private CommitmentTransactionParameters CreateRemoteCommitmentTxParameters(OpenChannelMessage openMessage, AcceptChannelMessage acceptMessage)
{
PublicKeyDerivation publicKeyDerivation = new PublicKeyDerivation(acceptMessage.FirstPerCommitmentPoint);
RevocationPublicKeyDerivation revocationPublicKeyDerivation = new RevocationPublicKeyDerivation(acceptMessage.FirstPerCommitmentPoint);
PublicKeyDerivation remotePublicKeyDerivation = new PublicKeyDerivation(openMessage.FirstPerCommitmentPoint);
CommitmentTransactionParameters parameters = new CommitmentTransactionParameters
{
TransactionNumber = 0,
HtlcBasepoint = acceptMessage.HtlcBasepoint,
HtlcPublicKey = remotePublicKeyDerivation.Derive(acceptMessage.HtlcBasepoint),
PaymentBasepoint = acceptMessage.PaymentBasepoint,
PaymentPublicKey = remotePublicKeyDerivation.Derive(acceptMessage.PaymentBasepoint),
DelayedPaymentBasepoint = acceptMessage.DelayedPaymentBasepoint,
DelayedPaymentPublicKey = publicKeyDerivation.Derive(acceptMessage.DelayedPaymentBasepoint),
RevocationBasepoint = acceptMessage.RevocationBasepoint,
RevocationPublicKey = revocationPublicKeyDerivation.DerivePublicKey(openMessage.RevocationBasepoint),
PerCommitmentKey = acceptMessage.FirstPerCommitmentPoint,
FundingKey = acceptMessage.FundingPubKey,
ToRemoteMsat = openMessage.FundingSatoshis * 1000 - openMessage.PushMSat,
ToLocalMsat = openMessage.PushMSat
};
return(parameters);
}
public void DerivePublicKeyTest()
{
var basePoint = new ECKeyPair("036d6caac248af96f6afa7f904f550253a0f3ef3f5aa2fe6838a95b216691468e2", false);
var perCommitmentPoint = new ECKeyPair("025f7117a78150fe2ef97db7cfc83bd57b2e2c0d0dd25eaf467a4a1c2a45ce1486", false);
var publicKeyDerivation = new RevocationPublicKeyDerivation(perCommitmentPoint);
var resultKey = publicKeyDerivation.DerivePublicKey(basePoint);
Assert.Equal("02916e326636d19c33f13e8c0c3a03dd157f332f3e99c317c141dd865eb01f8ff0", resultKey.PublicKeyCompressed.ToHex());
}
public void DerivePublicKeyTest2()
{
var basePoint = new ECKeyPair("03556bc751fe83e1a6e37fe009d6af41c1f757aa53e8fc4266a6dbf4ab7aaad974", false);
var perCommitmentPoint = new ECKeyPair("031929dce9f9d1953000afab33d03517880ab37b8a15d0613401cf7a805737d537", false);
var publicKeyDerivation = new RevocationPublicKeyDerivation(perCommitmentPoint);
var resultKey = publicKeyDerivation.DerivePublicKey(basePoint);
Assert.Equal("021B279460B0CBDA8BF1F15A99B07101585EE6259555818C1D19CA8BAC4A177672".ToLower(), resultKey.PublicKeyCompressed.ToHex());
}
public void ValidateTest()
{
CommitmentTransactionBuilder builder = new CommitmentTransactionBuilder();
/*
* OpenChannelMessage(32)
* Chain Hash (Hash (32 Bytes), 32): 43497fd7f826957108f4a30fd9cec3aeba79972084e90ead01ea330900000000
* Temporary Channel ID (Channel ID, 32): 9b33024da3d0f725434cbaa91dfbdcd18d8e372d879d2a0c94d5e23836786715
* Funding Satoshis (Unsigned Long, 8): 25000 (0x00000000000061a8)
* Push mSat (Unsigned Long, 8): 0 (0x0000000000000000)
