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feat(LN): Add methods to create transaction scripts
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,265 @@ | ||
| import * as SCRIPT from 'bitcoinjs-lib/src/script' | ||
| import * as hash from 'bcoin/lib/crypto/digest' | ||
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| import * as OPS from 'bitcoin-ops' | ||
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| import Long from 'long' | ||
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| let OP_CSV = 178 | ||
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| let intTo48BigNum = (num) => { | ||
| let l = new Long(num) | ||
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| let b = Buffer.alloc(8) | ||
| b.writeInt32BE(l.hi, 0) | ||
| b.writeInt32BE(l.low, 4) | ||
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| return b.slice(3) | ||
| } | ||
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| let intToNum = (num) => { | ||
| let b = null | ||
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| if (num < 65536) { | ||
| b = Buffer.alloc(2) | ||
| b.writeInt16LE(num) | ||
| } else if (num < 4294967296) { | ||
| b = Buffer.alloc(4) | ||
| b.writeInt32LE(num) | ||
| } else { | ||
| throw new Error('Number too big: ' + num) | ||
| } | ||
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| return b | ||
| } | ||
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| export let getFundingOutputScript = (fundingKeyLocal, fundingKeyRemote) => { | ||
| // 2 <key1> <key2> 2 OP_CHECKMULTISIG | ||
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| let chunks = [] | ||
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| chunks.push(OPS.OP_2) | ||
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| if (Buffer.compare(fundingKeyLocal, fundingKeyRemote) < 0) { | ||
| chunks.push(fundingKeyLocal) | ||
| chunks.push(fundingKeyRemote) | ||
| } else { | ||
| chunks.push(fundingKeyRemote) | ||
| chunks.push(fundingKeyLocal) | ||
| } | ||
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| chunks.push(OPS.OP_2) | ||
| chunks.push(OPS.OP_CHECKMULTISIG) | ||
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| return SCRIPT.compile(chunks) | ||
| } | ||
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| export let getToLocalOutputScript = (revocationKey, toSelfDelay, localDelayedKey) => { | ||
| // OP_IF | ||
| // # Penalty transaction | ||
| // <revocationkey> | ||
| // OP_ELSE | ||
| // `to_self_delay` | ||
| // OP_CSV | ||
| // OP_DROP | ||
| // <local_delayedkey> | ||
| // OP_ENDIF | ||
| // OP_CHECKSIG | ||
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| let chunks = [] | ||
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| chunks.push(OPS.OP_IF) | ||
| chunks.push(revocationKey) | ||
| chunks.push(OPS.OP_ELSE) | ||
| chunks.push(intToNum(toSelfDelay)) | ||
| chunks.push(OP_CSV) | ||
| chunks.push(OPS.OP_DROP) | ||
| chunks.push(localDelayedKey) | ||
| chunks.push(OPS.OP_ENDIF) | ||
| chunks.push(OPS.OP_CHECKSIG) | ||
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| return SCRIPT.compile(chunks) | ||
| } | ||
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| export let getToRemoteOutputScript = (remoteKey) => { | ||
| // This output sends funds to the other peer, thus is a simple P2WPKH to remotekey. | ||
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| let chunks = [] | ||
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| let sha = hash.sha256(remoteKey) | ||
| let rip = hash.ripemd160(sha) | ||
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| chunks.push(OPS.OP_0) | ||
| chunks.push(rip) | ||
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| return SCRIPT.compile(chunks) | ||
| } | ||
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| export let hash160 = (data) => { | ||
