wallet-core/extension/background/emscriptif.js

/*

  This file is part of TALER
  Copyright (C) 2014, 2015 Christian Grothoff (and other contributing authors)

  TALER is free software; you can redistribute it and/or modify it under the
  terms of the GNU General Public License as published by the Free Software
  Foundation; either version 3, or (at your option) any later version.

  TALER is distributed in the hope that it will be useful, but WITHOUT ANY
  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
  A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

  You should have received a copy of the GNU General Public License along with
  TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
"use strict";
// Size of a native pointer.
const PTR_SIZE = 4;
let getEmsc = Module.cwrap;
var emsc = {
    free: (ptr) => Module._free(ptr),
    get_value: getEmsc('TALER_WR_get_value', 'number', ['number']),
    get_fraction: getEmsc('TALER_WR_get_fraction', 'number', ['number']),
    get_currency: getEmsc('TALER_WR_get_currency', 'string', ['number']),
    amount_add: getEmsc('TALER_amount_add', 'void', ['number', 'number', 'number']),
    amount_subtract: getEmsc('TALER_amount_subtract', 'void', ['number', 'number', 'number']),
    amount_normalize: getEmsc('TALER_amount_normalize', 'void', ['number']),
    amount_cmp: getEmsc('TALER_amount_cmp', 'number', ['number', 'number'])
};
var emscAlloc = {
    get_amount: getEmsc('TALER_WRALL_get_amount', 'number', ['number', 'number', 'number', 'string']),
    eddsa_key_create: getEmsc('GNUNET_CRYPTO_eddsa_key_create', 'number'),
    eddsa_public_key_from_private: getEmsc('TALER_WRALL_eddsa_public_key_from_private', 'number', ['number']),
    data_to_string_alloc: getEmsc('GNUNET_STRINGS_data_to_string_alloc', 'number', ['number', 'number']),
    malloc: (size) => Module._malloc(size),
};
class ArenaObject {
    constructor(arena) {
        this.nativePtr = 0;
        if (!arena)
            arena = defaultArena;
        arena.put(this);
        this.arena = arena;
    }
}
class Arena {
    constructor() {
        this.heap = [];
    }
    put(obj) {
        this.heap.push(obj);
    }
    destroy(obj) {
        // XXX: todo
    }
}
// Arena to track allocations that do not use an explicit arena.
var defaultArena = new Arena();
class Amount extends ArenaObject {
    constructor(args, arena) {
        super(arena);
        if (args) {
            this.nativePtr = emscAlloc.get_amount(args.value, 0, args.fraction, args.currency);
        }
        else {
            this.nativePtr = emscAlloc.get_amount(0, 0, 0, "");
        }
    }
    destroy() {
        if (this.nativePtr != 0) {
            emsc.free(this.nativePtr);
        }
    }
    get value() {
        return emsc.get_value(this.nativePtr);
    }
    get fraction() {
        return emsc.get_fraction(this.nativePtr);
    }
    get currency() {
        return emsc.get_currency(this.nativePtr);
    }
    toJson() {
        return {
            value: emsc.get_value(this.nativePtr),
            fraction: emsc.get_fraction(this.nativePtr),
            currency: emsc.get_currency(this.nativePtr)
        };
    }
    /**
     * Add an amount to this amount.
     */
    add(a) {
        let res = emsc.amount_add(this.nativePtr, a.nativePtr, this.nativePtr);
        if (res < 1) {
            // Overflow
            return false;
        }
        return true;
    }
    /**
     * Perform saturating subtraction on amounts.
     */
    sub(a) {
        let res = emsc.amount_subtract(this.nativePtr, a.nativePtr, this.nativePtr);
        if (res == 0) {
            // Underflow
            return false;
        }
        if (res > 0) {
            return true;
        }
        throw "Incompatible currencies";
    }
    cmp(a) {
        return emsc.amount_cmp(this.nativePtr, a.nativePtr);
    }
    normalize() {
        emsc.amount_normalize(this.nativePtr);
    }
}
class SizedArenaObject extends ArenaObject {
    encode() {
        var d = emscAlloc.data_to_string_alloc(this.nativePtr, this.size);
        var s = Module.Pointer_stringify(d);
        emsc.free(d);
        return s;
    }
}
class EddsaPrivateKey extends SizedArenaObject {
    static create(a) {
        let k = new EddsaPrivateKey(a);
        k.nativePtr = emscAlloc.eddsa_key_create();
        return k;
    }
    get size() {
        return 32;
    }
    destroy() {
        // TODO
    }
    getPublicKey() {
        let pk = new EddsaPublicKey(this.arena);
        pk.nativePtr = emscAlloc.eddsa_public_key_from_private(this.nativePtr);
        return pk;
    }
}
class EddsaPublicKey extends SizedArenaObject {
    destroy() {
        // TODO
    }
    get size() {
        return 32;
    }
}
class RsaBlindingKey extends ArenaObject {
    destroy() {
        // TODO
    }
}
class HashCode extends ArenaObject {
    destroy() {
        // TODO
    }
}
class ByteArray extends ArenaObject {
    destroy() {
        // TODO
    }
}
class RsaPublicKey extends ArenaObject {
    destroy() {
        // TODO
    }
}
function rsaBlind(hashCode, blindingKey, pkey, arena) {
    return null;
}