此文章基于官方 README.md 对 eos/contracts/dice 合约进行部署调用，及一些官方文档与最新代码有冲突的地方

合约说明

此合约实现了一个简单的骰子游戏，两位玩家各有 50% 几率获胜

1. 玩家 1 下注 1 EOS，并提交一个 SHA256 加密的密钥1
2. 王家 2 下注 1 EOS，并提交一个 SHA256 加密的密钥2

因为两玩家下注数量相同，所以匹配，游戏开始

3. 一位玩家公布密钥
4. 五分钟倒计时后，如果第二位玩家没有公布密钥，则第一位玩家直接获胜
5. 另一位玩家公布密钥，基于两个密钥决出获胜者，并支付赌注
6. 游戏结束后，胜者可以取回奖励

使用 Cleos 操作

预备

钱包导入两个密匙
5KQwrPbwdL6PhXujxW37FSSQZ1JiwsST4cqQzDeyXtP79zkvFD3 5Jmsawgsp1tQ3GD6JyGCwy1dcvqKZgX6ugMVMdjirx85iv5VyPR

设置 Bios 合约

cleos set contract eosio build/contracts/eosio.bios -p eosio

创建 eosio.token 账号

cleos create account eosio eosio.token EOS7ijWCBmoXBi3CgtK7DJxentZZeTkeUnaSDvyro9dq7Sd1C3dC4 EOS7ijWCBmoXBi3CgtK7DJxentZZeTkeUnaSDvyro9dq7Sd1C3dC4

给 eosio.token 设置 eosio.token 合约用于发币

cleos set contract eosio.token build/contracts/eosio.token -p eosio.token

创建 dice 账号

cleos create account eosio dice EOS7ijWCBmoXBi3CgtK7DJxentZZeTkeUnaSDvyro9dq7Sd1C3dC4 EOS7ijWCBmoXBi3CgtK7DJxentZZeTkeUnaSDvyro9dq7Sd1C3dC4

给 dice 设置 dice 合约

cleos set contract dice build/contracts/dice -p dice

创建 SYS 代币

此处官方文档为创建 EOS 代币，但是现在版本本地的默认代币改为 SYS，如创建 EOS 则之后代码会报错 only core token allowed

cleos push action eosio.token create '[ "eosio", "1000000000.0000 SYS", 0, 0, 0]' -p eosio.token

创建 alice 账号

cleos create account eosio alice EOS7ijWCBmoXBi3CgtK7DJxentZZeTkeUnaSDvyro9dq7Sd1C3dC4 EOS7ijWCBmoXBi3CgtK7DJxentZZeTkeUnaSDvyro9dq7Sd1C3dC4

创建 bob 账号

cleos create account eosio bob EOS7ijWCBmoXBi3CgtK7DJxentZZeTkeUnaSDvyro9dq7Sd1C3dC4 EOS7ijWCBmoXBi3CgtK7DJxentZZeTkeUnaSDvyro9dq7Sd1C3dC4

空投 1000 个 SYS 给 alice

cleos push action eosio.token issue '[ "alice", "1000.0000 SYS", "" ]' -p eosio

空投 1000 个 SYS 给 bob

cleos push action eosio.token issue '[ "bob", "1000.0000 EOS", "" ]' -p eosio

alice 给 dice 设置转账权限

此处官方文档为 "actor":"dice","permission":"active"，应为 "actor":"dice","permission":"eosio.code"，下面一样

cleos set account permission alice active '{"threshold": 1,"keys": [{"key": "EOS7ijWCBmoXBi3CgtK7DJxentZZeTkeUnaSDvyro9dq7Sd1C3dC4","weight": 1}],"accounts": [{"permission":{"actor":"dice","permission":"eosio.code"},"weight":1}]}' owner -p alice

bob 给 dice 设置转账权限

cleos set account permission bob active '{"threshold": 1,"keys": [{"key": "EOS7ijWCBmoXBi3CgtK7DJxentZZeTkeUnaSDvyro9dq7Sd1C3dC4","weight": 1}],"accounts": [{"permission":{"actor":"dice","permission":"eosio.code"},"weight":1}]}' owner -p bob

alice 存入 100 SYS 到合约

cleos push action dice deposit '[ "alice", "100.0000 SYS" ]' -p alice

bob 存入 100 SYS 到合约

cleos push action dice deposit '[ "bob", "100.0000 SYS" ]' -p bob

alice 生成一个密匙

openssl rand  -hex 32
28349b1d4bcdc9905e4ef9719019e55743c84efa0c5e9a0b077f0b54fcd84905

