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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 | 1x 1x 1x 1x 1x 4x 4x 4x 4x 4x 4x 3x 3x 4x 4x 3x 3x 4x 4x 4x 10x 10x 10x 4x 8x 8x 8x 8x 2x 10x 10x 10x 10x 10x 9x 9x 10x 10x 9x 9x 10x 10x 10x 28x 28x 28x 10x 10x 10x | import { Value } from '@node-dlc/bitcoin';
import { BufferReader, BufferWriter } from '@node-dlc/bufio';
import { MessageType } from '../MessageType';
import { IDlcMessage } from './DlcMessage';
/**
* The BatchFundingGroup TLV contains information about the intent to
* enter multiple DLCs simulatenously within one batch dlc funding
* transaction in the contract negotiation stage of the peer protocol
*
* This is the first step toward creating a batch dlc funding transaction
*
* A DlcOffer or DlcAccept can contain one or multiple BatchFundingInfo
* TLVs to specify one or more groupings. This allows specification of
* collateral put towards different types of contracts, such as options
* contracts, futures contracts, or other investment types.
*
* Attributes:
* - tempContractIds: Temporary identifiers for contracts proposed in DlcOffers.
* - contractIds: Identifiers for contracts that have been accepted and are
* part of the funding transaction. These are derived from DlcOffers and DlcAccepts.
* - allocatedCollateral: The amount of collateral allocated to the contracts
* within this group. This is specified early in the negotiation process.
* - eventIds: Oracle event identifiers for the contracts in this group. These
* are also specified early in the negotiation process.
*
* Note: During the early stages of the negotiation protocol, only allocatedCollateral
* and eventIds are specified. tempContractIds and contractIds are added to the
* DlcAccept upon creation.
*/
export class BatchFundingGroup implements IDlcMessage {
public static type = MessageType.BatchFundingGroup;
/**
* Deserializes a batch_contract_info message
* @param buf
*/
public static deserialize(buf: Buffer): BatchFundingGroup {
const instance = new BatchFundingGroup();
const reader = new BufferReader(buf);
reader.readBigSize(); // read type
instance.length = reader.readBigSize();
const tempContractIdsCount = reader.readBigSize();
for (let i = 0; i < Number(tempContractIdsCount); i++) {
const length = reader.readBigSize();
instance.tempContractIds.push(reader.readBytes(Number(length)));
}
const contractIdsCount = reader.readBigSize();
for (let i = 0; i < Number(contractIdsCount); i++) {
const length = reader.readBigSize();
instance.contractIds.push(reader.readBytes(Number(length)));
}
instance.allocatedCollateral = Value.fromSats(reader.readUInt64BE());
const eventIdsCount = reader.readBigSize();
for (let i = 0; i < Number(eventIdsCount); i++) {
const eventIdLength = reader.readBigSize();
const eventIdBuf = reader.readBytes(Number(eventIdLength));
instance.eventIds.push(eventIdBuf.toString());
}
return instance;
}
/**
* The type for batch_contract_info message.
*/
public type = BatchFundingGroup.type;
public length: bigint;
public tempContractIds: Buffer[] = [];
public contractIds: Buffer[] = [];
public allocatedCollateral: Value;
public eventIds: string[] = [];
/**
* Converts batch_funding_info to JSON
*/
public toJSON(): IBatchFundingGroupJSON {
return {
type: this.type,
tempContractIds: this.tempContractIds.map((id) => id.toString('hex')),
contractIds: this.contractIds.map((id) => id.toString('hex')),
totalCollateral: Number(this.allocatedCollateral.sats),
eventIds: this.eventIds,
};
}
/**
* Serializes the batch_funding_info message into a Buffer
*/
public serialize(): Buffer {
const writer = new BufferWriter();
writer.writeBigSize(this.type);
const dataWriter = new BufferWriter();
dataWriter.writeBigSize(this.tempContractIds.length);
this.tempContractIds.forEach((id) => {
dataWriter.writeBigSize(id.length);
dataWriter.writeBytes(id);
});
dataWriter.writeBigSize(this.contractIds.length);
this.contractIds.forEach((id) => {
dataWriter.writeBigSize(id.length);
dataWriter.writeBytes(id);
});
dataWriter.writeUInt64BE(this.allocatedCollateral.sats);
dataWriter.writeBigSize(this.eventIds.length);
this.eventIds.forEach((id) => {
const idBuffer = Buffer.from(id);
dataWriter.writeBigSize(id.length);
dataWriter.writeBytes(idBuffer);
});
writer.writeBigSize(dataWriter.size);
writer.writeBytes(dataWriter.toBuffer());
return writer.toBuffer();
}
}
export interface IBatchFundingGroupJSON {
type: number;
tempContractIds: string[];
contractIds: string[];
totalCollateral: number;
eventIds: string[];
}
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