# All files / lib/messages CetAdaptorSignaturesV0.ts

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     import { BufferReader, BufferWriter } from '@node-dlc/bufio';

    import { MessageType } from '../MessageType';
    import { IDlcMessage } from './DlcMessage';

    /**
     * CetAdaptorSignatures V0 contains CET signatures and any necessary
     * information linking the signatures to their corresponding outcome
     */
    export class CetAdaptorSignaturesV0 implements IDlcMessage {
      public static type = MessageType.CetAdaptorSignaturesV0;

      /**
       * Deserializes a cet_adaptor_signature_v0 message
       * @param buf
       */
      public static deserialize(buf: Buffer): CetAdaptorSignaturesV0 {
        const instance = new CetAdaptorSignaturesV0();
        const reader = new BufferReader(buf);

        reader.readBigSize(); // read type
        instance.length = reader.readBigSize();
        reader.readBigSize(); // nb_signatures

        while (!reader.eof) {
          const encryptedSig = reader.readBytes(65);
          const dleqProof = reader.readBytes(97);
          instance.sigs.push({ encryptedSig, dleqProof });
        }

        return instance;
      }

      /**
       * The type for cet_adaptor_signature message. cet_adaptor_signature = 42774
       */
      public type = CetAdaptorSignaturesV0.type;

      public length: bigint;

      public sigs: ISig[] = [];

      /**
       * Converts cet_adaptor_signature to JSON
       */
      public toJSON(): ICetAdaptorSignaturesV0JSON {
        return {
          type: this.type,
          sigs: this.sigs.map((sig) => {
            return {
              encryptedSig: sig.encryptedSig.toString('hex'),
              dleqProof: sig.dleqProof.toString('hex'),
            };
          }),
        };
      }

      /**
       * Serializes the cet_adaptor_signature message into a Buffer
       */
      public serialize(): Buffer {
        const writer = new BufferWriter();
        writer.writeBigSize(this.type);

        const dataWriter = new BufferWriter();
        dataWriter.writeBigSize(this.sigs.length);

        for (const sig of this.sigs) {
          dataWriter.writeBytes(sig.encryptedSig);
          dataWriter.writeBytes(sig.dleqProof);
        }

        writer.writeBigSize(dataWriter.size);
        writer.writeBytes(dataWriter.toBuffer());
        return writer.toBuffer();
      }
    }

    interface ISig {
      encryptedSig: Buffer;
      dleqProof: Buffer;
    }

    export interface ICetAdaptorSignaturesV0JSON {
      type: number;
      sigs: ISigJSON[];
    }

    export interface ISigJSON {
      encryptedSig: string;
      dleqProof: string;
    }