encode method

@override Uint8List encode(dynamic value)

ABI-encode value as a 32-byte-aligned Uint8List. For dynamic types, returns the tail; the caller places the offset in the head.

Implementation

@override
Uint8List encode(dynamic value) {
  Uint8List bytes;
  if (value is Uint8List) {
    bytes = value;
  } else if (value is String) {
    bytes = hexDecode(value);
  } else {
    throw ArgumentError('Expected Uint8List or hex String, got ${value.runtimeType}');
  }

  // Length prefix (32 bytes) + data padded to 32-byte boundary.
  final paddedLen = _padTo32(bytes.length);
  final out = Uint8List(32 + paddedLen);
  _writeUint256(out, 0, BigInt.from(bytes.length));
  out.setRange(32, 32 + bytes.length, bytes);
  return out;
}