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import { MessageType } from '../MessageType';
import { IDlcMessage } from './DlcMessage';
/**
* DlcInput contains information about a DLC input to be used in a funding transaction.
* Contains the local and remote funding public keys and the contract ID of the DLC input.
* Matches rust-dlc DlcInput struct.
*/
export class DlcInput implements IDlcMessage {
public static type = MessageType.DlcInput;
/**
* Creates a DlcInput from JSON data
* @param json JSON object representing DLC input
*/
// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types, @typescript-eslint/no-explicit-any
public static fromJSON(json: any): DlcInput {
const instance = new DlcInput();
// Parse local funding public key
const localFundPubkey = json.localFundPubkey || json.local_fund_pubkey;
Eif (typeof localFundPubkey === 'string') {
instance.localFundPubkey = Buffer.from(localFundPubkey, 'hex');
} else {
throw new Error('localFundPubkey is required');
}
// Parse remote funding public key
const remoteFundPubkey = json.remoteFundPubkey || json.remote_fund_pubkey;
Eif (typeof remoteFundPubkey === 'string') {
instance.remoteFundPubkey = Buffer.from(remoteFundPubkey, 'hex');
} else {
throw new Error('remoteFundPubkey is required');
}
// Parse contract ID (32 bytes)
const contractId = json.contractId || json.contract_id;
Eif (typeof contractId === 'string') {
instance.contractId = Buffer.from(contractId, 'hex');
} else {
throw new Error('contractId is required');
}
return instance;
}
/**
* Deserializes a dlc_input message
* @param buf
*/
public static deserialize(buf: Buffer): DlcInput {
const instance = new DlcInput();
const reader = new BufferReader(buf);
reader.readBigSize(); // read type
instance.length = reader.readBigSize();
// Read local funding public key (33 bytes)
instance.localFundPubkey = reader.readBytes(33);
// Read remote funding public key (33 bytes)
instance.remoteFundPubkey = reader.readBytes(33);
// Read contract ID (32 bytes)
instance.contractId = reader.readBytes(32);
return instance;
}
/**
* Deserializes a dlc_input without TLV wrapper (for use in FundingInput)
* @param buf
*/
public static deserializeBody(buf: Buffer): DlcInput {
const instance = new DlcInput();
const reader = new BufferReader(buf);
// Read local funding public key (33 bytes)
instance.localFundPubkey = reader.readBytes(33);
// Read remote funding public key (33 bytes)
instance.remoteFundPubkey = reader.readBytes(33);
// Read contract ID (32 bytes)
instance.contractId = reader.readBytes(32);
return instance;
}
/**
* The type for dlc_input message. dlc_input = 42773
*/
public type = DlcInput.type;
public length: bigint;
public localFundPubkey: Buffer;
public remoteFundPubkey: Buffer;
public contractId: Buffer;
/**
* Validates correctness of all fields
* @throws Will throw an error if validation fails
*/
public validate(): void {
if (!this.localFundPubkey) {
throw new Error('localFundPubkey is required');
}
if (!this.remoteFundPubkey) {
throw new Error('remoteFundPubkey is required');
}
if (!this.contractId || this.contractId.length !== 32) {
throw new Error('contractId must be a 32-byte buffer');
}
}
/**
* Converts dlc_input to JSON
*/
public toJSON(): IDlcInputJSON {
return {
localFundPubkey: this.localFundPubkey.toString('hex'),
remoteFundPubkey: this.remoteFundPubkey.toString('hex'),
contractId: this.contractId.toString('hex'),
};
}
/**
* Serializes the dlc_input message into a Buffer
*/
public serialize(): Buffer {
const writer = new BufferWriter();
writer.writeBigSize(this.type);
const dataWriter = new BufferWriter();
dataWriter.writeBytes(this.localFundPubkey);
dataWriter.writeBytes(this.remoteFundPubkey);
dataWriter.writeBytes(this.contractId);
writer.writeBigSize(dataWriter.size);
writer.writeBytes(dataWriter.toBuffer());
return writer.toBuffer();
}
/**
* Serializes dlc_input body without TLV wrapper (for embedding in FundingInput)
*/
public serializeBody(): Buffer {
const writer = new BufferWriter();
writer.writeBytes(this.localFundPubkey);
writer.writeBytes(this.remoteFundPubkey);
writer.writeBytes(this.contractId);
return writer.toBuffer();
}
}
export interface IDlcInputJSON {
localFundPubkey: string;
remoteFundPubkey: string;
contractId: string;
}
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