diff options
Diffstat (limited to 'packages/taler-util')
-rw-r--r-- | packages/taler-util/package.json | 1 | ||||
-rw-r--r-- | packages/taler-util/src/bitcoin.ts | 63 | ||||
-rw-r--r-- | packages/taler-util/src/index.ts | 1 |
3 files changed, 65 insertions, 0 deletions
diff --git a/packages/taler-util/package.json b/packages/taler-util/package.json index 6a46de897..b1edbaf83 100644 --- a/packages/taler-util/package.json +++ b/packages/taler-util/package.json @@ -40,6 +40,7 @@ "typescript": "^4.5.5" }, "dependencies": { + "bech32-buffer": "^0.2.0", "big-integer": "^1.6.51", "jed": "^1.1.1", "tslib": "^2.3.1" diff --git a/packages/taler-util/src/bitcoin.ts b/packages/taler-util/src/bitcoin.ts new file mode 100644 index 000000000..dd90f514e --- /dev/null +++ b/packages/taler-util/src/bitcoin.ts @@ -0,0 +1,63 @@ +/* + 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 { encode as segwitEncode } from "bech32-buffer" +/** + * + * @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 generateSegwitAddress(reservePub: 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, 32), 4) + + return { + segwitAddr1: segwitEncode("bc", first_part), + segwitAddr2: segwitEncode("bc", second_part), + } +} + +// https://github.com/bitcoin/bitcoin/blob/master/src/policy/policy.cpp +export function segwitMinAmount(): AmountJson { + return Amounts.parseOrThrow("BTC:0.00000294") +}
\ No newline at end of file diff --git a/packages/taler-util/src/index.ts b/packages/taler-util/src/index.ts index c42e5e66a..0141be13b 100644 --- a/packages/taler-util/src/index.ts +++ b/packages/taler-util/src/index.ts @@ -23,6 +23,7 @@ export { fnutil } from "./fnutils.js"; export * from "./kdf.js"; export * from "./talerCrypto.js"; export * from "./http-status-codes.js"; +export * from "./bitcoin.js"; export { randomBytes, secretbox, |