eos.png
目录
EOS开发(1) -- 安装及常用工具介绍
EOS开发(2) -- 发布智能合约
EOS开发(3) -- currency合约分析
之前我写过一篇文章,如何在以太坊上构建dapp,感兴趣的可以先去看下以太坊上如何编写发布智能合约的,eos现在测试链3.0还没有发布,所以相比以太坊来说工具还不完善,所以想要深入了解的话需要花点功夫研究.
EOS 常用命令介绍
- eosd
eosd 是 eos的核心后台进程，想钱包账户查询服务,生产区块服务都是依赖这个进程的启动
- eosc
eosc 用来和eosd暴露出的rest接口交互的一个命令行工具为了使用eosc,
你需要指定eosd实例的ip地址和端口号,执行以下eosc可以看到下面列出的各种用法
$ ./eosc
ERROR: RequiredError: Subcommand required
Command Line Interface to Eos Client
Usage: ./eosc [OPTIONS] SUBCOMMAND
Options:
-h,--help Print this help message and exit
# 下面这个用来指定eosd实例ip,默认本地地址
-H,--host TEXT=localhost the host where eosd is running 这
# 下面用来指定端口号 默认 8888
-p,--port UINT=8888 the port where eosd is running
--wallet-host TEXT=localhost
the host where eos-walletd is running
--wallet-port UINT=8888 the port where eos-walletd is running
-v,--verbose output verbose messages on error
Subcommands:
# 获取版本信息
version Retrieve version information
# 创建钱包 或者账户等命令
create Create various items, on and off the blockchain
# 去区块链上查询的命令
get Retrieve various items and information from the blockchain
# 发布或者更新智能合约命令
set Set or update blockchain state
# 账户间转账的命令
transfer Transfer EOS from account to account
# 点对点网络节点交互连接的命令
net Interact with local p2p network connections
# 和钱包交互的命令
wallet Interact with local wallet
# 执行基准测试的命令
benchmark Configure and execute benchmarks
# 推消息到链上的命令
push Push arbitrary transactions to the blockchain
发布合约前准备工作
- 创建一个钱包
创建钱包前我们需要知道一个钱包可能有多个账户,账户之间是交互的主体,eos可以锁定钱包来控制该钱包下所有账户资金的安全,所以首先我们需要创建一个钱包,然后再创建一些账户，把这些账户的私钥导入到钱包中
cd ~/eos/build/programs/eosc/
./eosc wallet create
上面命令会输出一个密码 这个密码是用来锁定或者介绍钱包用的 这个需要保存好,而且会生成一个名为的default钱包
- 此时我们default钱包里没有账户所以我们要导入一个账户,还记得上一节我们备份的genisis.json.back那个文件吗，这个文件中有个inita账户的私钥,我们可以把它导入到我们的钱包中
./eosc wallet import 5KQwrPbwdL6PhXujxW37FSSQZ1JiwsST4cqQzDeyXtP79zkvFD3
- 创建秘钥对
因为eos提供了权限控制的概念,提供了有owner 和 active的角色,owner代表所有者,active代表可以操作(其实这两个都是特别高的权限,都能做任何交易上的操作,只是owner权限更高一点)，eos 创建账户需要指定 owner key 和 active key，所以我们需要先创建两对key
cd ~/eos/build/programs/eosc/
$ ./eosc create key
Private key: 5JL6auvLndKnbtTk63EjPFVZ2giFKiUZo97siZx5PXcXsbQVEcq
Public key: EOS5U7dBVwkwiUvsBBYuhR2yhkWYXYCK5mi6JgZjE7jwvXyxbArd1 # owner key
$ ./eosc create key
Private key: 5JXgdQwueP9WNXpYWkQkRgL18LEvVy4e9KwyAPzdVxdT9ibqVDW
Public key: EOS5HUmMgJRoxiuPdeiGpbCJvQ7pGkSAEKV45d1WVbkkN8vFHWjYJ # active key
每执行一次create key ,都会生成一对公私钥对
- 创建账户
./eosc create account inita test PUBLIC_KEY_1(owner_key) PUBLIC_KEY_2(active_key)
上面的命令相当于创建了一个test用户,因为inita是我们已经导入进来的,这里inita可以当做test的创建者,key1，key2把我们上面生成的两个公钥输入进去就ok了
$ ./eosc create account inita test EOS5U7dBVwkwiUvsBBYuhR2yhkWYXYCK5mi6JgZjE7jwvXyxbArd1 EOS5HUmMgJRoxiuPdeiGpbCJvQ7pGkSAEKV45d1WVbkkN8vFHWjYJ
441183ms main.cpp:1195 main ] Failed with error: Assert Exception (10)
status_code == 200: Error code 401
