以太坊节点geth json rpc使用指南

1. 参考

   • https://github.com/ethereum/go-ethereum/wiki/Management-APIs
   • https://github.com/ethereum/wiki/wiki/JSON-RPC
   • https://solidity.readthedocs.io/en/develop/abi-spec.html

2. 新建账号

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       curl -X POST --data '{
         "jsonrpc": "2.0",
         "method": "personal_newAccount",
         "params": ["hello"],     // 新帐户密码
         "id": 3
   
   }' localhost:8545
   `返回结果`
   {
   "id": 4,
   "jsonrpc": "2.0",
   "result": "0xb14dc5a4bba7fc2796b41543c76aa7da732a7271" // 新帐户地址
   }
   

   1 2	3. #### 查询余额

   {
   “jsonrpc”: “2.0”,
   “method”: “eth_getBalance”,
   “params”: [“0x627306090abaB3A6e1400e9345bC60c78a8BEf57”], //帐户地址
   “id”: 3
   }

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   返回结果

   {
   “id”: 3,
   “jsonrpc”: “2.0”,
   “result”: “0x00000000000000056bc75e2d63100000” //以wei为单位，十六进制形式，转换成十进制为 100000000000000000000，即100ETH
   }

   1 2	4. #### 以太币转账

   curl -X POST –data ‘{
   “jsonrpc”: “2.0”,
   “method”: “eth_sendTransaction”,
   “params”: [{

   "from": "0x627306090abaB3A6e1400e9345bC60c78a8BEf57",   // 转出帐户
   "to": "0xf17f52151EbEF6C7334FAD080c5704D77216b732",     // 转入帐户
   "gas": "0x76c0",                                        // gas
   "gasPrice": "0x9184e72a000",                            // gas单价
   "value": "0x8AC7230489E80000",                          // 转账金额
   "data": "0x0"

   }],
   “id”: 3}’ localhost:8545

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   返回结果

   {
   “id”: 3,
   “jsonrpc”: “2.0”,
   “result”: “0x126bd21f39f23b7c6df8fe3e205fd592fe9dcb47abb3e356b96bff98ea58e137” // 交易Hash
   }

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   5. #### Token 转账 * Token信息

   Token contract address:  0x8cdaf0cd259887258bc13a92c0a6da92698644c0
   Token 代号: JXC
   Token decimals(小数点位数): 2
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   * 信息结构
   
   接收地址：　0xf17f52151EbEF6C7334FAD080c5704D77216b732    (40字母长度)
   value:  128
   data内容拼接：
   0xa9059cbb +  左补位token接收地址 + 左补位value
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   * 信息具体构造方法
   
   其中token接收地址和value要在前面补0，直到长度满足64个字母，如下：
   
   Token地址前要加24个0，
   
   value作如下转换： 128*10^合约的小数位，这里是2，转成16进制，再在前面补0，长度满足64位字母
   128*100 = 12800
   hex(12800) = 3200
   
   data内容最终为：

   0xa9059cbb000000000000000000000000f17f52151EbEF6C7334FAD080c5704D77216b7320000000000000000000000000000000000000000000000000000000000003200

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   * curl请求示例 ``` curl -X POST --data '{ "jsonrpc": "2.0", "method": "eth_sendTransaction", "params": [{ "from": "0x627306090abaB3A6e1400e9345bC60c78a8BEf57", // 转出帐户 "to": "0x8cdaf0cd259887258bc13a92c0a6da92698644c0", // Token合约地址 "gas": "0x186A0", // gas "gasPrice": "0x9184e72a000", // gas单价 "value": "0x0", // "data": "0xa9059cbb000000000000000000000000f17f52151EbEF6C7334FAD080c5704D77216b7320000000000000000000000000000000000000000000000000000000000003200" }], "id": 3}' localhost:8545 ``` 返回结果 ``` { "id": 5, "jsonrpc": "2.0", "result": "0x7f68504a79cc20aff446e8a8799845f8c1a9433c34644dcf5b7876fd1bcba30a" // 交易号 } ```

6) #### 获取 Token 余额

• Token 信息

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  Token contract address: 0x8cdaf0cd259887258bc13a92c0a6da92698644c0 Token 代号: JXC Token decimals(小数点位数): 2

• 信息结构

  1 2	data 数据拼接： 0x70a08231 + 左补位的地址

• curl 示例

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  curl -X POST --data '{ "jsonrpc": "2.0", "method": "eth_call", "params": [{ "from": "0x627306090abaB3A6e1400e9345bC60c78a8BEf57", // 帐户 "to": "0x8cdaf0cd259887258bc13a92c0a6da92698644c0", // Token合约地址 "value": "0x0", // "data": "0x70a08231000000000000000000000000f17f52151EbEF6C7334FAD080c5704D77216b732" }], "id": 3}' localhost:8545

• 返回结果

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  { "id": 3, "jsonrpc": "2.0", "result": "0x0000000000000000000000000000000000000000000000000000000000003200" }

• 提取结果

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  3200转十进制/10^2(Token小数点位数) 0x3200 = 12800 12800 / 100 = 128 个JXC