以太坊部署调用合约

以太坊实验

在自己的电脑上安装配置以太坊开发环境，搭建以太坊私有链，编写一个简单的智能合约，通过以太坊JSON RPC	和JavaScript API编程接口将其部署到所创建的以太坊私有链，并可调用合约获得正确的合约执行结果。
本次作业的最终提交物是一个描述上述过程的完整文档，请把整个过程用文字和截图描述清楚。

本机已经安装go
安装以太坊Ethereum

brew update
brew upgrade
brew tap ethereum/ethereum
brew install ethereum

安装solc编译器

npm install solc

创建账户

geth account new

编写创始块文件

{
    "config": {
        "chainId": 10, 
        "homesteadBlock": 0,
        "eip155Block": 0,
        "eip158Block": 0
    },  
    "nonce": "0x0000000000000042",
    "difficulty": "0x1",
    "alloc": {
            "14b1d82b1c851ea9a6623a20d9865677ecdac70c":{
            "balance": "20000009800000000000000000000"
        },  
            "aa25a7b683fe0564fe6b2a2574e10dc886ecb3ce":{
            "balance": "20000009800000000000000000000"
        }   
    },  
    "mixhash": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "coinbase": "0x0000000000000000000000000000000000000000",
    "timestamp": "0x00",
    "parentHash": "0x0000000000000000000000000000000000000000000000000000000000000000",
    "extraData": "0x11bbe8db4e347b4e8c937c1c8370e4b5ed33adb3db69cbdb7a38e1e50b1b82fa",
    "gasLimit": "0xb2d05e00"
}

配置自动解锁账户的脚本

在~/Library/Ethereum下创建password文件内容为创建账户的密码

编写启动脚本

#!/bin/bash
geth --rpc --rpcaddr="0.0.0.0"  --rpcport "8545" --rpccorsdomain="*" --unlock '0,1' --password ~/Library/Ethereum/password --nodiscover --maxpeers '5' --n    etworkid '123' --datadir '~/Library/Ethereum' console --rpcapi "db,eth,net,web3,personal,admin,miner"

启动网络

./start.sh

通过JRPC与网络交互（均编写在脚本中，方便下次使用）

curl -X POST  -H "Content-Type: application/json"   --data 
'{"jsonrpc":"2.0","method":"eth_getBalance","params":["0x14b1d82b1c851ea9a6623a20d9865677ecdac7    0c","latest"],"id":1}' http://0.0.0.0:8545

返回的结果

localhost:eth liu$ ./curlexample.sh 
{"jsonrpc":"2.0","id":1,"result":"0x409f9fadbc2695e2f02d4a82"}

测试合约，后续需需要通过event的返回log的方式查看调用结果信息

localhost:eth liu$ cat Hello.sol 
pragma solidity ^0.4.17;

contract Hello {

event Print(uint);
function multiply(uint input)public returns (uint) {
emit Print(input * 7);
return input * 7;
}
  //print name
  function print(string name) public pure returns (string) {
    return name;
  }
}

solc编译合约，出现问题,但不影响后续的操作

localhost:eth liu$ solc Hello.sol 
(node:1915) [DEP0013] DeprecationWarning: Calling an asynchronous function without callback is deprecated.
(node:1915) [DEP0013] DeprecationWarning: Calling an asynchronous function without callback is deprecated.
localhost:eth liu$ cat contracts/Hello.sol\:Hello.bin 
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
localhost:eth liu$ 
localhost:eth liu$ cat contracts/Hello.sol\:Hello.abi 
[{"constant":true,"inputs":[{"name":"name","type":"string"}],"name":"print","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"pure","type":"function"},{"constant":false,"inputs":[{"name":"input","type":"uint256"}],"name":"multiply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"anonymous":false,"inputs":[{"indexed":false,"name":"","type":"uint256"}],"name":"Print","type":"event"}]localhost:eth liu$

部署调用合约

localhost:eth liu$ cat  curlsend.sh 
#!/bin/bash
curl -X POST -H "Content-Type: application/json"  --data '{"jsonrpc":"2.0","method":"eth_sendTransaction","params":[{
  "from": "0x14b1d82b1c851ea9a6623a20d9865677ecdac70c",
  "gas": "0x76c000", 
  "data": "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"
 }],"id":1}' http://0.0.0.0:8545
localhost:eth liu$

