ecSigToDER static method
ECSignature to DER format bytes
Implementation
static Uint8List ecSigToDER(ECSignature ecSig) {
List<int> r = AMAXKey.toSigned(encodeBigInt(ecSig.r));
List<int> s = AMAXKey.toSigned(encodeBigInt(ecSig.s));
List<int> b = <int>[];
b.add(0x02);
b.add(r.length);
b.addAll(r);
b.add(0x02);
b.add(s.length);
b.addAll(s);
b.insert(0, b.length);
b.insert(0, 0x30);
return Uint8List.fromList(b);
}