Merge pull request #1747 from bitcoinjs/tests/taproot

Add taproot test with new CJS compatible tiny-secp256k1
This commit is contained in:
Jonathan Underwood 2021-11-17 18:51:56 +09:00 committed by GitHub
commit ac411e241b
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7 changed files with 167 additions and 20 deletions

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@ -41,7 +41,7 @@ jobs:
runs-on: ubuntu-latest
services:
regtest:
image: junderw/bitcoinjs-regtest-server@sha256:a46ec1a651ca5b1a5408f2b2526ea5f435421dd2bc2f28fae3bc33e1fd614552
image: junderw/bitcoinjs-regtest-server@sha256:5b69cf95d9edf6d5b3a00504665d6b3c382a6aa3728fe8ce897974c519061463
ports:
- 8080:8080
steps:

46
package-lock.json generated
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@ -556,16 +556,15 @@
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"dev": true,
"requires": {
"@types/node": "10.12.18",
"bs58check": "^2.1.1",
"create-hash": "^1.2.0",
"create-hmac": "^1.1.7",
"tiny-secp256k1": "^1.1.3",
"typeforce": "^1.11.5",
"wif": "^2.0.6"
},
@ -941,6 +940,21 @@
"tiny-secp256k1": "^1.1.6",
"typeforce": "^1.11.3",
"wif": "^2.0.1"
},
"dependencies": {
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"requires": {
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"bn.js": "^4.11.8",
"create-hmac": "^1.1.7",
"elliptic": "^6.4.0",
"nan": "^2.13.2"
}
}
}
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@ -1707,9 +1721,9 @@
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"dev": true
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@ -2465,16 +2479,12 @@
}
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"dev": true,
"requires": {
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"bn.js": "^4.11.8",
"create-hmac": "^1.1.7",
"elliptic": "^6.4.0",
"nan": "^2.13.2"
"uint8array-tools": "0.0.6"
}
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@ -2583,6 +2593,12 @@
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"uuid": {
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"resolved": "https://registry.npmjs.org/uuid/-/uuid-3.4.0.tgz",

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@ -66,7 +66,7 @@
"@types/proxyquire": "^1.3.28",
"@types/randombytes": "^2.0.0",
"@types/wif": "^2.0.2",
"bip32": "^2.0.6",
"bip32": "^3.0.1",
"bip39": "^3.0.2",
"bip65": "^1.0.1",
"bip68": "^1.0.3",
@ -84,6 +84,7 @@
"randombytes": "^2.1.0",
"regtest-client": "0.2.0",
"rimraf": "^2.6.3",
"tiny-secp256k1": "^2.1.1",
"ts-node": "^8.3.0",
"tslint": "^6.1.3",
"typescript": "^4.4.4"

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@ -1,9 +1,12 @@
import * as assert from 'assert';
import * as bip32 from 'bip32';
import BIP32Factory from 'bip32';
import * as ecc from 'tiny-secp256k1';
import * as bip39 from 'bip39';
import { describe, it } from 'mocha';
import * as bitcoin from '../..';
const bip32 = BIP32Factory(ecc);
function getAddress(node: any, network?: any): string {
return bitcoin.payments.p2pkh({ pubkey: node.publicKey, network }).address!;
}

