
uri.exchangeBaseUrl,
|
|
uri.contractPriv,
|
|
]);
|
|
});
|
|
|
|
if (existingPullIncomingRecord) {
|
|
return {
|
|
amount: existingPullIncomingRecord.contractTerms.amount,
|
|
amountRaw: existingPullIncomingRecord.contractTerms.amount,
|
|
amountEffective: existingPullIncomingRecord.totalCostEstimated,
|
|
contractTerms: existingPullIncomingRecord.contractTerms,
|
|
peerPullPaymentIncomingId:
|
|
existingPullIncomingRecord.peerPullPaymentIncomingId,
|
|
};
|
|
}
|
|
|
|
const exchangeBaseUrl = uri.exchangeBaseUrl;
|
|
const contractPriv = uri.contractPriv;
|
|
const contractPub = encodeCrock(eddsaGetPublic(decodeCrock(contractPriv)));
|
|
|
|
const getContractUrl = new URL(`contracts/${contractPub}`, exchangeBaseUrl);
|
|
|
|
const contractHttpResp = await ws.http.get(getContractUrl.href);
|
|
|
|
const contractResp = await readSuccessResponseJsonOrThrow(
|
|
contractHttpResp,
|
|
codecForExchangeGetContractResponse(),
|
|
);
|
|
|
|
const pursePub = contractResp.purse_pub;
|
|
|
|
const dec = await ws.cryptoApi.decryptContractForDeposit({
|
|
ciphertext: contractResp.econtract,
|
|
contractPriv: contractPriv,
|
|
pursePub: pursePub,
|
|
});
|
|
|
|
const getPurseUrl = new URL(`purses/${pursePub}/merge`, exchangeBaseUrl);
|
|
|
|
const purseHttpResp = await ws.http.get(getPurseUrl.href);
|
|
|
|
const purseStatus = await readSuccessResponseJsonOrThrow(
|
|
purseHttpResp,
|
|
codecForExchangePurseStatus(),
|
|
);
|
|
|
|
const peerPullPaymentIncomingId = encodeCrock(getRandomBytes(32));
|
|
|
|
let contractTerms: PeerContractTerms;
|
|
|
|
if (dec.contractTerms) {
|
|
contractTerms = codecForPeerContractTerms().decode(dec.contractTerms);
|
|
// FIXME: Check that the purseStatus balance matches contract terms amount
|
|
} else {
|
|
// FIXME: In this case, where do we get the purse expiration from?!
|
|
// https://bugs.gnunet.org/view.php?id=7706
|
|
throw Error("pull payments without contract terms not supported yet");
|
|
}
|
|
|
|
// FIXME: Why don't we compute the totalCost here?!
|
|
|
|
const instructedAmount = Amounts.parseOrThrow(contractTerms.amount);
|
|
|
|
const coinSelRes = await selectPeerCoins(ws, instructedAmount);
|
|
logger.info(`selected p2p coins (pull): ${j2s(coinSelRes)}`);
|
|
|
|
if (coinSelRes.type !== "success") {
|
|
throw TalerError.fromDetail(
|
|
TalerErrorCode.WALLET_PEER_PUSH_PAYMENT_INSUFFICIENT_BALANCE,
|
|
{
|
|
insufficientBalanceDetails: coinSelRes.insufficientBalanceDetails,
|
|
},
|
|
);
|
|
}
|
|
|
|
const totalAmount = await getTotalPeerPaymentCost(
|
|
ws,
|
|
coinSelRes.result.coins,
|
|
);
|
|
|
|
await ws.db
|
|
.mktx((x) => [x.peerPullPaymentIncoming])
|
|
.runReadWrite(async (tx) => {
|
|
await tx.peerPullPaymentIncoming.add({
|
|
peerPullPaymentIncomingId,
|
|
contractPriv: contractPriv,
|
|
exchangeBaseUrl: exchangeBaseUrl,
|
|
pursePub: pursePub,
|
|
timestampCreated: TalerProtocolTimestamp.now(),
|
|
contractTerms,
|
|
status: PeerPullPaymentIncomingStatus.Proposed,
|
|
totalCostEstimated: Amounts.stringify(totalAmount),
|
|
});
|
|
});
|
|
|
|
return {
|
|
amount: contractTerms.amount,
|
|
amountEffective: Amounts.stringify(totalAmount),
|
|
