Library doesn't work with dart 2 and Flutter

[badboy-tian]

compiler message: file:///Users/tian/.pub-cache/hosted/pub.dartlang.org/web3dart-0.2.1/lib/src/web3client.dart:145:32: Error: A value of type '(dart.core::String) ??? dart.core::List<dart.core::int>' can't be assigned to a variable of type '(dynamic) ??? dart.async::FutureOr<dart.core::List<dart.core::int>>'.
compiler message: Try changing the type of the left hand side, or casting the right hand side to '(dynamic) ??? dart.async::FutureOr<dart.core::List<dart.core::int>>'.
compiler message: 					blockParam]).then(numbers.hexToBytes);

[badboy-tian]

compiler message: file:///Users/tian/.pub-cache/hosted/pub.dartlang.org/pointycastle-0.11.1/lib/macs/hmac.dart:82:28: Error: The parameter 'params' of the method 'HMac::init' has type pointycastle.api::KeyParameter, which does not match the corresponding type in the overridden method (pointycastle.api::CipherParameters).
compiler message: Change to a supertype of pointycastle.api::CipherParameters (or, for a covariant parameter, a subtype).
compiler message:     void init(KeyParameter params) {
compiler message:                            ^
compiler message: file:///Users/tian/.pub-cache/hosted/pub.dartlang.org/pointycastle-0.11.1/lib/src/api/mac.dart:26:8: Context: This is the overriden method ('init').
compiler message:   void init(CipherParameters params);
compiler message:        ^
compiler message: file:///Users/tian/.pub-cache/hosted/pub.dartlang.org/pointycastle-0.11.1/lib/signers/ecdsa_signer.dart:129:55: Error: The parameter 'signature' of the method 'ECDSASigner::verifySignature' has type pointycastle.api.ecc::ECSignature, which does not match the corresponding type in the overridden method (pointycastle.api::Signature).
compiler message: Change to a supertype of pointycastle.api::Signature (or, for a covariant parameter, a subtype).
compiler message:   bool verifySignature(Uint8List message, ECSignature signature) {
compiler message:                                                       ^

[simolus3]

The crypto library used by this project isn't ready for dart 2 (which Flutter uses by default) yet. When PointyCastle/pointycastle#122 lands, I will upgrade this library so that it will work with Flutter.

If you urgently need to use this library, consider disabling dart 2 for Flutter with this guide. I will close this issue when this library and all its dependencies support dart 2, although that might break backwards-compatibility for some APIs.

[badboy-tian]

Thank you

[badboy-tian]

@simolus3 Hi, the PointyCastle has a RC version solved the dart 2 problem. PointyCastle/pointycastle#125

[badboy-tian]

@simolus3 can you please fix this issue ? thank you very much

[simolus3]

It should be fixed in version 0.3.0 of this library which is now out on pub. Let me know if you run into any further issues.