EVM兼容思路

EVM结构.png

对于EVM虚拟机，觉得可以从两方面进行抽象，实现拓展；

1. VM层进行抽象，从根本上来说，EVM只对外暴漏了两个方法调用Call、Create.

   type VM interface{
       Create(caller types.ContractRef, code []byte, gas uint64, val sdk.Int) (ret []byte, contractAddr sdk.AccAddress, gasLeft uint64, err error)
     
       Call(caller types.ContractRef, toAddr sdk.AccAddress, input []byte, gas uint64, val sdk.Int) (ret []byte, gasLeft uint64, err error)
   }
   

2. 解释器层抽象，解释器的功能比较单纯，给定合约和输入，得到输出。

   type Interpreter interface {
       Run(contract *Contract, input []byte, static bool) ([]byte, error)
   }