WaykiChain v2.0 (teng) update

1, add new signature of cdp, dex, assert, transfer, call smartcontract.
2, add decode txraw
3, add verify sign message.

Transaction-Fees-Update-Release

• fix RegId length VarInt calculation issue
• raw tx must be generated with tx fees
• improve interface
• add more demo code

md5sum of wicc-wallet-utils-1.2.0.jar: 278e95d828efd70aed161374e8561392

Fixing core-class missing

Core class was unfortunately not included when whole project was assembled in the first release. This release brings back the core class in the library.

1st-release

Offline wallet utilities that can generate wallet address and digitally signed transaction raw string value