Press n or j to go to the next uncovered block, b, p or k for the previous block.
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import { ContractInfoType, MessageType } from '../MessageType';
import {
ContractDescriptor,
ContractDescriptorV0JSON,
ContractDescriptorV1JSON,
} from './ContractDescriptor';
import { DlcMessage, IDlcMessage } from './DlcMessage';
import {
MultiOracleInfo,
MultiOracleInfoJSON,
OracleInfo,
SingleOracleInfo,
SingleOracleInfoJSON,
} from './OracleInfo';
export abstract class ContractInfo extends DlcMessage {
public static deserialize(
buf: Buffer,
): SingleContractInfo | DisjointContractInfo {
const reader = new BufferReader(buf);
const typeId = Number(reader.readBigSize());
switch (typeId) {
case ContractInfoType.Single:
return SingleContractInfo.deserialize(buf);
case ContractInfoType.Disjoint:
return DisjointContractInfo.deserialize(buf);
default:
throw new Error(
`Contract info type must be Single (0) or Disjoint (1), got ${typeId}`,
);
}
}
/**
* Creates a ContractInfo from JSON data (e.g., from test vectors)
* @param json JSON object representing contract info
*/
// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types, @typescript-eslint/no-explicit-any
public static fromJSON(json: any): ContractInfo {
Iif (!json) {
throw new Error('contractInfo is required');
}
// Check if it's a single contract info or disjoint contract info
if (json.singleContractInfo || json.single_contract_info) {
return SingleContractInfo.fromJSON(
json.singleContractInfo || json.single_contract_info,
);
} else Eif (json.disjointContractInfo || json.disjoint_contract_info) {
return DisjointContractInfo.fromJSON(
json.disjointContractInfo || json.disjoint_contract_info,
);
} else {
throw new Error(
'contractInfo must have either singleContractInfo or disjointContractInfo',
);
}
}
public abstract contractInfoType: ContractInfoType;
public abstract totalCollateral: bigint;
public abstract validate(): void;
public abstract toJSON(): ISingleContractInfoJSON | IDisjointContractInfoJSON;
public abstract serialize(): Buffer;
// Method to get total collateral (for compatibility)
public getTotalCollateral(): bigint {
return this.totalCollateral;
}
}
/**
* SingleContractInfo contains information about a contract's outcomes,
* their corresponding payouts, and the oracles to be used.
* This corresponds to the previous ContractInfoV0.
*/
export class SingleContractInfo extends ContractInfo implements IDlcMessage {
public static contractInfoType = ContractInfoType.Single;
public static type = MessageType.SingleContractInfo;
/**
* Creates a SingleContractInfo from JSON data
* @param json JSON object representing single contract info
*/
// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types, @typescript-eslint/no-explicit-any
public static fromJSON(json: any): SingleContractInfo {
const instance = new SingleContractInfo();
instance.totalCollateral = BigInt(
json.totalCollateral || json.total_collateral || 0,
);
// Handle nested contractInfo structure (test vectors have double nesting)
const contractInfoData = json.contractInfo || json.contract_info || json;
// Parse contract descriptor using proper fromJSON method
instance.contractDescriptor = ContractDescriptor.fromJSON(
contractInfoData.contractDescriptor ||
contractInfoData.contract_descriptor,
);
// Parse oracle info using proper fromJSON method
instance.oracleInfo = OracleInfo.fromJSON(
contractInfoData.oracleInfo || contractInfoData.oracle_info,
);
return instance;
}
/**
* Deserializes a single_contract_info message
* @param buf
*/
public static deserialize(buf: Buffer): SingleContractInfo {
const instance = new SingleContractInfo();
const reader = new BufferReader(buf);
reader.readBigSize(); // read type (0)
instance.totalCollateral = reader.readUInt64BE();
// Read contract descriptor as sibling type (starts with its own type prefix)
instance.contractDescriptor = ContractDescriptor.deserialize(
reader.buffer.subarray(reader.position),
);
// Skip past the contract descriptor we just read
const descLength = instance.contractDescriptor.serialize().length;
reader.position += descLength;
// Read oracle info with rust-dlc format - discriminator + body
const oracleType = Number(reader.readBigSize());
