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(very) partial implementation of bolt 3
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sstone
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1 changed files with 125 additions and 0 deletions
125
eclair-node/src/main/scala/fr/acinq/protos/Bolt3.scala
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125
eclair-node/src/main/scala/fr/acinq/protos/Bolt3.scala
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package fr.acinq.protos
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import fr.acinq.bitcoin._
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/**
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* Created by fabrice on 21/11/16.
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*/
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object Bolt3 extends App {
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// Alice = local, Bob = remote
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val (_, localPrivKey) = Base58Check.decode("cVuzKWCszfvjkoJyUasvsrRdECriz8hSd1BDinRNzytwnXmX7m1g")
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val (_, remotePrivKey) = Base58Check.decode("cRUfvpbRtMSqCFD1ADdvgPn5HfRLYuHCFYAr2noWnaRDNger2AoA")
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val localPubKey = Crypto.publicKeyFromPrivateKey(localPrivKey)
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val remotePubKey = Crypto.publicKeyFromPrivateKey(remotePrivKey)
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def fundingScript(pubKey1: BinaryData, pubKey2: BinaryData) = Script.pay2wsh(Script.createMultiSigMofN(2, pubKey1.toArray :: pubKey2.toArray :: Nil))
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def toLocal(delay: Long, localDelayedKey: BinaryData) = Script.pay2wsh(OP_PUSHDATA(Script.encodeNumber(delay)) :: OP_CHECKSEQUENCEVERIFY :: OP_DROP :: OP_PUSHDATA(localDelayedKey) :: OP_CHECKSIG :: Nil)
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def toRemote(remoteKey: BinaryData) = Script.pay2pkh(remoteKey)
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def htlcOffered(localKey: BinaryData, remoteKey: BinaryData, paymentHash: BinaryData) = {
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// @formatter:off
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OP_PUSHDATA(remoteKey) :: OP_SWAP ::
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OP_SIZE :: OP_PUSHDATA(Script.encodeNumber(32)) :: OP_EQUAL ::
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OP_NOTIF ::
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OP_DROP :: OP_2 :: OP_SWAP :: OP_PUSHDATA(localKey) :: OP_2 :: OP_CHECKMULTISIGVERIFY ::
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OP_ELSE ::
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OP_HASH160 :: OP_PUSHDATA(paymentHash) :: OP_EQUALVERIFY ::
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OP_CHECKSIGVERIFY ::
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OP_ENDIF :: Nil
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// @formatter:on
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}
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def htlcReceived(localKey: BinaryData, remoteKey: BinaryData, paymentHash: BinaryData, lockTime: Long) = {
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// @formatter:off
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OP_PUSHDATA(remoteKey) :: OP_SWAP ::
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OP_SIZE :: OP_PUSHDATA(Script.encodeNumber(32)) :: OP_EQUAL ::
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OP_IF ::
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OP_HASH160 :: OP_PUSHDATA(paymentHash) :: OP_EQUALVERIFY ::
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OP_2 :: OP_SWAP :: OP_PUSHDATA(localKey) :: OP_2 :: OP_CHECKMULTISIGVERIFY ::
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OP_ELSE ::
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OP_DROP :: OP_PUSHDATA(Script.encodeNumber(lockTime)) :: OP_CHECKLOCKTIMEVERIFY :: OP_DROP :: OP_CHECKSIGVERIFY ::
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OP_ENDIF :: Nil
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// @formatter:on
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}
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def htlcSuccessOrTimeout(revocationPubKey: BinaryData, toSelfDelay: Long, localDelayedKey: BinaryData) = {
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// @formatter:off
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OP_IF ::
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OP_PUSHDATA(revocationPubKey) ::
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OP_ELSE ::
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OP_PUSHDATA(Script.encodeNumber(toSelfDelay)) :: OP_CHECKSEQUENCEVERIFY :: OP_DROP ::
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OP_PUSHDATA(localDelayedKey) ::
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OP_ENDIF ::
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OP_CHECKSIG :: Nil
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// @formatter:on
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}
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val amount = 42000 satoshi
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val fundingTx = Transaction(version = 2, txIn = Nil, txOut = TxOut(amount, fundingScript(localPubKey, remotePubKey)) :: Nil, lockTime = 0)
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val paymentPreimage = Hash.Zeroes
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val paymentHash = Crypto.hash256(paymentPreimage)
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val localDelayedKey = localPubKey
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val paymentPreimage1 = Hash.Zeroes