amountRaw: contractTerms.amount,
|
|
contractTerms: contractTerms,
|
|
peerPullPaymentIncomingId,
|
|
};
|
|
}
|
|
|
|
export async function queryPurseForPeerPullCredit(
|
|
ws: InternalWalletState,
|
|
pullIni: PeerPullPaymentInitiationRecord,
|
|
cancellationToken: CancellationToken,
|
|
): Promise<LongpollResult> {
|
|
const purseDepositUrl = new URL(
|
|
`purses/${pullIni.pursePub}/deposit`,
|
|
pullIni.exchangeBaseUrl,
|
|
);
|
|
purseDepositUrl.searchParams.set("timeout_ms", "30000");
|
|
logger.info(`querying purse status via ${purseDepositUrl.href}`);
|
|
const resp = await ws.http.get(purseDepositUrl.href, {
|
|
timeout: { d_ms: 60000 },
|
|
cancellationToken,
|
|
});
|
|
|
|
logger.info(`purse status code: HTTP ${resp.status}`);
|
|
|
|
const result = await readSuccessResponseJsonOrErrorCode(
|
|
resp,
|
|
codecForExchangePurseStatus(),
|
|
);
|
|
|
|
if (result.isError) {
|
|
logger.info(`got purse status error, EC=${result.talerErrorResponse.code}`);
|
|
if (resp.status === 404) {
|
|
return { ready: false };
|
|
} else {
|
|
throwUnexpectedRequestError(resp, result.talerErrorResponse);
|
|
}
|
|
}
|
|
|
|
if (!result.response.deposit_timestamp) {
|
|
logger.info("purse not ready yet (no deposit)");
|
|
return { ready: false };
|
|
}
|
|
|
|
const reserve = await ws.db
|
|
.mktx((x) => [x.reserves])
|
|
.runReadOnly(async (tx) => {
|
|
return await tx.reserves.get(pullIni.mergeReserveRowId);
|
|
});
|
|
|
|
if (!reserve) {
|
|
throw Error("reserve for peer pull credit not found in wallet DB");
|
|
}
|
|
|
|
await internalCreateWithdrawalGroup(ws, {
|
|
amount: Amounts.parseOrThrow(pullIni.amount),
|
|
wgInfo: {
|
|
withdrawalType: WithdrawalRecordType.PeerPullCredit,
|
|
contractTerms: pullIni.contractTerms,
|
|
contractPriv: pullIni.contractPriv,
|
|
},
|
|
forcedWithdrawalGroupId: pullIni.withdrawalGroupId,
|
|
exchangeBaseUrl: pullIni.exchangeBaseUrl,
|
|
reserveStatus: WithdrawalGroupStatus.QueryingStatus,
|
|
reserveKeyPair: {
|
|
priv: reserve.reservePriv,
|
|
pub: reserve.reservePub,
|
|
},
|
|
});
|
|
|
|
await ws.db
|
|
.mktx((x) => [x.peerPullPaymentInitiations])
|
|
.runReadWrite(async (tx) => {
|
|
const finPi = await tx.peerPullPaymentInitiations.get(pullIni.pursePub);
|
|
if (!finPi) {
|
|
logger.warn("peerPullPaymentInitiation not found anymore");
|
|
return;
|
|
}
|
|
if (finPi.status === PeerPullPaymentInitiationStatus.PurseCreated) {
|
|
finPi.status = PeerPullPaymentInitiationStatus.PurseDeposited;
|
|
}
|
|
await tx.peerPullPaymentInitiations.put(finPi);
|
|
});
|
|
return {
|
|
ready: true,
|
|
};
|
|
}
|
|
|
|
export async function processPeerPullCredit(
|
|
ws: InternalWalletState,
|
|
pursePub: string,
|
|
): Promise<OperationAttemptResult> {
|
|
const pullIni = await ws.db
|
|
.mktx((x) => [x.peerPullPaymentInitiations])
|
|
.runReadOnly(async (tx) => {
|
|
return tx.peerPullPaymentInitiations.get(pursePub);
|
|
});
|
|
if (!pullIni) {
|
|
throw Error("peer pull payment initiation not found in database");
|
|
}
|
|
|
|
const retryTag = constructTaskIdentifier({
|
|
tag: PendingTaskType.PeerPullInitiation,
|
|
pursePub,
|
|
});
|
|
|
|
// We're already running!
