关于智能合约编写/部署以及debug

#0.参考
[1]  [Building an intelligent contract development environment based on testrpc and truffle under Mac](http://www.codeblogbt.com/archives/292379)
#1.编写智能合约/迁移步骤
## 1.1 编写智能合约/迁移脚本
## 1.2 编译
```
truffle compile --all
```

## 1.3 启动测试网络
```
testrpc //或者私链
geth --datadir "./db" --rpc --rpcaddr=0.0.0.0 --rpcport 8545 --rpccorsdomain "*" --rpcapi "eth,net,web3,personal,admin,shh,txpool,debug,miner" --nodiscover --maxpeers --networkid 1981 --port 30303 --mine --minerthreads 1 --etherbase "0xeb680f30715f347d4eb5cd03ac5eced297ac5046" console
truffle migrate --reset
```

## 1.4 迁移

```
truffle migrate --reset
```

#2.相关issue

## 2.1 authentication needed:password or unlock
<center>
![authentication needed:password or unlock](https://leanote.com/api/file/getImage?fileId=5b70dec3ab64412543000546)
</center>

---
对策:

解锁账户:
<center>
![unlockAccount](https://leanote.com/api/file/getImage?fileId=5b711b73ab64412543001139)
</center>

---

## 2.2 exceeds block gas limit
<center>
![exceeds block gas limit](https://leanote.com/api/file/getImage?fileId=5b711c16ab64412739001382)
</center>

---
对策:
>truffle.js
```

networks: {
        development: {
            host: "localhost",
            port: 8545,
            gas:4712388,
            gasPrice:65000000000,
            network_id: "*" // Match any network id
        }
    }
    
```

---

## 2.3 truffle migrate,and stuck there for a long long time

```
#truffle migrate
Running migration: 1_initial_migration.js
Deploying Migrations...
```
<center>
![id-increase](https://leanote.com/api/file/getImage?fileId=5b7406aeab64415efc0023e4)
... Continues like this with the "id" field increasing indefinitely
</center>

>对策:开启挖矿
Truffle was never able to verify the contract was mined successfully.mining
```
truffle migrate --verbose-rp//查看详细过程
miner.start(1)
```

## 2.4 truffle server fsevents is not a constructor
```
TypeError: fsevents is not a constructor
```

>对策:修改cli.bundled.js
```
vim /usr/local/lib/node_modules/truffle/build/cli.bundled.js

// Enable fsevents on OS X when polling isn't explicitly enabled.
//if (undef('useFsEvents')) opts.useFsEvents = !opts.usePolling;

// If we can't use fsevents, ensure the options reflect it's disabled.
//if (!FsEventsHandler.canUse()) opts.useFsEvents = false;
opts.useFsEvents = false;
```

信息安全从业人员^_^

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