sign method
Implementation
@override
String sign(String txData) {
final msg = processMessage(txData);
switch (this._scheme) {
case DotScheme.sr25519:
final signature = SR25519.sign(privateKey, msg);
return dynamicToString(signature);
case DotScheme.ed25519:
final signature = ED25519.sign(privateKey, msg);
return dynamicToString(signature);
}
}