|
|
if (ws.activeLongpoll[retryTag]) {
|
|
logger.info("peer-pull-credit already in long-polling, returning!");
|
|
return {
|
|
type: OperationAttemptResultType.Longpoll,
|
|
};
|
|
}
|
|
|
|
logger.trace(`processing ${retryTag}, status=${pullIni.status}`);
|
|
|
|
switch (pullIni.status) {
|
|
case PeerPullPaymentInitiationStatus.PurseDeposited: {
|
|
// We implement this case so that the "retry" action on a peer-pull-credit transaction
|
|
// also retries the withdrawal task.
|
|
|
|
logger.warn(
|
|
"peer pull payment initiation is already finished, retrying withdrawal",
|
|
);
|
|
|
|
const withdrawalGroupId = pullIni.withdrawalGroupId;
|
|
|
|
if (withdrawalGroupId) {
|
|
const taskId = constructTaskIdentifier({
|
|
tag: PendingTaskType.Withdraw,
|
|
withdrawalGroupId,
|
|
});
|
|
stopLongpolling(ws, taskId);
|
|
await resetOperationTimeout(ws, taskId);
|
|
await runOperationWithErrorReporting(ws, taskId, () =>
|
|
processWithdrawalGroup(ws, withdrawalGroupId),
|
|
);
|
|
}
|
|
return {
|
|
type: OperationAttemptResultType.Finished,
|
|
result: undefined,
|
|
};
|
|
}
|
|
case PeerPullPaymentInitiationStatus.PurseCreated:
|
|
runLongpollAsync(ws, retryTag, async (cancellationToken) =>
|
|
queryPurseForPeerPullCredit(ws, pullIni, cancellationToken),
|
|
);
|
|
logger.trace(
|
|
"returning early from processPeerPullCredit for long-polling in background",
|
|
);
|
|
return {
|
|
type: OperationAttemptResultType.Longpoll,
|
|
};
|
|
case PeerPullPaymentInitiationStatus.KycRequired: {
|
|
if (pullIni.kycInfo) {
|
|
const txId = makeTransactionId(
|
|
TransactionType.PeerPullCredit,
|
|
pullIni.pursePub,
|
|
);
|
|
await checkWithdrawalKycStatus(
|
|
ws,
|
|
pullIni.exchangeBaseUrl,
|
|
txId,
|
|
pullIni.kycInfo,
|
|
"individual",
|
|
);
|
|
}
|
|
break;
|
|
}
|
|
case PeerPullPaymentInitiationStatus.Initial:
|
|
break;
|
|
default:
|
|
throw Error(`unknown PeerPullPaymentInitiationStatus ${pullIni.status}`);
|
|
}
|
|
|
|
const mergeReserve = await ws.db
|
|
.mktx((x) => [x.reserves])
|
|
.runReadOnly(async (tx) => {
|
|
return tx.reserves.get(pullIni.mergeReserveRowId);
|
|
});
|
|
|
|
if (!mergeReserve) {
|
|
throw Error("merge reserve for peer pull payment not found in database");
|
|
}
|
|
|
|
const purseFee = Amounts.stringify(Amounts.zeroOfAmount(pullIni.amount));
|
|
|
|
const reservePayto = talerPaytoFromExchangeReserve(
|
|
pullIni.exchangeBaseUrl,
|
|
mergeReserve.reservePub,
|
|
);
|
|
|
|
const econtractResp = await ws.cryptoApi.encryptContractForDeposit({
|
|
contractPriv: pullIni.contractPriv,
|
|
contractPub: pullIni.contractPub,
|
|
contractTerms: pullIni.contractTerms,
|
|
pursePriv: pullIni.pursePriv,
|
|
pursePub: pullIni.pursePub,
|
|
});
|
|
|
|
const purseExpiration = pullIni.contractTerms.purse_expiration;
|
|
const sigRes = await ws.cryptoApi.signReservePurseCreate({
|
|
contractTermsHash: pullIni.contractTermsHash,