调用

localhost:eth liu$ ./curlsend.sh 
{"jsonrpc":"2.0","id":1,"result":"0x649cddcacd03f12d860a37b21b47af0ec90375e2eed81c132dc8d451bb09c8e2"}

geth客户端,产生提交的合约地址，后续调用合约要用
```
合约地址0x234C5DB1913e7a046387222eF3960576D22A90c3
```

> INFO [10-27|21:15:22.779] Submitted contract creation              fullhash=0x994e4af5dee931bdec20c422c06b9c58e11a2aa22377b704ea4cb669b230e0ce contract=0x234C5DB1913e7a046387222eF3960576D22A90c3
> txpool.status
{
  pending: 1,
  queued: 0
}
>

启动挖矿，确认交易

> miner.start()
> txpool.status
{
  pending: 0,
  queued: 0
}

调用合约，脚本中to对应的value为合约地址，获得交易的hash值，需要挖矿确认交易

合约地址：0x234C5DB1913e7a046387222eF3960576D22A90c3

调用脚本中的data，为调用合约的签名信息(hash值)，

web3.sha3("multiply(uint256)").substring(0, 8)确定前4字节的数据：0xc6888f
接着需要输入4字节的输入参数数据，假设传入6对应uint256数据为
0000000000000000000000000000000000000000000000000000000000000006
两组hash值拼接即为data数据

localhost:eth liu$ cat curlcall.sh 
#!/bin/bash
curl -X POST -H "Content-Type: application/json"  --data '{"jsonrpc":"2.0","method":"eth_sendTransaction","params":[{
  "from": "0x14b1d82b1c851ea9a6623a20d9865677ecdac70c",
  "to": "0x234C5DB1913e7a046387222eF3960576D22A90c3",
  "data": "0xc6888fa10000000000000000000000000000000000000000000000000000000000000006"
 }],"id":1}' http://0.0.0.0:8545

localhost:eth liu$ ./curlcall.sh 
{"jsonrpc":"2.0","id":1,"result":"0x85dae51f6a405c049c63354f210fd718a043612a2695a65145feaeedac7dec22"}

通过交易的hash值获取交易信息

交易的hash值:
0x85dae51f6a405c049c63354f210fd718a043612a2695a65145feaeedac7dec22

localhost:eth liu$ cat curlget.sh 
#!/bin/bash
curl -X POST -H "Content-Type: application/json"  --data '{"jsonrpc":"2.0","method":"eth_getTransactionReceipt","params":[
 "0x85dae51f6a405c049c63354f210fd718a043612a2695a65145feaeedac7dec22"
],"id":1}' http://0.0.0.0:8545
localhost:eth liu$

查看交易，从logs.data中可以看到结果，该log是通过event的方式返回42(6*7)
```
0x000000000000000000000000000000000000000000000000000000000000002a
```

localhost:eth liu$ ./curlget.sh 
{"jsonrpc":"2.0","id":1,"result":{"blockHash":"0x40b0928fee368e94adfecb3b33d0e29b12a36e5a525e203fd1b4ae2da58ed19e","blockNumber":"0x3ab","contractAddress":null,"cumulativeGasUsed":"0x592a","from":"0x14b1d82b1c851ea9a6623a20d9865677ecdac70c","gasUsed":"0x592a","logs":[{"address":"0x234c5db1913e7a046387222ef3960576d22a90c3","topics":["0x24abdb5865df5079dcc5ac590ff6f01d5c16edbc5fab4e195d9febd1114503da"],"data":"0x000000000000000000000000000000000000000000000000000000000000002a","blockNumber":"0x3ab","transactionHash":"0x85dae51f6a405c049c63354f210fd718a043612a2695a65145feaeedac7dec22","transactionIndex":"0x0","blockHash":"0x40b0928fee368e94adfecb3b33d0e29b12a36e5a525e203fd1b4ae2da58ed19e","logIndex":"0x0","removed":false}],"logsBloom":"0x00000000000000000000000000000000000000000000000000000000000000000000000002000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000020000000000000000000200000000000000000000000002000000000000000000000000000000000000000000000000020000000000000000000000000000000000000000000000000000040000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000","root":"0x00ad10c4db648a69a37fdf87d3cdc29228807e00d9cd7d5d30b957f6303f2e27","to":"0x234c5db1913e7a046387222ef3960576d22a90c3","transactionHash":"0x85dae51f6a405c049c63354f210fd718a043612a2695a65145feaeedac7dec22","transactionIndex":"0x0"}}
localhost:eth liu$

在实验中发现，一些因版本更新造成API发生变化的问题，以及solidity部分语法变化。

以太坊部署调用合约

以太坊实验

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