keyToString function
Implementation
String keyToString(IKey key, String suffix, String prefix) {
var digest = digestSuffixRipemd160(key.data, suffix);
var whole = Uint8List(key.data.length + 4);
for (var i = 0; i < key.data.length; ++i) {
whole[i] = key.data[i];
}
for (var i = 0; i < 4; ++i) {
whole[i + key.data.length] = digest[i];
}
return prefix + binaryToBase58(whole);
}