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import { MessageType } from '../MessageType';
import { getTlv } from '../serialize/getTlv';
import { IDlcMessage } from './DlcMessage';
import {
HyperbolaPayoutCurvePieceJSON,
PayoutCurvePiece,
PolynomialPayoutCurvePieceJSON,
} from './PayoutCurvePiece';
export abstract class PayoutFunction {
public static deserialize(buf: Buffer): PayoutFunctionV0 {
const reader = new BufferReader(buf);
const type = Number(reader.readBigSize());
switch (type) {
case MessageType.PayoutFunctionV0:
return PayoutFunctionV0.deserialize(buf);
default:
throw new Error(`Payout function TLV type must be PayoutFunctionV0`);
}
}
public abstract type: number;
public abstract length: bigint;
public abstract toJSON(): PayoutFunctionV0JSON;
public abstract serialize(): Buffer;
}
/**
* PayoutFunction V0
*/
export class PayoutFunctionV0 extends PayoutFunction implements IDlcMessage {
public static type = MessageType.PayoutFunctionV0;
/**
* Deserializes an payout_function_v0 message
* @param buf
*/
public static deserialize(buf: Buffer): PayoutFunctionV0 {
const instance = new PayoutFunctionV0();
const reader = new BufferReader(buf);
reader.readBigSize(); // read type
instance.length = reader.readBigSize(); // need to fix this
reader.readUInt16BE(); // num_pieces
instance.endpoint0 = reader.readBigSize();
instance.endpointPayout0 = reader.readBigSize();
instance.extraPrecision0 = reader.readUInt16BE();
while (!reader.eof) {
const payoutCurvePiece = PayoutCurvePiece.deserialize(getTlv(reader));
const endpoint = reader.readBigSize();
const endpointPayout = reader.readBigSize();
const extraPrecision = reader.readUInt16BE();
instance.pieces.push({
payoutCurvePiece,
endpoint,
endpointPayout,
extraPrecision,
});
}
return instance;
}
/**
* The type for payout_function_v0 message. payout_function_v0 = 42790
*/
public type = PayoutFunctionV0.type;
public length: bigint;
public endpoint0: bigint;
public endpointPayout0: bigint;
public extraPrecision0: number;
public pieces: IPayoutCurvePieces[] = [];
/**
* Converts payout_function_v0 to JSON
*/
public toJSON(): PayoutFunctionV0JSON {
return {
type: this.type,
endpoint0: Number(this.endpoint0),
endpointPayout0: Number(this.endpointPayout0),
extraPrecision0: this.extraPrecision0,
pieces: this.pieces.map((piece) => {
return {
payoutCurvePiece: piece.payoutCurvePiece.toJSON(),
endpoint: Number(piece.endpoint),
endpointPayout: Number(piece.endpointPayout),
extraPrecision: piece.extraPrecision,
};
}),
};
}
/**
* Serializes the payout_function_v0 message into a Buffer
*/
public serialize(): Buffer {
const writer = new BufferWriter();
writer.writeBigSize(this.type);
const dataWriter = new BufferWriter();
dataWriter.writeUInt16BE(this.pieces.length);
dataWriter.writeBigSize(this.endpoint0);
dataWriter.writeBigSize(this.endpointPayout0);
dataWriter.writeUInt16BE(this.extraPrecision0);
for (const piece of this.pieces) {
dataWriter.writeBytes(piece.payoutCurvePiece.serialize());
dataWriter.writeBigSize(piece.endpoint);
dataWriter.writeBigSize(piece.endpointPayout);
dataWriter.writeUInt16BE(piece.extraPrecision);
}
writer.writeBigSize(dataWriter.size);
writer.writeBytes(dataWriter.toBuffer());
return writer.toBuffer();
}
}
interface IPayoutCurvePieces {
payoutCurvePiece: PayoutCurvePiece;
endpoint: bigint;
endpointPayout: bigint;
extraPrecision: number;
}
interface IPayoutCurvePiecesJSON {
payoutCurvePiece:
| PolynomialPayoutCurvePieceJSON
| HyperbolaPayoutCurvePieceJSON;
endpoint: number;
endpointPayout: number;
extraPrecision: number;
}
export interface PayoutFunctionV0JSON {
type: number;
endpoint0: number;
endpointPayout0: number;
extraPrecision0: number;
pieces: IPayoutCurvePiecesJSON[];
}
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