JSON RPC

与eth节点沟通的桥梁, 下面是使用curl访问节点数据的例子:

1. web3_clientVersion获取eth节点客户端的版本. 例如Geth v.1.11.6、Erigon等

   curl --location --request POST 'https://rpc.ankr.com/eth' \
   --header 'Content-Type: application/json' \
   --data-raw '{
   "jsonrpc": "2.0",
   "method": "web3_clientVersion",
   "params": [],
   "id": 1
   }'

2. eth_gasPrice获取gas的单价(猜测是最新块的baseFee+MaxPriorityFee)

curl --location --request POST 'https://rpc.ankr.com/eth' \
--header 'Content-Type: application/json' \
--data-raw '[
    {
        "jsonrpc": "2.0",
        "method": "eth_gasPrice",
        "params": [],
        "id": 1
    }
]'

3. eth_accounts在客户端解锁的账户

curl --location --request POST 'https://rpc.ankr.com/eth' \
--header 'Content-Type: application/json' \
--data-raw '[
    {
        "jsonrpc": "2.0",
        "method": "eth_accounts",
        "params": [],
        "id": 1
    }
]'

4. eth_blockNumber返回客户端区块的高度, 有可能会落后因为还没同步最新的

curl --location --request POST 'https://rpc.ankr.com/eth' \
--header 'Content-Type: application/json' \
--data-raw '[
    {
        "jsonrpc": "2.0",
        "method": "eth_blockNumber",
        "params": [],
        "id": 1
    }
]'

5. eth_getBalance获取账户余额, 可以指定blockNumber

curl --location --request POST 'https://rpc.ankr.com/eth' \
--header 'Content-Type: application/json' \
--data-raw '[
    {
        "jsonrpc": "2.0",
        "method": "eth_getBalance",
        "params": [
            "0x407d73d8a49eeb85d32cf465507dd71d507100c1",
            "latest"
        ],
        "id": 1
    }
]'

6. eth_sign对数据进行签名(已过期)

   curl --location --request POST 'https://rpc.ankr.com/eth' \
   --header 'Content-Type: application/json' \
   --data-raw '[
   {
       "jsonrpc": "2.0",
       "method": "eth_sign",
       "params": [
           "0x9b2055d370f73ec7d8a03e965129118dc8f5bf83",
           "0xdeadbeaf"
       ],
       "id": 1
   }
   ]'

7. eth_signTransaction对一个交易进行签名(已过期, 没有用到私钥, 猜测是在eth客户端使用已解锁的账户进行签名)

   curl --location --request POST 'https://rpc.ankr.com/eth' \
   --header 'Content-Type: application/json' \
   --data-raw '[
   {
       "jsonrpc": "2.0",
       "method": "eth_signTransaction",
       "params": [
           {
               "data": "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675",
               "from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
               "gas": "0x76c0",
               "gasPrice": "0x9184e72a000",
               "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
               "value": "0x9184e72a"
           }
       ],
       "id": 1
   }
   ]'

8. eth_sendTransaction发送交易信息(签名问题同上)

   curl --location --request POST 'https://rpc.ankr.com/eth' \
   --header 'Content-Type: application/json' \
   --data-raw '[
   {
       "jsonrpc": "2.0",
       "method": "eth_sendTransaction",
       "params": [
           {
               "data": "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675",
               "from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
               "gas": "0x76c0",
               "gasPrice": "0x9184e72a000",
               "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
               "value": "0x9184e72a"
           }
       ],
       "id": 1
   }
   ]'

9. eth_sendRawTransaction发送签过名的交易, 返回hash需要使用eth_getTransactionReceipt获取详情数据

   curl --location --request POST 'https://rpc.ankr.com/eth' \
   --header 'Content-Type: application/json' \
   --data-raw '[
   {
       "jsonrpc": "2.0",
       "method": "eth_sendRawTransaction",
       "params": [ "0xa3f20717a250c2b0b729b7e5becbff67fdaef7e0699da4de7ca5895b02a170a12d887fd3b17bfdce3481f10bea41f45ba9f709d39ce8325427b57afcfc994cee1b"
       ],
       "id": 1
   }
   ]'

10. eth_call仅在客户端执行,并不发送交易到区块链网络, 虽然是在本地执行在发送tx时也要注意账户余额是否充足保证能执行完毕.

curl --location --request POST 'https://rpc.ankr.com/eth' \
--header 'Content-Type: application/json' \
--data-raw '[
    {
        "jsonrpc": "2.0",
        "method": "eth_call",
        "params": [
            {
                "data": "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675",
                "from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
                "gas": "0x76c0",
                "gasPrice": "0x9184e72a000",
                "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
                "value": "0x0"
            },
            "latest"
        ],
        "id": 1
    }
]'

11. eth_estimateGas估算执行合约代码需要的gas数量

curl --location --request POST 'https://rpc.ankr.com/eth' \
--header 'Content-Type: application/json' \
--data-raw '[
    {
        "jsonrpc": "2.0",
        "method": "eth_estimateGas",
        "params": [
            {
                "data": "0xd46e8dd67c5d32be8d46e8dd67c5d32be8058bb8eb970870f072445675058bb8eb970870f072445675",
                "from": "0xb60e8dd61c5d32be8058bb8eb970870f07233155",
                "gas": "0x76c0",
                "gasPrice": "0x9184e72a000",
                "to": "0xd46e8dd67c5d32be8058bb8eb970870f07244567",
                "value": "0x0"
            },
            "latest"
        ],
        "id": 1
    }
]'

12. eth_getTransactionReceipt根据交易hash获取交易详情

curl --location --request POST 'https://rpc.ankr.com/eth' \
--header 'Content-Type: application/json' \
--data-raw '[
    {
        "jsonrpc": "2.0",
        "method": "eth_getTransactionReceipt",
        "params": [
            "0x85d995eba9763907fdf35cd2034144dd9d53ce32cbec21349d4b12823c6860c5"
        ],
        "id": 1
    }
]'

参考： https://ethereum.org/en/developers/docs/apis/json-rpc/#eth_estimategas