Sign : Equivalence js method

[redDwarf03]

Hello

I try to find an equivalence in dart of this js method :

 sign(hash, key) {

    const { signature, recid } = secp256k1.ecdsaSign(
      new Uint8Array(hash),
      hexToUint8Array(key)
    );

    this.signature = Buffer.from([...signature, recid]);

    return this;
  }

this part is complicated to code for me: "Buffer.from([...signature, recid])" in dart and I don't know how to retrieve recid with your code.

Could you help me please ?

[redDwarf03]

i find the solution in this project https://github.com/shareven/wallet_hd