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/*
This file is part of GNU Taler
(C) 2019 Taler Systems S.A.
GNU 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.
GNU 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
GNU Taler; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
*/
import { AmountJson } from "."
import { Amounts, } from "./amounts"
import { getRandomBytes, decodeCrock, encodeCrock } from "./talerCrypto"
import * as segwit from "./segwit_addr"
/**
*
* @author sebasjm
*/
export interface SegwitAddrs {
segwitAddr1: string,
segwitAddr2: string,
}
function buf2hex(buffer: Uint8Array) { // buffer is an ArrayBuffer
return [...new Uint8Array(buffer)]
.map(x => x.toString(16).padStart(2, '0'))
.join('');
}
export function generateFakeSegwitAddress(reservePub: string, addr: string): SegwitAddrs {
const pub = decodeCrock(reservePub)
const first_rnd = getRandomBytes(4)
const second_rnd = new Uint8Array(first_rnd.length)
second_rnd.set(first_rnd)
first_rnd[0] = first_rnd[0] & 0b0111_1111
second_rnd[0] = second_rnd[0] | 0b1000_0000
const first_part = new Uint8Array(first_rnd.length + pub.length / 2)
first_part.set(first_rnd, 0)
first_part.set(pub.subarray(0, 16), 4)
const second_part = new Uint8Array(first_rnd.length + pub.length / 2)
second_part.set(first_rnd, 0)
second_part.set(pub.subarray(16), 4)
console.log(first_part.length, second_part.length)
const prefix = (addr[0] === 't' && addr[1] == 'b') ? "tb" : (addr[0] === 'b' && addr[1] == 'c' && addr[2] === 'r' && addr[3] == 't') ? 'bcrt' : (addr[0] === 'b' && addr[1] == 'c') ? 'bc' : undefined
if (prefix === undefined) throw new Error('unknown bitcoin net')
return {
segwitAddr1: segwit.default.encode(prefix, 0, first_part),
segwitAddr2: segwit.default.encode(prefix, 0, second_part),
}
}
// https://github.com/bitcoin/bitcoin/blob/master/src/policy/policy.cpp
export function segwitMinAmount(): AmountJson {
return Amounts.parseOrThrow("BTC:0.00000294")
}
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