要求:
1. 能在各种恶劣网络环境下,正常工作;
2. 每30分钟定时领取一次
![0.jpg](https://cdn.steemitimages.com/DQmSLANaocCRwtucagvYzYrcu65Y6xLzzShZZavuE6adfw8/0.jpg)
由于[Steem](https://steem.io) 官方的 API 节点 https://api.steemit.com 因种种原因而无法访问,其他第三方的API 节点,也出各种状况.所以稳健的机器人,要在这些API 节点动态寻找可用API 节点.

示范程序(auto_claim_bot.py):
-----------------------------
```python
import steembase
import steem
from pick import pick
from steem.steemd import Steemd
from steem.account import Account
from steem.amount import Amount
from steem.instance import set_shared_steemd_instance
from steem.blockchain import Blockchain

steemd_nodes = [
    'https://anyx.io',
    'https://steemd.minnowsupportproject.org',
    'https://rpc.esteem.app',
    'https://api.steemit.com',
    'https://api.steem.house',
    'https://gtg.steem.house:8090',
    'https://appbasetest.timcliff.com',
]

set_shared_steemd_instance(Steemd(nodes=steemd_nodes))

# username = input('Enter username: ')
username = 'dappcoder'
# post_key = input('Enter private POST key: ')
post_key = '5JzkkkkkK3ZN'

# connect node
client = steem.Steem(nodes=steemd_nodes, keys=[post_key])

# get account reward balances
userinfo = client.get_account(username)
print('userinfo:', userinfo)

if(userinfo is None):
    print('Oops. Looks like user ' + username +
          ' doesn\'t exist on this chain!')
    exit()

reward_steem = userinfo['reward_steem_balance']
reward_sbd = userinfo['reward_sbd_balance']
reward_sp = userinfo['reward_vesting_steem']
reward_vests = userinfo['reward_vesting_balance']

print('Reward Balances:' + '\n' +
      'STEEM: ' + reward_steem + '\n' +
      'SBD: ' + reward_sbd + '\n' +
      'STEEM POWER: ' + reward_sp + '\n' +
      'VESTS: ' + reward_vests
      )

if Amount(reward_steem).amount + Amount(reward_sbd).amount + Amount(reward_vests).amount == 0:
    print('\n' + 'No rewards to claim')
    exit()
else:
    client.claim_reward_balance(
        reward_steem, reward_sbd, reward_vests, username)
    print(
        '\n' + 'All reward balances have been claimed. New reward balances are:' + '\n')

userinfo = client.get_account(username)

reward_steem = userinfo['reward_steem_balance']
reward_sbd = userinfo['reward_sbd_balance']
reward_sp = userinfo['reward_vesting_steem']
reward_vests = userinfo['reward_vesting_balance']

print('STEEM: ' + reward_steem + '\n' +
      'SBD: ' + reward_sbd + '\n' +
      'STEEM POWER: ' + reward_sp + '\n' +
      'VESTS: ' + reward_vests
      )
```
执行程序:`python auto_claim_bot.py`
执行结果符合预期:
![屏幕快照 2020-02-02 下午12.51.53.png](https://cdn.steemitimages.com/DQmWV8xK6kXFEW6YXDMDeGiuETrZFYs2A31hmovWKj7wr1A/%E5%B1%8F%E5%B9%95%E5%BF%AB%E7%85%A7%202020-02-02%20%E4%B8%8B%E5%8D%8812.51.53.png)


MacOS 上自动定时执行:`$ crontab -e`
```crontab
*/30 * * * * /usr/bin/python /path/auto_claim_bot.py >> /tmp/auto_claim_bot.log
```