| let sha = hash.sha256(data) | ||
| return hash.ripemd160(sha) | ||
| } | ||
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| export let getOfferedHTLCOutput = (revocationKey, remoteKey, localKey, paymentHash) => { | ||
| // # To you with revocation key | ||
| // OP_DUP OP_HASH160 <RIPEMD160(SHA256(revocationkey))> OP_EQUAL | ||
| // OP_IF | ||
| // OP_CHECKSIG | ||
| // OP_ELSE | ||
| // <remotekey> OP_SWAP OP_SIZE 32 OP_EQUAL | ||
| // OP_NOTIF | ||
| // # To me via HTLC-timeout transaction (timelocked). | ||
| // OP_DROP 2 OP_SWAP <localkey> 2 OP_CHECKMULTISIG | ||
| // OP_ELSE | ||
| // # To you with preimage. | ||
| // OP_HASH160 <RIPEMD160(payment_hash)> OP_EQUALVERIFY | ||
| // OP_CHECKSIG | ||
| // OP_ENDIF | ||
| // OP_ENDIF | ||
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| let chunks = [] | ||
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| chunks.push(OPS.OP_DUP) | ||
| chunks.push(OPS.OP_HASH160) | ||
| chunks.push(hash160(revocationKey)) | ||
| chunks.push(OPS.OP_EQUAL) | ||
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| chunks.push(OPS.OP_IF) | ||
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| chunks.push(OPS.OP_CHECKSIG) | ||
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| chunks.push(OPS.OP_ELSE) | ||
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| chunks.push(remoteKey) | ||
| chunks.push(OPS.OP_SWAP) | ||
| chunks.push(OPS.OP_SIZE) | ||
| chunks.push(Buffer.from('20', 'hex')) // Push <32> onto the stack | ||
| chunks.push(OPS.OP_EQUAL) | ||
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| chunks.push(OPS.OP_NOTIF) | ||
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| chunks.push(OPS.OP_DROP) | ||
| chunks.push(OPS.OP_2) | ||
| chunks.push(OPS.OP_SWAP) | ||
| chunks.push(localKey) | ||
| chunks.push(OPS.OP_2) | ||
| chunks.push(OPS.OP_CHECKMULTISIG) | ||
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| chunks.push(OPS.OP_ELSE) | ||
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| chunks.push(OPS.OP_HASH160) | ||
| chunks.push(paymentHash) | ||
| chunks.push(OPS.OP_EQUALVERIFY) | ||
| chunks.push(OPS.OP_CHECKSIG) | ||
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| chunks.push(OPS.OP_ENDIF) | ||
| chunks.push(OPS.OP_ENDIF) | ||
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| return SCRIPT.compile(chunks) | ||
| } | ||
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| export let getReceivedHTLCOutput = (revocationKey, remoteKey, localKey, paymentHash, cltvExpiry) => { | ||
| // # To you with revocation key | ||
| // OP_DUP OP_HASH160 <RIPEMD160(SHA256(revocationkey))> OP_EQUAL | ||
| // OP_IF | ||
| // OP_CHECKSIG | ||
| // OP_ELSE | ||
| // <remotekey> OP_SWAP | ||
| // OP_SIZE 32 OP_EQUAL | ||
| // OP_IF | ||
| // # To me via HTLC-success transaction. | ||
| // OP_HASH160 <RIPEMD160(payment_hash)> OP_EQUALVERIFY | ||
| // 2 OP_SWAP <localkey> 2 OP_CHECKMULTISIG | ||
| // OP_ELSE | ||
| // # To you after timeout. | ||
| // OP_DROP <cltv_expiry> OP_CHECKLOCKTIMEVERIFY OP_DROP | ||
| // OP_CHECKSIG | ||
| // OP_ENDIF | ||
| // OP_ENDIF | ||
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| let chunks = [] | ||
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| chunks.push(OPS.OP_DUP) | ||
| chunks.push(OPS.OP_HASH160) | ||
| chunks.push(hash160(revocationKey)) | ||
| chunks.push(OPS.OP_EQUAL) | ||
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| chunks.push(OPS.OP_IF) | ||
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| chunks.push(OPS.OP_CHECKSIG) | ||
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| chunks.push(OPS.OP_ELSE) | ||
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| chunks.push(remoteKey) | ||
| chunks.push(OPS.OP_SWAP) | ||
| chunks.push(OPS.OP_SIZE) | ||
| chunks.push(Buffer.from('20', 'hex')) // Push <32> onto the stack | ||