if (oracleType === 0) {
// Single oracle
instance.oracleInfo = SingleOracleInfo.deserializeBody(
reader.buffer.subarray(reader.position),
);
} else Eif (oracleType === 1) {
// Multi oracle
instance.oracleInfo = MultiOracleInfo.deserializeBody(
reader.buffer.subarray(reader.position),
);
} else {
throw new Error(`Unknown oracle info type: ${oracleType}`);
}
return instance;
}
/**
* The type for single_contract_info message - using MessageType for IDlcMessage compatibility
*/
public type = MessageType.SingleContractInfo;
/**
* The contract info type for new format
*/
public contractInfoType = ContractInfoType.Single;
public totalCollateral: bigint;
public contractDescriptor: ContractDescriptor;
public oracleInfo: OracleInfo;
// Compatibility property
public get length(): bigint {
return BigInt(this.serialize().length);
}
/**
* Validates correctness of all fields in the message
* @throws Will throw an error if validation fails
*/
public validate(): void {
Iif (this.totalCollateral <= 0) {
throw new Error('totalCollateral must be greater than 0');
}
this.oracleInfo.validate();
// TODO: Add contract descriptor validation once available
// this.contractDescriptor.validate();
}
/**
* Converts single_contract_info to JSON
*/
public toJSON(): ISingleContractInfoJSON {
// Return enum variant format for Rust compatibility
return {
singleContractInfo: {
totalCollateral: Number(this.totalCollateral),
contractInfo: {
contractDescriptor: this.contractDescriptor.toJSON(),
oracleInfo: this.oracleInfo.toJSON(),
},
},
};
}
/**
* Serializes the single_contract_info message into a Buffer
*/
public serialize(): Buffer {
const writer = new BufferWriter();
writer.writeBigSize(this.contractInfoType);
writer.writeUInt64BE(this.totalCollateral);
writer.writeBytes(this.contractDescriptor.serialize());
// Use serializeBody() to match rust-dlc behavior - don't add extra TLV wrapper
if (this.oracleInfo instanceof SingleOracleInfo) {
writer.writeBigSize(0); // Single oracle discriminator
writer.writeBytes(this.oracleInfo.serializeBody());
} else {
writer.writeBigSize(1); // Multi oracle discriminator
writer.writeBytes(this.oracleInfo.serializeBody());
}
return writer.toBuffer();
}
}
/**
* DisjointContractInfo contains information about multiple disjoint contract events.
* This corresponds to the previous ContractInfoV1.
*/
export class DisjointContractInfo extends ContractInfo implements IDlcMessage {
public static contractInfoType = ContractInfoType.Disjoint;
public static type = MessageType.DisjointContractInfo;
/**
* Creates a DisjointContractInfo from JSON data
* @param json JSON object representing disjoint contract info
*/
// eslint-disable-next-line @typescript-eslint/explicit-module-boundary-types, @typescript-eslint/no-explicit-any
public static fromJSON(json: any): DisjointContractInfo {
const instance = new DisjointContractInfo();
instance.totalCollateral = BigInt(
json.totalCollateral || json.total_collateral || 0,
);
// Parse contract infos array
const contractInfosData = json.contractInfos || json.contract_infos || [];
instance.contractOraclePairs = contractInfosData.map(
// eslint-disable-next-line @typescript-eslint/no-explicit-any
(contractInfoData: any) => ({
contractDescriptor: ContractDescriptor.fromJSON(
contractInfoData.contractDescriptor ||
contractInfoData.contract_descriptor,
),
oracleInfo: OracleInfo.fromJSON(
contractInfoData.oracleInfo || contractInfoData.oracle_info,
),
}),
);
return instance;
}
/**
* Deserializes a disjoint_contract_info message
* @param buf
*/
public static deserialize(buf: Buffer): DisjointContractInfo {
const instance = new DisjointContractInfo();
const reader = new BufferReader(buf);
reader.readBigSize(); // read type (1)
instance.totalCollateral = reader.readUInt64BE();
const numDisjointEvents = Number(reader.readBigSize());
for (let i = 0; i < numDisjointEvents; i++) {
// Read contract descriptor as sibling type (starts with its own type prefix)
const contractDescriptor = ContractDescriptor.deserialize(
reader.buffer.subarray(reader.position),
);
// Skip past the contract descriptor we just read
const descLength = contractDescriptor.serialize().length;
reader.position += descLength;
