@node-dlc/messaging

<!doctype html> <html lang="en"> <head> <title>Code coverage report for lib/messages/DlcSign.ts</title> <meta charset="utf-8" /> <link rel="stylesheet" href="../../prettify.css" /> <link rel="stylesheet" href="../../base.css" /> <link rel="shortcut icon" type="image/x-icon" href="../../favicon.png" /> <meta name="viewport" content="width=device-width, initial-scale=1" /> <style type='text/css'> .coverage-summary .sorter { background-image: url(../../sort-arrow-sprite.png); } </style> </head> <body> <div class='wrapper'> <div class='pad1'> <h1><a href="../../index.html">All files</a> / <a href="index.html">lib/messages</a> DlcSign.ts</h1> <div class='clearfix'> <div class='fl pad1y space-right2'> 79.46% Statements 89/112 </div> <div class='fl pad1y space-right2'> 35.42% Branches 17/48 </div> <div class='fl pad1y space-right2'> 80% Functions 16/20 </div> <div class='fl pad1y space-right2'> 79.28% Lines 88/111 </div> </div> Press n or j to go to the next uncovered block, b, p or k for the previous block. </div> <div class='status-line medium'></div> <pre><table class="coverage"> <tr><td class="line-count quiet"><a name='L1'></a><a href='#L1'>1</a> <a name='L2'></a><a href='#L2'>2</a> <a name='L3'></a><a href='#L3'>3</a> <a name='L4'></a><a href='#L4'>4</a> <a name='L5'></a><a href='#L5'>5</a> <a name='L6'></a><a href='#L6'>6</a> <a name='L7'></a><a href='#L7'>7</a> <a name='L8'></a><a href='#L8'>8</a> <a name='L9'></a><a href='#L9'>9</a> <a name='L10'></a><a href='#L10'>10</a> <a name='L11'></a><a href='#L11'>11</a> <a name='L12'></a><a href='#L12'>12</a> <a name='L13'></a><a href='#L13'>13</a> <a name='L14'></a><a href='#L14'>14</a> <a name='L15'></a><a href='#L15'>15</a> <a name='L16'></a><a href='#L16'>16</a> <a name='L17'></a><a href='#L17'>17</a> <a name='L18'></a><a href='#L18'>18</a> <a name='L19'></a><a href='#L19'>19</a> <a name='L20'></a><a href='#L20'>20</a> <a name='L21'></a><a href='#L21'>21</a> <a name='L22'></a><a href='#L22'>22</a> <a name='L23'></a><a 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href='#L351'>351</a> <a name='L352'></a><a href='#L352'>352</a> <a name='L353'></a><a href='#L353'>353</a> <a name='L354'></a><a href='#L354'>354</a> <a name='L355'></a><a href='#L355'>355</a> <a name='L356'></a><a href='#L356'>356</a> <a name='L357'></a><a href='#L357'>357</a> <a name='L358'></a><a href='#L358'>358</a> <a name='L359'></a><a href='#L359'>359</a> <a name='L360'></a><a href='#L360'>360</a></td><td class="line-coverage quiet">1x 1x   1x 1x 1x 1x 1x         1x 1x               1x 1x                 30x     30x 30x     30x         30x 30x 30x             30x   30x           30x         30x 30x     30x       30x                     30x   30x         30x     30x     5110x 5110x               30x                     30x   30x         30x   30x 30x       60x 60x 60x           30x               47x 47x   47x     47x 47x     47x         47x 47x   47x     47x         47x 47x     47x                                           47x           83x     83x                                                                                       17x   17x                           53x 53x     53x 53x 53x 53x 53x     53x           53x           53x                       1x 2x             4x                               3x   3x   3x 6x   6x 6x   3x                 1x 1x 1x 1x   2x 2x 2x 2x   1x      </td><td class="text"><pre class="prettyprint lang-js">import { BufferReader, BufferWriter } from '@node-dlc/bufio'; import secp256k1 from 'secp256k1';   import { MessageType, PROTOCOL_VERSION } from '../MessageType'; import { deserializeTlv } from '../serialize/deserializeTlv'; import { getTlv } from '../serialize/getTlv'; import { BatchFundingGroup } from './BatchFundingGroup'; import { CetAdaptorSignatures, ICetAdaptorSignaturesJSON, } from './CetAdaptorSignatures'; import { IDlcMessage } from './DlcMessage'; import { FundingSignatures, IFundingSignaturesJSON } from './FundingSignatures'; import { ScriptWitnessV0 } from './ScriptWitnessV0';   /** * DlcSign gives all of the initiator's signatures, which allows the * receiver to broadcast the funding transaction with both parties being * fully committed to all closing transactions. * Updated to support dlcspecs PR #163 format. */ export class DlcSign implements IDlcMessage { public static type = MessageType.DlcSign;   /** * Creates a DlcSign from JSON data (e.g., from test vectors) * Handles both our internal format and external test vector formats * @param json JSON object representing a DLC sign */ // eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types, @typescript-eslint/no-explicit-any public static fromJSON(json: any): DlcSign { const instance = new DlcSign();   // Helper function to parse DER-encoded signature and extract raw r,s values (64 bytes total) const parseDerSignature = (hexSig: string): Buffer => { const sigBuffer = Buffer.from(hexSig, 'hex');   // If it's already 64 bytes, assume it's raw Iif (sigBuffer.length === 64) { return sigBuffer; }   // Use secp256k1.signatureImport to parse DER signature try { const rawSig = secp256k1.signatureImport(sigBuffer); return Buffer.from(rawSig); } catch (ex) { throw new Error(`Invalid DER signature: ${ex.message}`); } };   // Handle both internal and external field naming conventions instance.protocolVersion = json.protocolVersion || json.protocol_version || PROTOCOL_VERSION; instance.contractId = Buffer.from( json.contractId || json.contract_id, 'hex', );   // Parse CET adaptor signatures instance.cetAdaptorSignatures = DlcSign.parseCetAdaptorSignaturesFromJSON( json.cetAdaptorSignatures || json.cet_adaptor_signatures, );   // Parse refund signature - handle DER encoding const refundSigHex = json.refundSignature || json.refund_signature; instance.refundSignature = parseDerSignature(refundSigHex);   // Parse funding signatures instance.fundingSignatures = DlcSign.parseFundingSignaturesFromJSON( json.fundingSignatures || json.funding_signatures, );   return instance; }   /** * Parses CetAdaptorSignatures from JSON * @param cetSigsJson JSON object representing CET adaptor signatures */ private static parseCetAdaptorSignaturesFromJSON( // eslint-disable-next-line @typescript-eslint/no-explicit-any cetSigsJson: any, ): CetAdaptorSignatures { const instance = new CetAdaptorSignatures();   Eif ( cetSigsJson.ecdsaAdaptorSignatures || cetSigsJson.ecdsa_adaptor_signatures ) { const ecdsaSigs = cetSigsJson.ecdsaAdaptorSignatures || cetSigsJson.ecdsa_adaptor_signatures; // eslint-disable-next-line @typescript-eslint/no-explicit-any instance.sigs = ecdsaSigs.map((sig: any) => { // The test vectors use 'signature' field, but our internal format uses encryptedSig/dleqProof // For now, we'll parse the signature as encryptedSig and leave dleqProof empty const sigBuffer = Buffer.from(sig.signature, 'hex'); return { encryptedSig: sigBuffer.slice(0, 65), // First 65 bytes dleqProof: sigBuffer.length > 65 ? sigBuffer.slice(65, 162) : Buffer.alloc(97), // Next 97 bytes or empty }; }); }   return instance; }   /** * Parses FundingSignatures from JSON * @param fundingSigsJson JSON object representing funding signatures */ private static parseFundingSignaturesFromJSON( // eslint-disable-next-line @typescript-eslint/no-explicit-any fundingSigsJson: any, ): FundingSignatures { const instance = new FundingSignatures();   Eif ( fundingSigsJson.fundingSignatures || fundingSigsJson.funding_signatures ) { const fundingSigs = fundingSigsJson.fundingSignatures || fundingSigsJson.funding_signatures; // eslint-disable-next-line @typescript-eslint/no-explicit-any instance.witnessElements = fundingSigs.map((sig: any) => (sig.witnessElements || sig.witness_elements || []).map( // eslint-disable-next-line @typescript-eslint/no-explicit-any (element: any) => { // Create a ScriptWitnessV0 instance for each witness element const witness = new ScriptWitnessV0(); witness.witness = Buffer.from(element.witness || element, 'hex'); return witness; }, ), ); }   return instance; }   /** * Deserializes a sign_dlc message * @param buf */ public static deserialize(buf: Buffer): DlcSign { const instance = new DlcSign(); const reader = new BufferReader(buf);   reader.readUInt16BE(); // read type   // New fields as per dlcspecs PR #163 instance.protocolVersion = reader.readUInt32BE(); instance.contractId = reader.readBytes(32);   // Read CET adaptor signatures directly to match serialize format (no TLV wrapping) instance.cetAdaptorSignatures = CetAdaptorSignatures.deserialize( reader.buffer.subarray(reader.position), );   // Skip past the CET adaptor signatures we just read const cetLength = instance.cetAdaptorSignatures.serialize().length; reader.position += cetLength;   instance.refundSignature = reader.readBytes(64);   // Read funding signatures directly to match serialize format (no TLV wrapping) instance.fundingSignatures = FundingSignatures.deserialize( reader.buffer.subarray(reader.position), );   // Skip past the funding signatures we just read const fundingLength = instance.fundingSignatures.serialize().length; reader.position += fundingLength;   // Parse TLV stream as per dlcspecs PR #163 while (!reader.eof) { const buf = getTlv(reader); const tlvReader = new BufferReader(buf); const { type } = deserializeTlv(tlvReader);   switch (Number(type)) { case MessageType.BatchFundingGroup: if (!instance.batchFundingGroups) { instance.batchFundingGroups = []; } instance.batchFundingGroups.push(BatchFundingGroup.deserialize(buf)); break; default: // Store unknown TLVs for future compatibility if (!instance.unknownTlvs) { instance.unknownTlvs = []; } instance.unknownTlvs.push({ type: Number(type), data: buf }); break; } }   return instance; }   /** * The type for sign_dlc message. sign_dlc = 42782 */ public type = DlcSign.type;   // New fields as per dlcspecs PR #163 public protocolVersion: number = PROTOCOL_VERSION; // Default to current protocol version   // Existing fields public contractId: Buffer;   public cetAdaptorSignatures: CetAdaptorSignatures;   public refundSignature: Buffer;   public fundingSignatures: FundingSignatures;   public batchFundingGroups?: BatchFundingGroup[];   // Store unknown TLVs for forward compatibility public unknownTlvs?: Array<{ type: number; data: Buffer }>;   /** * Validates correctness of all fields * Updated validation rules as per dlcspecs PR #163 * @throws Will throw an error if validation fails */ public validate(): void { // 1. Type is set automatically in class // 2. protocol_version validation if (this.protocolVersion !== PROTOCOL_VERSION) { throw new Error( `Unsupported protocol version: ${this.protocolVersion}, expected: ${PROTOCOL_VERSION}`, ); }   // 3. contract_id must be 32 bytes if (!this.contractId || this.contractId.length !== 32) { throw new Error('contractId must be 32 bytes'); }   // 4. Other validations would depend on specific business logic // TODO: Add more specific validation rules as needed }   /** * Converts sign_dlc to JSON (canonical rust-dlc format) */ public toJSON(): IDlcSignJSON { // Convert raw signature back to DER format for canonical rust-dlc JSON const derRefundSignature = secp256k1.signatureExport(this.refundSignature);   return { protocolVersion: this.protocolVersion, contractId: this.contractId.toString('hex'), cetAdaptorSignatures: this.cetAdaptorSignatures.toJSON(), refundSignature: Buffer.from(derRefundSignature).toString('hex'), fundingSignatures: this.fundingSignatures.toJSON(), }; }   /** * Serializes the sign_dlc message into a Buffer * Updated serialization format as per dlcspecs PR #163 */ public serialize(): Buffer { const writer = new BufferWriter(); writer.writeUInt16BE(this.type);   // New fields as per dlcspecs PR #163 writer.writeUInt32BE(this.protocolVersion); writer.writeBytes(this.contractId); writer.writeBytes(this.cetAdaptorSignatures.serialize()); writer.writeBytes(this.refundSignature); writer.writeBytes(this.fundingSignatures.serialize());   // TLV stream as per dlcspecs PR #163 Iif (this.batchFundingGroups) this.batchFundingGroups.forEach((fundingInfo) => writer.writeBytes(fundingInfo.serialize()), );   // Write unknown TLVs for forward compatibility Iif (this.unknownTlvs) { this.unknownTlvs.forEach((tlv) => { writer.writeBytes(tlv.data); }); }   return writer.toBuffer(); } }   export interface IDlcSignJSON { protocolVersion: number; contractId: string; cetAdaptorSignatures: ICetAdaptorSignaturesJSON; refundSignature: string; fundingSignatures: IFundingSignaturesJSON; }   export class DlcSignContainer { private signs: DlcSign[] = [];   /** * Adds a DlcSign to the container. * @param sign The DlcSign to add. */ public addSign(sign: DlcSign): void { this.signs.push(sign); }   /** * Returns all DlcSigns in the container. * @returns An array of DlcSign instances. */ public getSigns(): DlcSign[] { return this.signs; }   /** * Serializes all DlcSigns in the container to a Buffer. * @returns A Buffer containing the serialized DlcSigns. */ public serialize(): Buffer { const writer = new BufferWriter(); // Write the number of signs in the container first. writer.writeBigSize(this.signs.length); // Serialize each sign and write it. this.signs.forEach((sign) => { const serializedSign = sign.serialize(); // Optionally, write the length of the serialized sign for easier deserialization. writer.writeBigSize(serializedSign.length); writer.writeBytes(serializedSign); }); return writer.toBuffer(); }   /** * Deserializes a Buffer into a DlcSignContainer with DlcSigns. * @param buf The Buffer to deserialize. * @returns A DlcSignContainer instance. */ public static deserialize(buf: Buffer): DlcSignContainer { const reader = new BufferReader(buf)