|
|
flags: WalletAccountMergeFlags.CreateWithPurseFee,
|
|
mergePriv: pullIni.mergePriv,
|
|
mergeTimestamp: pullIni.mergeTimestamp,
|
|
purseAmount: pullIni.contractTerms.amount,
|
|
purseExpiration: purseExpiration,
|
|
purseFee: purseFee,
|
|
pursePriv: pullIni.pursePriv,
|
|
pursePub: pullIni.pursePub,
|
|
reservePayto,
|
|
reservePriv: mergeReserve.reservePriv,
|
|
});
|
|
|
|
const reservePurseReqBody: ExchangeReservePurseRequest = {
|
|
merge_sig: sigRes.mergeSig,
|
|
merge_timestamp: pullIni.mergeTimestamp,
|
|
h_contract_terms: pullIni.contractTermsHash,
|
|
merge_pub: pullIni.mergePub,
|
|
min_age: 0,
|
|
purse_expiration: purseExpiration,
|
|
purse_fee: purseFee,
|
|
purse_pub: pullIni.pursePub,
|
|
purse_sig: sigRes.purseSig,
|
|
purse_value: pullIni.contractTerms.amount,
|
|
reserve_sig: sigRes.accountSig,
|
|
econtract: econtractResp.econtract,
|
|
};
|
|
|
|
logger.info(`reserve purse request: ${j2s(reservePurseReqBody)}`);
|
|
|
|
const reservePurseMergeUrl = new URL(
|
|
`reserves/${mergeReserve.reservePub}/purse`,
|
|
pullIni.exchangeBaseUrl,
|
|
);
|
|
|
|
const httpResp = await ws.http.postJson(
|
|
reservePurseMergeUrl.href,
|
|
reservePurseReqBody,
|
|
);
|
|
|
|
if (httpResp.status === HttpStatusCode.UnavailableForLegalReasons) {
|
|
const respJson = await httpResp.json();
|
|
const kycPending = codecForWalletKycUuid().decode(respJson);
|
|
logger.info(`kyc uuid response: ${j2s(kycPending)}`);
|
|
|
|
await ws.db
|
|
.mktx((x) => [x.peerPullPaymentInitiations])
|
|
.runReadWrite(async (tx) => {
|
|
const peerIni = await tx.peerPullPaymentInitiations.get(pursePub);
|
|
if (!peerIni) {
|
|
return;
|
|
}
|
|
peerIni.kycInfo = {
|
|
paytoHash: kycPending.h_payto,
|
|
requirementRow: kycPending.requirement_row,
|
|
};
|
|
peerIni.status = PeerPullPaymentInitiationStatus.KycRequired;
|
|
await tx.peerPullPaymentInitiations.put(peerIni);
|
|
});
|
|
return {
|
|
type: OperationAttemptResultType.Pending,
|
|
result: undefined,
|
|
};
|
|
}
|
|
|
|
const resp = await readSuccessResponseJsonOrThrow(httpResp, codecForAny());
|
|
|
|
logger.info(`reserve merge response: ${j2s(resp)}`);
|
|
|
|
await ws.db
|
|
.mktx((x) => [x.peerPullPaymentInitiations])
|
|
.runReadWrite(async (tx) => {
|
|
const pi2 = await tx.peerPullPaymentInitiations.get(pursePub);
|
|
if (!pi2) {
|
|
return;
|
|
}
|
|
pi2.status = PeerPullPaymentInitiationStatus.PurseCreated;
|
|
await tx.peerPullPaymentInitiations.put(pi2);
|
|
});
|
|
|
|
ws.notify({
|
|
type: NotificationType.PeerPullCreditReady,
|
|
transactionId: constructTransactionIdentifier({
|
|
tag: TransactionType.PeerPullCredit,
|
|
pursePub: pullIni.pursePub,
|
|
}),
|
|
});
|
|
|
|
return {
|
|
type: OperationAttemptResultType.Finished,
|
|
result: undefined,
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Find a preferred exchange based on when we withdrew last from this exchange.