* Dust Limit Satoshis (Unsigned Long, 8): 546 (0x0000000000000222)
* Max HTLC Value In Flight mSat (Unsigned Long, 8): 5000000000 (0x000000012a05f200)
* Channel Reserve Satoshis (Unsigned Long, 8): 2500 (0x00000000000009c4)
* HTLC Minimum mSat (Unsigned Long, 8): 1000 (0x00000000000003e8)
* Feerate Per KW (Unsigned Integer, 4): 1011 (0x000003f3)
* To Self Delay (Unsigned Short, 2): 144 (0x0090)
* Max Accepted HTLCs (Unsigned Short, 2): 483 (0x01e3)
* Funding PubKey (Public Key, 33): 0250d049da6b5832a9f2416df3b0db52da127426c2b70a35ca9c270a72f3f840b5
* Revocation Basepoint (Public Key, 33): 022ecc432552ff86d053514ffb133d3025fb14c39aa5ae2a5169b0367174cabfa4
* Payment Basepoint (Public Key, 33): 029d100efe40aa3f58985fa12bd0f5c75711449ff4d30adca6f1968a2200bbbf1a
* Delayed Payment Basepoint (Public Key, 33): 0245b02f6672c2342fe3ced57118fcf4a0309327e32c335ce494365eb0d15b7200
* HTLC Basepoint (Public Key, 33): 03d029229db8f594adcd545b4a42acbb1013286908d2905fa05c9a4e2083fe3fe2
* First Per Commitment Point (Public Key, 33): 02846726efa57378ad8370acf094f26902a7f1e21903791ef4ab6f989da86679f2
* Channel Flags (Byte, 1): 00
* Shutdown ScriptPubKey (Variable Array, 25): 76a9141c60596620b0b9966400cb710b8da6de5a80d68588ac
*
* AcceptChannelMessage(33)
* Temporary Channel ID (Channel ID, 32): 9b33024da3d0f725434cbaa91dfbdcd18d8e372d879d2a0c94d5e23836786715
* Dust Limit Satoshis (Unsigned Long, 8): 573 (0x000000000000023d)
* Max HTLC Value In Flight mSat (Unsigned Long, 8): 24750000 (0x000000000179a7b0)
* Channel Reserve Satoshis (Unsigned Long, 8): 546 (0x0000000000000222)
* HTLC Minimum mSat (Unsigned Long, 8): 1000 (0x00000000000003e8)
* Minimum Depth (Unsigned Integer, 4): 3 (0x00000003)
* To Self Delay (Unsigned Short, 2): 144 (0x0090)
* Max Accepted HTLCs (Unsigned Short, 2): 483 (0x01e3)
* Funding PubKey (Public Key, 33): 0299de4bbf495e5bbeb2456c2beb3f40450a3fa41aaa50819ae201f8ad69226bfe
* Revocation Basepoint (Public Key, 33): 022b2aa486f5a8aca1898824ac3b2a8a15c92de813362846b992f94d923b143f92
* Payment Basepoint (Public Key, 33): 02d91224d91760f477df21d24713b713c681b084e508f48dc77ca14db549ba8ceb
* Delayed Payment Basepoint (Public Key, 33): 0341665cedb568e09f0ab2ab4a28bc2749620deacefb3dce61aac8251c91709d3a
* HTLC Basepoint (Public Key, 33): 0336439e36e2bc1f264c6d3bc6e12db6256389bef2056c32e6267d6e285c2b2122
* First Per Commitment Point (Public Key, 33): 039360132ab07e7f56d6782a644233da9c4c24845609fcd302cbedd69f69848358
*
* FundingCreatedMessage(34)
* Temporary Channel ID (Channel ID, 32): 9b33024da3d0f725434cbaa91dfbdcd18d8e372d879d2a0c94d5e23836786715
* Funding Transaction ID (Transaction ID, 32): 282ea2263611611169ee505fc83979ecaf1ad99b565f9d64c1b1fb804c427da3
* Funding Output Index (Unsigned Short, 2): 1 (0x0001)
* Signature (Signature, 64): 4fed2d370e0166934d63d4b0ca5c523839ca12bc2acdc5c3238c33a1460e409d39a5d267d7132abe3b8c6bf46c2bf456a47b4462931558af371dfd1f7312f0a5
*
* FundingSignedMessage(35)
* Channel ID (Channel ID, 32): 282ea2263611611169ee505fc83979ecaf1ad99b565f9d64c1b1fb804c427da2