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val paymentPreimage2 = Hash.One
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val htlcTimeout = 10000 // we use the same t/o for offered and received htlcs
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val commitTx = Transaction(
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version = 2,
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txIn = TxIn(OutPoint(fundingTx, 0), signatureScript = Nil, sequence = TxIn.SEQUENCE_FINAL) :: Nil,
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txOut = Seq(
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TxOut(22000 satoshi, toLocal(15000, localDelayedKey)),
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TxOut(10000 satoshi, toRemote(remotePubKey)),
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TxOut(6000 satoshi, Script.pay2wsh(htlcOffered(localPubKey, remotePubKey, Crypto.hash160(paymentPreimage1)))),
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TxOut(4000 satoshi, Script.pay2wsh(htlcReceived(localPubKey, remotePubKey, Crypto.hash160(paymentPreimage2), htlcTimeout)))
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),
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lockTime = 0)
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// Both sides sign the commit tx
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val signedCommitTx = {
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val redeemScript: BinaryData = Script.createMultiSigMofN(2, localPubKey :: remotePubKey :: Nil)
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val localSig: BinaryData = Transaction.signInput(commitTx, 0, redeemScript, SIGHASH_ALL, fundingTx.txOut(0).amount, SigVersion.SIGVERSION_WITNESS_V0, localPrivKey)
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val remoteSig: BinaryData = Transaction.signInput(commitTx, 0, redeemScript, SIGHASH_ALL, fundingTx.txOut(0).amount, SigVersion.SIGVERSION_WITNESS_V0, remotePrivKey)
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val witness = ScriptWitness(BinaryData.empty :: localSig :: remoteSig :: redeemScript :: Nil)
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commitTx.updateWitness(0, witness)
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}
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Transaction.correctlySpends(signedCommitTx, fundingTx :: Nil, ScriptFlags.STANDARD_SCRIPT_VERIFY_FLAGS)
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val revocationPubKey = remotePubKey
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// offered HTLC
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val htlcTimeoutTx = {
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val tx = Transaction(
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version = 2,
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txIn = TxIn(OutPoint(signedCommitTx, 3), signatureScript = Nil, sequence = 0) :: Nil,
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txOut = TxOut(4000 satoshi, htlcSuccessOrTimeout(remotePubKey, htlcTimeout, localDelayedKey)) :: Nil,
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lockTime = htlcTimeout + 1)
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val redeemScript: BinaryData = Script.write(htlcReceived(localPubKey, remotePubKey, Crypto.hash160(paymentPreimage2), htlcTimeout))
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val remoteSig: BinaryData = Transaction.signInput(tx, 0, redeemScript, SIGHASH_ALL, signedCommitTx.txOut(3).amount, SigVersion.SIGVERSION_WITNESS_V0, remotePrivKey)
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val witness = ScriptWitness(BinaryData("01") :: remoteSig :: BinaryData.empty :: redeemScript :: Nil)
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tx.updateWitness(0, witness)
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}
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// Alice (local) can claim the offered HTLC after a delay
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Transaction.correctlySpends(htlcTimeoutTx, signedCommitTx :: Nil, ScriptFlags.STANDARD_SCRIPT_VERIFY_FLAGS)
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// received HTLC
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val htlcSuccessTx = {
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val tx = Transaction(
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version = 2,
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txIn = TxIn(OutPoint(signedCommitTx, 2), signatureScript = Nil, sequence = TxIn.SEQUENCE_FINAL) :: Nil,
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txOut = TxOut(6000 satoshi, htlcSuccessOrTimeout(remotePubKey, htlcTimeout, localDelayedKey)) :: Nil,
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lockTime = 0)
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val redeemScript: BinaryData = Script.write(htlcReceived(localPubKey, remotePubKey, Crypto.hash160(paymentPreimage2), htlcTimeout))
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val localSig: BinaryData = Transaction.signInput(tx, 0, redeemScript, SIGHASH_ALL, signedCommitTx.txOut(2).amount, SigVersion.SIGVERSION_WITNESS_V0, localPrivKey)
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val remoteSig: BinaryData = Transaction.signInput(tx, 0, redeemScript, SIGHASH_ALL, signedCommitTx.txOut(2).amount, SigVersion.SIGVERSION_WITNESS_V0, remotePrivKey)
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val witness = ScriptWitness(BinaryData("01") :: remoteSig :: BinaryData.empty :: redeemScript :: Nil)
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tx.updateWitness(0, witness)
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}
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}
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