|
|
*/
|
|
async function getPreferredExchangeForCurrency(
|
|
ws: InternalWalletState,
|
|
currency: string,
|
|
): Promise<string | undefined> {
|
|
// Find an exchange with the matching currency.
|
|
// Prefer exchanges with the most recent withdrawal.
|
|
const url = await ws.db
|
|
.mktx((x) => [x.exchanges])
|
|
.runReadOnly(async (tx) => {
|
|
const exchanges = await tx.exchanges.iter().toArray();
|
|
let candidate = undefined;
|
|
for (const e of exchanges) {
|
|
if (e.detailsPointer?.currency !== currency) {
|
|
continue;
|
|
}
|
|
if (!candidate) {
|
|
candidate = e;
|
|
continue;
|
|
}
|
|
if (candidate.lastWithdrawal && !e.lastWithdrawal) {
|
|
continue;
|
|
}
|
|
if (candidate.lastWithdrawal && e.lastWithdrawal) {
|
|
if (
|
|
AbsoluteTime.cmp(
|
|
AbsoluteTime.fromTimestamp(e.lastWithdrawal),
|
|
AbsoluteTime.fromTimestamp(candidate.lastWithdrawal),
|
|
) > 0
|
|
) {
|
|
candidate = e;
|
|
}
|
|
}
|
|
}
|
|
if (candidate) {
|
|
return candidate.baseUrl;
|
|
}
|
|
return undefined;
|
|
});
|
|
return url;
|
|
}
|
|
|
|
/**
|
|
* Check fees and available exchanges for a peer push payment initiation.
|
|
*/
|
|
export async function checkPeerPullPaymentInitiation(
|
|
ws: InternalWalletState,
|
|
req: CheckPeerPullCreditRequest,
|
|
): Promise<CheckPeerPullCreditResponse> {
|
|
// FIXME: We don't support exchanges with purse fees yet.
|
|
// Select an exchange where we have money in the specified currency
|
|
// FIXME: How do we handle regional currency scopes here? Is it an additional input?
|
|
|
|
logger.trace("checking peer-pull-credit fees");
|
|
|
|
const currency = Amounts.currencyOf(req.amount);
|
|
let exchangeUrl;
|
|
if (req.exchangeBaseUrl) {
|
|
exchangeUrl = req.exchangeBaseUrl;
|
|
} else {
|
|
exchangeUrl = await getPreferredExchangeForCurrency(ws, currency);
|
|
}
|
|
|
|
if (!exchangeUrl) {
|
|
throw Error("no exchange found for initiating a peer pull payment");
|
|
}
|
|
|
|
logger.trace(`found ${exchangeUrl} as preferred exchange`);
|
|
|
|
const wi = await getExchangeWithdrawalInfo(
|
|
ws,
|
|
exchangeUrl,
|
|
Amounts.parseOrThrow(req.amount),
|
|
undefined,
|
|
);
|
|
|
|
logger.trace(`got withdrawal info`);
|
|
|
|
return {
|
|
exchangeBaseUrl: exchangeUrl,
|
|
amountEffective: wi.withdrawalAmountEffective,
|
|
amountRaw: req.amount,
|
|
};
|
|
}
|
|
|
|
/**
|
|
* Initiate a peer pull payment.