| chunks.push(OPS.OP_EQUAL) | ||
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| chunks.push(OPS.OP_IF) | ||
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| chunks.push(OPS.OP_HASH160) | ||
| chunks.push(paymentHash) | ||
| chunks.push(OPS.OP_EQUALVERIFY) | ||
| chunks.push(OPS.OP_2) | ||
| chunks.push(OPS.OP_SWAP) | ||
| chunks.push(localKey) | ||
| chunks.push(OPS.OP_2) | ||
| chunks.push(OPS.OP_CHECKMULTISIG) | ||
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| chunks.push(OPS.OP_ELSE) | ||
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| chunks.push(OPS.OP_DROP) | ||
| chunks.push(intToNum(cltvExpiry)) | ||
| chunks.push(OPS.OP_CHECKLOCKTIMEVERIFY) | ||
| chunks.push(OPS.OP_DROP) | ||
| chunks.push(OPS.OP_CHECKSIG) | ||
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| chunks.push(OPS.OP_ENDIF) | ||
| chunks.push(OPS.OP_ENDIF) | ||
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| return SCRIPT.compile(chunks) | ||
| } | ||
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| export let getHTLCFollowUpTx = (revocationKey, toSelfDelay, delayedKeyLocal) => { | ||
| // OP_IF | ||
| // # Penalty transaction | ||
| // <revocationkey> | ||
| // OP_ELSE | ||
| // `to_self_delay` | ||
| // OP_CSV | ||
| // OP_DROP | ||
| // <local_delayedkey> | ||
| // OP_ENDIF | ||
| // OP_CHECKSIG | ||
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| let chunks = [] | ||
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| chunks.push(OPS.OP_IF) | ||
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| chunks.push(revocationKey) | ||
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| chunks.push(OPS.OP_ELSE) | ||
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| chunks.push(intToNum(toSelfDelay)) | ||
| chunks.push(OP_CSV) | ||
| chunks.push(OPS.OP_DROP) | ||
| chunks.push(delayedKeyLocal) | ||
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| chunks.push(OPS.OP_ENDIF) | ||
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| chunks.push(OPS.OP_CHECKSIG) | ||
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| return SCRIPT.compile(chunks) | ||
| } | ||
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| export let wrapP2WSH = (script) => { | ||
| let sha = hash.sha256(script) | ||
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| let chunks = [] | ||
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| chunks.push(OPS.OP_0) | ||
| chunks.push(sha) | ||
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| return SCRIPT.compile(chunks) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,68 @@ | ||
| import chai from 'chai' | ||
| import * as Script from '../../src/ln/scripts' | ||
| import { map } from 'ramda' | ||
| import { List } from 'immutable-ext' | ||
| import * as Coin from '../../src/coinSelection/coin.js' | ||
| const { expect } = chai | ||
|
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| describe('LN Script Generation', () => { | ||
| describe('Outputs', () => { | ||
| it('FUNDING', () => { | ||
| let fundingKeyLocal = Buffer.from('023da092f6980e58d2c037173180e9a465476026ee50f96695963e8efe436f54eb', 'hex') | ||
| let fundingKeyRemote = Buffer.from('030e9f7b623d2ccc7c9bd44d66d5ce21ce504c0acf6385a132cec6d3c39fa711c1', 'hex') | ||
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| let script = Script.getFundingOutputScript(fundingKeyLocal, fundingKeyRemote) | ||
| let p2wsh = Script.wrapP2WSH(script) | ||
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| expect(p2wsh).to.deep.equal(Buffer.from('0020c015c4a6be010e21657068fc2e6a9d02b27ebe4d490a25846f7237f104d1a3cd', 'hex')) | ||
| }) | ||
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| it('COMMITMENT_LOCAL', () => { | ||
| let delayedKeyLocal = Buffer.from('03fd5960528dc152014952efdb702a88f71e3c1653b2314431701ec77e57fde83c', 'hex') | ||