: {"code":401,"message":"UnAuthorized","details":"signatures do not satisfy declared authorizations (3030002)\nTransaction declares authority '{\"account\":\"inita\",\"permission\":\"active\"}', but does not have signatures for it.\n"}
参数替换，执行后我们发现上面执行失败，提示未授权,其实是我们还没有把刚刚创建的active 秘钥导入钱包
- 导入创建的active key 秘钥到钱包
$ ./eosc wallet import 5JXgdQwueP9WNXpYWkQkRgL18LEvVy4e9KwyAPzdVxdT9ibqVDW
imported private key for: EOS5HUmMgJRoxiuPdeiGpbCJvQ7pGkSAEKV45d1WVbkkN8vFHWjYJ
可以看到导入成功
- 再次执行创建账户 test
$ ./eosc create account inita test EOS5U7dBVwkwiUvsBBYuhR2yhkWYXYCK5mi6JgZjE7jwvXyxbArd1 EOS5HUmMgJRoxiuPdeiGpbCJvQ7pGkSAEKV45d1WVbkkN8vFHWjYJ
{
"transaction_id": "76f574b783e3c67599047009c84acb72e2be3d1c08c1b5e6f303d0f19be99b60",
"processed": {
"ref_block_num": 36260,
"ref_block_prefix": 3203619337,
"expiration": "2018-03-14T15:19:25",
"scope": [
"eos",
"inita"
],
"signatures": [
"20422d4f3f4900344ef774c65e5704fa1abea3796e9353eda466478b80d47d59e54d00cd9e1c65a3507242cb91eebc0f52334d21f129db1494ee3d832ddf9b85ac"
],
"messages": [{
"code": "eos",
"type": "newaccount",
"authorization": [{
"account": "inita",
"permission": "active"
}
],
"data": {
"creator": "inita",
"name": "test",
"owner": {
"threshold": 1,
"keys": [{
"key": "EOS5U7dBVwkwiUvsBBYuhR2yhkWYXYCK5mi6JgZjE7jwvXyxbArd1",
"weight": 1
}
],
"accounts": []
},
"active": {
"threshold": 1,
"keys": [{
"key": "EOS5HUmMgJRoxiuPdeiGpbCJvQ7pGkSAEKV45d1WVbkkN8vFHWjYJ",
"weight": 1
}
],
"accounts": []
},
"recovery": {
"threshold": 1,
"keys": [],
"accounts": [{
"permission": {
"account": "inita",
"permission": "active"
},
"weight": 1
}
]
},
"deposit": "0.0001 EOS"
},
"hex_data": "000000000093dd74000000000090b1ca0100000001024c59ba35833eabc71d794ed79ba8ab26a232ddd4c4790c2282f20200cc0baf73010000010000000102343387e05944b65216def1599960aca2d6a03adcfd37930b5aac21b97f4c5839010000010000000001000000000093dd7400000000a8ed32320100010000000000000004454f5300000000"
}
],
"output": [{
"notify": [],
"deferred_trxs": []
}
]
}
}
可以看到执行成功了,是这样的创建账户前需要创建者账户里有钱,因为eos基于dpos一种pos的变种,有stake(eos token)才能去使用资源,这笔钱会从创建者账户里扣除,这里也就是inita
- 查询test账户信息
$ ./eosc get account test
{
"account_name": "test",
"eos_balance": "0.0000 EOS",
"staked_balance": "0.0001 EOS",
"unstaking_balance": "0.0000 EOS",
"last_unstaking_time": "2106-02-07T06:28:15",
"permissions": [{
"perm_name": "active",
"parent": "owner",
"required_auth": {
"threshold": 1,
"keys": [{
"key": "EOS5HUmMgJRoxiuPdeiGpbCJvQ7pGkSAEKV45d1WVbkkN8vFHWjYJ",
"weight": 1
}
],
"accounts": []
}
},{
"perm_name": "owner",
"parent": "",
"required_auth": {
"threshold": 1,
"keys": [{
"key": "EOS5U7dBVwkwiUvsBBYuhR2yhkWYXYCK5mi6JgZjE7jwvXyxbArd1",
"weight": 1
}
],
"accounts": []
}
}
]
}
可以看到 "staked_balance": "0.0001 EOS"，表明test账户里有0.0001个eos，不过这写token被锁定了
- 部署currency合约
$ ./eosc set contract test ../../contracts/currency/currency.wast ../../contracts/currency/currency.abi
test 这里表示合约发布的账户
执行命令后后你会看到返回一个带有transaction_id的json字符串,说明部署成功了