// Read oracle info with rust-dlc format - discriminator + body (same as SingleContractInfo)
const oracleType = Number(reader.readBigSize());
let oracleInfo: OracleInfo;
Iif (oracleType === 0) {
// Single oracle
oracleInfo = SingleOracleInfo.deserializeBody(
reader.buffer.subarray(reader.position),
);
} else Eif (oracleType === 1) {
// Multi oracle
oracleInfo = MultiOracleInfo.deserializeBody(
reader.buffer.subarray(reader.position),
);
} else {
throw new Error(`Unknown oracle info type: ${oracleType}`);
}
// Skip past the oracle info we just read
const oracleInfoLength = oracleInfo.serializeBody().length;
reader.position += oracleInfoLength;
instance.contractOraclePairs.push({ contractDescriptor, oracleInfo });
}
return instance;
}
/**
* The type for disjoint_contract_info message - using MessageType for IDlcMessage compatibility
*/
public type = MessageType.DisjointContractInfo;
/**
* The contract info type for new format
*/
public contractInfoType = ContractInfoType.Disjoint;
public totalCollateral: bigint;
public contractOraclePairs: IContractOraclePair[] = [];
// Compatibility property
public get length(): bigint {
return BigInt(this.serialize().length);
}
/**
* Validates correctness of all fields in the message
* @throws Will throw an error if validation fails
*/
public validate(): void {
if (this.totalCollateral <= 0) {
throw new Error('totalCollateral must be greater than 0');
}
if (this.contractOraclePairs.length === 0) {
throw new Error('contractOraclePairs cannot be empty');
}
this.contractOraclePairs.forEach((pair, index) => {
try {
pair.oracleInfo.validate();
// TODO: Add contract descriptor validation once available
// pair.contractDescriptor.validate();
} catch (error) {
throw new Error(
`Validation failed for contract oracle pair ${index}: ${error.message}`,
);
}
});
}
/**
* Converts disjoint_contract_info to JSON
*/
public toJSON(): IDisjointContractInfoJSON {
// Return enum variant format for Rust compatibility
return {
disjointContractInfo: {
totalCollateral: Number(this.totalCollateral),
contractInfos: this.contractOraclePairs.map((pair) => ({
contractDescriptor: pair.contractDescriptor.toJSON(),
oracleInfo: pair.oracleInfo.toJSON(),
})),
},
};
}
/**
* Serializes the disjoint_contract_info message into a Buffer
*/
public serialize(): Buffer {
const writer = new BufferWriter();
writer.writeBigSize(this.contractInfoType);
writer.writeUInt64BE(this.totalCollateral);
writer.writeBigSize(this.contractOraclePairs.length);
for (const pair of this.contractOraclePairs) {
writer.writeBytes(pair.contractDescriptor.serialize());
// Write oracle info with discriminator like SingleContractInfo does
Iif (pair.oracleInfo instanceof SingleOracleInfo) {
writer.writeBigSize(0); // Single oracle discriminator
writer.writeBytes(pair.oracleInfo.serializeBody());
} else {
writer.writeBigSize(1); // Multi oracle discriminator
writer.writeBytes(pair.oracleInfo.serializeBody());
}
}
return writer.toBuffer();
}
}
// Legacy support - keeping old class names as aliases (both value and type exports)
export const ContractInfoV0 = SingleContractInfo;
export const ContractInfoV1 = DisjointContractInfo;
export type ContractInfoV0 = SingleContractInfo;
export type ContractInfoV1 = DisjointContractInfo;
interface IContractOraclePair {
contractDescriptor: ContractDescriptor;
oracleInfo: OracleInfo;
}
interface IContractOraclePairJSON {
contractDescriptor: ContractDescriptorV0JSON | ContractDescriptorV1JSON;
oracleInfo: SingleOracleInfoJSON | MultiOracleInfoJSON;
}
// Rust-dlc enum variant format for SingleContractInfo
export interface ISingleContractInfoJSON {
singleContractInfo: {
totalCollateral: number;
contractInfo: {
contractDescriptor: ContractDescriptorV0JSON | ContractDescriptorV1JSON;
oracleInfo: SingleOracleInfoJSON | MultiOracleInfoJSON;
};
};
}
// Rust-dlc enum variant format for DisjointContractInfo
export interface IDisjointContractInfoJSON {
disjointContractInfo: {
totalCollateral: number;
contractInfos: IContractOraclePairJSON[];
};
}
// Legacy type aliases for backward compatibility (same as the new interfaces)
export type IContractInfoV0JSON = ISingleContractInfoJSON;
export type IContractInfoV1JSON = IDisjointContractInfoJSON;
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