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@ -0,0 +1,122 @@
import BIP32Factory from 'bip32';
import * as ecc from 'tiny-secp256k1';
import { describe, it } from 'mocha';
import * as bitcoin from '../..';
import { regtestUtils } from './_regtest';
const rng = require('randombytes');
const regtest = regtestUtils.network;
const bip32 = BIP32Factory(ecc);
describe('bitcoinjs-lib (transaction with taproot)', () => {
it('can create (and broadcast via 3PBP) a taproot keyspend Transaction', async () => {
const myKey = bip32.fromSeed(rng(64), regtest);
const output = createKeySpendOutput(myKey.publicKey);
const address = bitcoin.address.fromOutputScript(output, regtest);
// amount from faucet
const amount = 42e4;
// amount to send
const sendAmount = amount - 1e4;
// get faucet
const unspent = await regtestUtils.faucetComplex(output, amount);
const tx = createSigned(
myKey,
unspent.txId,
unspent.vout,
sendAmount,
[output],
[amount],
);
const hex = tx.toHex();
// console.log('Valid tx sent from:');
// console.log(address);
// console.log('tx hex:');
// console.log(hex);
await regtestUtils.broadcast(hex);
await regtestUtils.verify({
txId: tx.getId(),
address,
vout: 0,
value: sendAmount,
});
});
});
// Order of the curve (N) - 1
const N_LESS_1 = Buffer.from(
'fffffffffffffffffffffffffffffffebaaedce6af48a03bbfd25e8cd0364140',
'hex',
);
// 1 represented as 32 bytes BE
const ONE = Buffer.from(
'0000000000000000000000000000000000000000000000000000000000000001',
'hex',
);
// Function for creating a tweaked p2tr key-spend only address
// (This is recommended by BIP341)
function createKeySpendOutput(publicKey: Buffer): Buffer {
// x-only pubkey (remove 1 byte y parity)
const myXOnlyPubkey = publicKey.slice(1, 33);
const commitHash = bitcoin.crypto.taggedHash('TapTweak', myXOnlyPubkey);
const tweakResult = ecc.xOnlyPointAddTweak(myXOnlyPubkey, commitHash);
if (tweakResult === null) throw new Error('Invalid Tweak');
const { xOnlyPubkey: tweaked } = tweakResult;
// scriptPubkey
return Buffer.concat([
// witness v1, PUSH_DATA 32 bytes
Buffer.from([0x51, 0x20]),
// x-only tweaked pubkey
tweaked,
]);
}
// Function for signing for a tweaked p2tr key-spend only address
// (Required for the above address)
interface KeyPair {
publicKey: Buffer;
privateKey?: Buffer;
}
function signTweaked(messageHash: Buffer, key: KeyPair): Uint8Array {
const privateKey =
key.publicKey[0] === 2
? key.privateKey
: ecc.privateAdd(ecc.privateSub(N_LESS_1, key.privateKey!)!, ONE)!;
const tweakHash = bitcoin.crypto.taggedHash(
'TapTweak',
key.publicKey.slice(1, 33),
);
const newPrivateKey = ecc.privateAdd(privateKey!, tweakHash);
if (newPrivateKey === null) throw new Error('Invalid Tweak');
return ecc.signSchnorr(messageHash, newPrivateKey, Buffer.alloc(32));
}
// Function for creating signed tx
function createSigned(
key: KeyPair,
txid: string,
vout: number,
amountToSend: number,
scriptPubkeys: Buffer[],
values: number[],
): bitcoin.Transaction {
const tx = new bitcoin.Transaction();
tx.version = 2;
// Add input
tx.addInput(Buffer.from(txid, 'hex').reverse(), vout);
// Add output
tx.addOutput(scriptPubkeys[0], amountToSend);
const sighash = tx.hashForWitnessV1(
0, // which input
scriptPubkeys, // All previous outputs of all inputs
values, // All previous values of all inputs
bitcoin.Transaction.SIGHASH_DEFAULT, // sighash flag, DEFAULT is schnorr-only (DEFAULT == ALL)
);
const signature = Buffer.from(signTweaked(sighash, key));
// witness stack for keypath spend is just the signature.
// If sighash is not SIGHASH_DEFAULT (ALL) then you must add 1 byte with sighash value
tx.ins[0].witness = [signature];
return tx;
}

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@ -1,11 +1,13 @@
import * as assert from 'assert';
import * as bip32 from 'bip32';
import BIP32Factory from 'bip32';
import * as ecc from 'tiny-secp256k1';
import { ECPair } from 'ecpair';
import { describe, it } from 'mocha';
import * as bitcoin from '../..';
import { regtestUtils } from './_regtest';
const rng = require('randombytes');
const regtest = regtestUtils.network;
const bip32 = BIP32Factory(ecc);
const validator = (
pubkey: Buffer,

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@ -1,9 +1,12 @@
import * as assert from 'assert';
import * as bip32 from 'bip32';
import BIP32Factory from 'bip32';
import * as ecc from 'tiny-secp256k1';
import * as crypto from 'crypto';
import { ECPair } from 'ecpair';
import { describe, it } from 'mocha';
const bip32 = BIP32Factory(ecc);
import { networks as NETWORKS, payments, Psbt, Signer, SignerAsync } from '..';
import * as preFixtures from './fixtures/psbt.json';