alice SHA256 加密密匙

echo -n '28349b1d4bcdc9905e4ef9719019e55743c84efa0c5e9a0b077f0b54fcd84905' | xxd -r -p | sha256sum -b | awk '{print $1}'
d533f24d6f28ddcef3f066474f7b8355383e485681ba8e793e037f5cf36e4883

alice 下注 3 SYS

cleos push action dice offerbet '[ "3.0000 SYS", "alice", "d533f24d6f28ddcef3f066474f7b8355383e485681ba8e793e037f5cf36e4883" ]' -p alice

bob 生成一个密匙

openssl rand  -hex 32
15fe76d25e124b08feb835f12e00a879bd15666a33786e64b655891fba7d6c12

bob SHA256 加密密匙

echo -n '15fe76d25e124b08feb835f12e00a879bd15666a33786e64b655891fba7d6c12' | xxd -r -p | sha256sum -b | awk '{print $1}'
50ed53fcdaf27f88d51ea4e835b1055efe779bb87e6cfdff47d28c88ffb27129

bob 下注 3 SYS，随后游戏开始

cleos push action dice offerbet '[ "3.0000 SYS", "bob", "50ed53fcdaf27f88d51ea4e835b1055efe779bb87e6cfdff47d28c88ffb27129" ]' -p bob

游戏开始后，查看 Dice 合约的表数据

cleos get table dice dice account
{
  "rows": [{
      "owner": "alice",
      "eos_balance": "97.0000 SYS",
      "open_offers": 0,
      "open_games": 1
    },{
      "owner": "bob",
      "eos_balance": "97.0000 SYS",
      "open_offers": 0,
      "open_games": 1
    }
  ],
  "more": false
}

cleos get table dice dice game
{
  "rows": [{
      "id": 1,
      "bet": "3.0000 SYS",
      "deadline": "1970-01-01T00:00:00",
      "player1": {
        "commitment": "d533f24d6f28ddcef3f066474f7b8355383e485681ba8e793e037f5cf36e4883",
        "reveal": "0000000000000000000000000000000000000000000000000000000000000000"
      },
      "player2": {
        "commitment": "50ed53fcdaf27f88d51ea4e835b1055efe779bb87e6cfdff47d28c88ffb27129",
        "reveal": "0000000000000000000000000000000000000000000000000000000000000000"
      }
    }
  ],
  "more": false
}

bob 公布密匙

cleos push action dice reveal '[ "50ed53fcdaf27f88d51ea4e835b1055efe779bb87e6cfdff47d28c88ffb27129", "15fe76d25e124b08feb835f12e00a879bd15666a33786e64b655891fba7d6c12" ]' -p bob

现在的表数据，game 表有个截止时间（5分钟后）

cleos get table dice dice game
{
  "rows": [{
      "id": 1,
      "bet": "3.0000 SYS",
      "deadline": "2018-04-17T07:45:49",
      "player1": {
        "commitment": "d533f24d6f28ddcef3f066474f7b8355383e485681ba8e793e037f5cf36e4883",
        "reveal": "0000000000000000000000000000000000000000000000000000000000000000"
      },
      "player2": {
        "commitment": "50ed53fcdaf27f88d51ea4e835b1055efe779bb87e6cfdff47d28c88ffb27129",
        "reveal": "15fe76d25e124b08feb835f12e00a879bd15666a33786e64b655891fba7d6c12"
      }
    }
  ],
  "more": false
}

alice 公布密匙，决出胜者，游戏结束，game 表中移除数据

cleos push action dice reveal '[ "d533f24d6f28ddcef3f066474f7b8355383e485681ba8e793e037f5cf36e4883", "28349b1d4bcdc9905e4ef9719019e55743c84efa0c5e9a0b077f0b54fcd84905" ]' -p alice

游戏结束后，查看 account 表数据，账户余额

cleos get table dice dice account
{
  "rows": [{
      "owner": "alice",
      "eos_balance": "103.0000 SYS",
      "open_offers": 0,
      "open_games": 0
    },{
      "owner": "bob",
      "eos_balance": "97.0000 SYS",
      "open_offers": 0,
      "open_games": 0
    }
  ],
  "more": false
}

alice 取出金额

此处需先 dice 合约对 eosio.token 授权，才能进行转账

cleos set account permission dice active '{"threshold": 1,"keys": [{"key": "EOS7ijWCBmoXBi3CgtK7DJxentZZeTkeUnaSDvyro9dq7Sd1C3dC4","weight": 1}],"accounts": [{"permission":{"actor":"dice","permission":"eosio.code"},"weight":1}]}' owner -p dice

cleos push action dice withdraw '[ "alice", "103.0000 SYS" ]' -p alice

查看 alice 账户余额

cleos get currency balance eosio.token alice sys
1003.0000 SYS