`Signature`

Definition

This is uses a custom implemention of ecdsa signer using the Secp256k1 curve. Zabi supports both normal signatures and compact ones.

const Signature = struct {
  r: [Secp256k1.scalar.encoded_length]u8,
  s: [Secp256k1.scalar.encoded_length]u8,
  v: u2,
}

const CompactSignature = struct {
  r: [Secp256k1.scalar.encoded_length]u8,
  yParityWithS: [Secp256k1.scalar.encoded_length]u8,
}

Usage

These types have some methods that can be used to convert from one to the other and to convert to Bytes or Hex.

toCompact and fromCompact

Converts a Signature to a CompactSignature or vice versa.

signature.zig

const sig: CompactSignature = .{
  .r = &[_]u8{0} ** 32,
  .yParityWithS = &[_]u8{0} ** 32,
}
 
try Signature.fromCompact(sig);
 
// Result
// const sig: Signature = .{
//  .r = &[_]u8{0} ** 32,
//  .s = &[_]u8{0} ** 32,
//  .v = 0
// }

toBytes

Converts a Signature or CompactSignature to a [65]u8 byte array.

signature.zig

const sig: Signature = .{
 .r = &[_]u8{0} ** 32,
 .s = &[_]u8{0} ** 32,
 .v = 0
}
 
try sig.toBytes();
// Result
// [_]u8{0} ** 65

toHex

Converts a Signature or CompactSignature to a Hex string.

signature.zig

const sig: Signature = .{
 .r = &[_]u8{0} ** 32,
 .s = &[_]u8{0} ** 32,
 .v = 0
}
 
try sig.toHex();
// Result
// &[_]u8{0} ** 130