* Signature (Signature, 64): 2f26e967305b4d422116a7c876d338bc4298263f329a54c0d1655f55d594de4955356386addd0bc15ced36dacece0af439694195654c838769583409eeac5d3f
*
*/
// Local
ECKeyPair fundingKeyPrivateKey = new ECKeyPair("DD06232AE9A50384A72D85CED6351DCB35C798231D4985615C77D6847F83FC65", true);
ECKeyPair localFundingPubKey = new ECKeyPair("0250d049da6b5832a9f2416df3b0db52da127426c2b70a35ca9c270a72f3f840b5", false);
ECKeyPair localPaymentBasepoint = new ECKeyPair("029d100efe40aa3f58985fa12bd0f5c75711449ff4d30adca6f1968a2200bbbf1a", false);
ECKeyPair localDelayedPaymentBasepoint = new ECKeyPair("0245b02f6672c2342fe3ced57118fcf4a0309327e32c335ce494365eb0d15b7200", false);
ECKeyPair localPerCommitmentPoint = new ECKeyPair("02846726efa57378ad8370acf094f26902a7f1e21903791ef4ab6f989da86679f2", false);
// Remote
ECKeyPair remoteRevocationBasepoint = new ECKeyPair("022b2aa486f5a8aca1898824ac3b2a8a15c92de813362846b992f94d923b143f92", false);
ECKeyPair remotePaymentBasepoint = new ECKeyPair("02d91224d91760f477df21d24713b713c681b084e508f48dc77ca14db549ba8ceb", false);
ECKeyPair remoteFundingKey = new ECKeyPair("0299de4bbf495e5bbeb2456c2beb3f40450a3fa41aaa50819ae201f8ad69226bfe", false);
// Derive Local
RevocationPublicKeyDerivation revocationPublicKeyDerivation = new RevocationPublicKeyDerivation(localPerCommitmentPoint);
PublicKeyDerivation publicKeyDerivation = new PublicKeyDerivation(localPerCommitmentPoint);
ECKeyPair localDelayedPaymentPubkey = publicKeyDerivation.Derive(localDelayedPaymentBasepoint);
ECKeyPair localRevocationPubkey = revocationPublicKeyDerivation.DerivePublicKey(remoteRevocationBasepoint);
builder.CommitmentTxParams = new CommitmentTransactionParameters();
builder.CommitmentTxParams.TransactionNumber = 0;
builder.CommitmentTxParams.RevocationPublicKey = localRevocationPubkey;
builder.CommitmentTxParams.DelayedPaymentPublicKey = localDelayedPaymentPubkey;
builder.CommitmentTxParams.PaymentBasepoint = localPaymentBasepoint;
builder.CommitmentTxParams.FundingKey = localFundingPubKey;
builder.FeeratePerKw = 1011;
builder.CommitmentTxParams.ToLocalMsat = 25000000;
builder.CommitmentTxParams.ToRemoteMsat = 0;
builder.FundingTransactionOutputIndex = 1;
builder.FundingAmount = 25000;
builder.FundingTransactionHash = "a37d424c80fbb1c1649d5f569bd91aafec7939c85f50ee691161113626a22e28";
builder.IsFunder = true;
builder.ChannelParameters = new ChannelParameters();
builder.ChannelParameters.DustLimitSatoshis = 546;
builder.ChannelParameters.ToSelfDelay = 144;
builder.RemotePaymentBasePoint = remotePaymentBasepoint;
builder.RemoteFundingPubKey = remoteFundingKey;
builder.Network = NBitcoin.Network.TestNet;
var signature = SignatureConverter.RawToTransactionSignature("2f26e967305b4d422116a7c876d338bc4298263f329a54c0d1655f55d594de4955356386addd0bc15ced36dacece0af439694195654c838769583409eeac5d3f"
.HexToByteArray());
Assert.True(builder.IsValidSignature(signature, fundingKeyPrivateKey));
}
