88 lines
2.6 KiB
TypeScript
88 lines
2.6 KiB
TypeScript
/*
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This file is part of GNU Taler
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(C) 2019 Taler Systems S.A.
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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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*
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* @author sebasjm
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*/
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/**
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* Imports.
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*/
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import { AmountJson, Amounts } from "./amounts.js";
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import { decodeCrock } from "./taler-crypto.js";
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import * as segwit from "./segwit_addr.js";
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function buf2hex(buffer: Uint8Array) {
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// buffer is an ArrayBuffer
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return [...new Uint8Array(buffer)]
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.map((x) => x.toString(16).padStart(2, "0"))
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.join("");
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}
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const hext2buf = (hexString: string) =>
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new Uint8Array(hexString.match(/.{1,2}/g)!.map((byte) => parseInt(byte, 16)));
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export function generateFakeSegwitAddress(
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reservePub: string | undefined,
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addr: string,
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): string[] {
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if (!reservePub) return [];
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let pub;
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try {
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pub = decodeCrock(reservePub);
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} catch {
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// pub = new Uint8Array(0)
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}
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if (!pub || pub.length !== 32) return [];
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const first_rnd = new Uint8Array(4);
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first_rnd.set(pub.subarray(0, 4));
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const second_rnd = new Uint8Array(4);
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second_rnd.set(pub.subarray(0, 4));
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first_rnd[0] = first_rnd[0] & 0b0111_1111;
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second_rnd[0] = second_rnd[0] | 0b1000_0000;
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const first_part = new Uint8Array(first_rnd.length + pub.length / 2);
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first_part.set(first_rnd, 0);
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first_part.set(pub.subarray(0, 16), 4);
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const second_part = new Uint8Array(first_rnd.length + pub.length / 2);
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second_part.set(second_rnd, 0);
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second_part.set(pub.subarray(16, 32), 4);
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const prefix =
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addr[0] === "t" && addr[1] == "b"
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? "tb"
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: addr[0] === "b" && addr[1] == "c" && addr[2] === "r" && addr[3] == "t"
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? "bcrt"
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: addr[0] === "b" && addr[1] == "c"
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? "bc"
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: undefined;
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if (prefix === undefined) throw new Error("unknown bitcoin net");
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const addr1 = segwit.default.encode(prefix, 0, first_part);
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const addr2 = segwit.default.encode(prefix, 0, second_part);
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return [addr1, addr2];
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}
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// https://github.com/bitcoin/bitcoin/blob/master/src/policy/policy.cpp
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export function segwitMinAmount(currency: string): AmountJson {
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return Amounts.parseOrThrow(`${currency}:0.00000294`);
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}
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