|
|
*/
|
|
export async function initiatePeerPullPayment(
|
|
ws: InternalWalletState,
|
|
req: InitiatePeerPullCreditRequest,
|
|
): Promise<InitiatePeerPullCreditResponse> {
|
|
const currency = Amounts.currencyOf(req.partialContractTerms.amount);
|
|
let maybeExchangeBaseUrl: string | undefined;
|
|
if (req.exchangeBaseUrl) {
|
|
maybeExchangeBaseUrl = req.exchangeBaseUrl;
|
|
} else {
|
|
maybeExchangeBaseUrl = await getPreferredExchangeForCurrency(ws, currency);
|
|
}
|
|
|
|
if (!maybeExchangeBaseUrl) {
|
|
throw Error("no exchange found for initiating a peer pull payment");
|
|
}
|
|
|
|
const exchangeBaseUrl = maybeExchangeBaseUrl;
|
|
|
|
await updateExchangeFromUrl(ws, exchangeBaseUrl);
|
|
|
|
const mergeReserveInfo = await getMergeReserveInfo(ws, {
|
|
exchangeBaseUrl: exchangeBaseUrl,
|
|
});
|
|
|
|
const mergeTimestamp = TalerProtocolTimestamp.now();
|
|
|
|
const pursePair = await ws.cryptoApi.createEddsaKeypair({});
|
|
const mergePair = await ws.cryptoApi.createEddsaKeypair({});
|
|
|
|
const contractTerms = req.partialContractTerms;
|
|
|
|
const hContractTerms = ContractTermsUtil.hashContractTerms(contractTerms);
|
|
|
|
const contractKeyPair = await ws.cryptoApi.createEddsaKeypair({});
|
|
|
|
const withdrawalGroupId = encodeCrock(getRandomBytes(32));
|
|
|
|
const mergeReserveRowId = mergeReserveInfo.rowId;
|
|
checkDbInvariant(!!mergeReserveRowId);
|
|
|
|
const wi = await getExchangeWithdrawalInfo(
|
|
ws,
|
|
exchangeBaseUrl,
|
|
Amounts.parseOrThrow(req.partialContractTerms.amount),
|
|
undefined,
|
|
);
|
|
|
|
await ws.db
|
|
.mktx((x) => [x.peerPullPaymentInitiations, x.contractTerms])
|
|
.runReadWrite(async (tx) => {
|
|
await tx.peerPullPaymentInitiations.put({
|
|
amount: req.partialContractTerms.amount,
|
|
contractTermsHash: hContractTerms,
|
|
exchangeBaseUrl: exchangeBaseUrl,
|
|
pursePriv: pursePair.priv,
|
|
pursePub: pursePair.pub,
|
|
mergePriv: mergePair.priv,
|
|
mergePub: mergePair.pub,
|
|
status: PeerPullPaymentInitiationStatus.Initial,
|
|
contractTerms: contractTerms,
|
|
mergeTimestamp,
|
|
mergeReserveRowId: mergeReserveRowId,
|
|
contractPriv: contractKeyPair.priv,
|
|
contractPub: contractKeyPair.pub,
|
|
withdrawalGroupId,
|
|
estimatedAmountEffective: wi.withdrawalAmountEffective,
|
|
});
|
|
await tx.contractTerms.put({
|
|
contractTermsRaw: contractTerms,
|
|
h: hContractTerms,
|
|
});
|
|
});
|
|
|
|
// FIXME: Should we somehow signal to the client
|
|
// whether purse creation has failed, or does the client/
|
|
// check this asynchronously from the transaction status?
|
|
|
|
const taskId = constructTaskIdentifier({
|
|
tag: PendingTaskType.PeerPullInitiation,
|
|
pursePub: pursePair.pub,
|
|
});
|
|
|
|
await runOperationWithErrorReporting(ws, taskId, async () => {
|
|
return processPeerPullCredit(ws, pursePair.pub);
|
|
});
|
|
|
|
return {
|
|
talerUri: constructPayPullUri({
|
|
exchangeBaseUrl: exchangeBaseUrl,
|
|
contractPriv: contractKeyPair.priv,
|
|
}),
|
|
transactionId: makeTransactionId(
|
|
TransactionType.PeerPullCredit,
|
|
pursePair.pub,
|
|
),
|
|
};
|
|
}
|