| let revocationKeyLocal = Buffer.from('0212a140cd0c6539d07cd08dfe09984dec3251ea808b892efeac3ede9402bf2b19', 'hex') | ||
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| let script = Script.getToLocalOutputScript(revocationKeyLocal, 144, delayedKeyLocal) | ||
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| expect(script).to.deep.equal(Buffer.from('63210212a140cd0c6539d07cd08dfe09984dec3251ea808b892efeac3ede9402bf2b1967029000b2752103fd5960528dc152014952efdb702a88f71e3c1653b2314431701ec77e57fde83c68ac', 'hex')) | ||
| }) | ||
| it('COMMITMENT_REMOTE', () => { | ||
| let keyRemote = Buffer.from('0394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b', 'hex') | ||
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| let script = Script.getToRemoteOutputScript(keyRemote) | ||
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| expect(script).to.deep.equal(Buffer.from('0014ccf1af2f2aabee14bb40fa3851ab2301de843110', 'hex')) | ||
| }) | ||
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| it('HTLC_OFFER', () => { | ||
| let keyLocal = Buffer.from('030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e7', 'hex') | ||
| let keyRemote = Buffer.from('0394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b', 'hex') | ||
| let revocationKeyLocal = Buffer.from('0212a140cd0c6539d07cd08dfe09984dec3251ea808b892efeac3ede9402bf2b19', 'hex') | ||
| let paymentHash = Script.hash160(Buffer.from('0202020202020202020202020202020202020202020202020202020202020202', 'hex')) | ||
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| let script = Script.getOfferedHTLCOutput(revocationKeyLocal, keyRemote, keyLocal, paymentHash) | ||
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| expect(script).to.deep.equal(Buffer.from('76a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c820120876475527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae67a914b43e1b38138a41b37f7cd9a1d274bc63e3a9b5d188ac6868', 'hex')) | ||
| }) | ||
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| it('HTLC_RECEIVE', () => { | ||
| let keyLocal = Buffer.from('030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e7', 'hex') | ||
| let keyRemote = Buffer.from('0394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b', 'hex') | ||
| let revocationKeyLocal = Buffer.from('0212a140cd0c6539d07cd08dfe09984dec3251ea808b892efeac3ede9402bf2b19', 'hex') | ||
| let paymentHash = Script.hash160(Buffer.from('0101010101010101010101010101010101010101010101010101010101010101', 'hex')) | ||
|
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| let script = Script.getReceivedHTLCOutput(revocationKeyLocal, keyRemote, keyLocal, paymentHash, 501) | ||
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| expect(script).to.deep.equal(Buffer.from('76a91414011f7254d96b819c76986c277d115efce6f7b58763ac67210394854aa6eab5b2a8122cc726e9dded053a2184d88256816826d6231c068d4a5b7c8201208763a9144b6b2e5444c2639cc0fb7bcea5afba3f3cdce23988527c21030d417a46946384f88d5f3337267c5e579765875dc4daca813e21734b140639e752ae677502f501b175ac6868', 'hex')) | ||
| }) | ||
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| it('HTLC_ACCEPT', () => { | ||
| let revocationKeyLocal = Buffer.from('0212a140cd0c6539d07cd08dfe09984dec3251ea808b892efeac3ede9402bf2b19', 'hex') | ||
| let delayedKeyLocal = Buffer.from('03fd5960528dc152014952efdb702a88f71e3c1653b2314431701ec77e57fde83c', 'hex') | ||
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| let script = Script.getHTLCFollowUpTx(revocationKeyLocal, 144, delayedKeyLocal) | ||
| let p2wsh = Script.wrapP2WSH(script) | ||
|
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| expect(p2wsh).to.deep.equal(Buffer.from('00204adb4e2f00643db396dd120d4e7dc17625f5f2c11a40d857accc862d6b7dd80e', 'hex')) | ||
| }) | ||
| }) | ||
| }) |