RPC接口与ETH接口兼容

[benbaley]

根据提案PIP-2 RPC接口需要做到与ETH接口无缝兼容。
以太坊部分RPC接口的命名空间为'eth'，如‘eth_getBalance’。两个函数的功能一致，因此我们要在命名空间上兼容。
为此，我们通过版本号来区分不同格式的接口调用，其中1.0为PlatON的RPC接口，2.0为以太坊的RPC接口。

示例:

// Request 
curl -X POST --data '{"jsonrpc":"1.0","method":"platon_getBalance","params":["lat1zqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqp7pn3ep", "latest"],"id":1}'

// Result
{
  "id":1,
  "jsonrpc": "1.0",
  "result": "0x0234c8a3397aab58" // 158972490234375000
}

// Result
curl -X POST --data '{"jsonrpc":"1.0", "method": "platon_getStorageAt", "params": ["0x295a70b2de5e3953354a6a8344e616ed314d7251", "0x0", "latest"], "id": 1}' localhost:8545

// Result
{"jsonrpc":"1.0","id":1,"result":"lat1zqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqp7pn3ep"}

兼容以太坊接口的rpc版本,与以太坊现有rpc版本保持一致，均为2.0,示例如下:

// Request
curl -X POST --data '{"jsonrpc":"2.0","method":"eth_getBalance","params":["0x407d73d8a49eeb85d32cf465507dd71d507100c1", "latest"],"id":1}'

// Result
{
  "id":1,
  "jsonrpc": "2.0",
  "result": "0x0234c8a3397aab58" // 158972490234375000
}


curl -X POST --data '{"jsonrpc":"2.0", "method": "eth_getStorageAt", "params": ["0x295a70b2de5e3953354a6a8344e616ed314d7251", "0x0", "latest"], "id": 1}' localhost:8545

{"jsonrpc":"2.0","id":1,"result":"0x00000000000000000000000000000000000000000000000000000000000004d2"}

[benbaley]

close by done