智能合约DAPP质押模式系统开发

　　去中心化的APP（Dapp）18I合约259l开发3365系统+没有中心服务器，运行在去中心化、分布式节点上的APP。

　　Dapp=前端（web、app）+后端（智能合约）

　　以太坊社区把基于智能合约的应用称为去中心化的应用程序（Decentralized App，简称DApp)。

　　DApp的目标是（或者应该是）让智能合约有一个友好的界面，外加一些额外的东西，例如IPFS(可以存储和读取数据的去中心化网络，不是出自以太坊团队，但有类似的精神）。

　　DApp可以在一台与以太坊节点交互的中心化服务器上运行，也可以在任意一个以太坊平等节点上运行。

　　提示:与一般的网站不同，DApp不能在普通的服务器上运行。它需要提交交易到区块链并且从区块链而不是中心化数据库读取重要数据。

　　相对于典型的用户登录系统，用户有可能被表示成一个“钱包”地址而其他用户数据保存在本地。许多事情都会与目前的Web应用有着不同的架构。

python调用开源智能合约:
from time import time
from eth_typing import abi
from web3 import Web3
import time
SETTING = {   "ROPSTEN_URL": "XXX",
  "MAINNET_URL": "https://rpc.***/bsc",
  "CONTRACT_ADDRESS": "0x35ebb629b6e65Cb7705B5E0695982D206898f195",#ZiggyManagerMultiRewards
  "WALLET_PRIVATEKEY": "",#钱包私钥
  "WALLET_ADDRESS": "", #钱包公钥
  "ETH_SPAN": [1800, 2100, 2400, 2700, 3000, 3300, 3600, 3900]
}

abi = '''
[{"inputs":[{"internalType":"address","name":"_stakeToken","type":"address"},{"internalType":"address","name":"_prizePool","type":"address"},{"internalType":"address","name":"_prizePoolControlledToken","type":"address"},{"internalType":"uint256","name":"_stakingRewardsDuration","type":"uint256"},{"internalType":"address","name":"_potsConverter","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"GateManagerDeposit","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"rewardToken","type":"address"},{"indexed":false,"internalType":"uint256","name":"reward","type":"uint256"}],"name":"RewardAdded","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":true,"internalType":"address","name":"rewardToken","type":"address"},{"indexed":false,"internalType":"uint256","name":"reward","type":"uint256"}],"name":"RewardPaid","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Staked","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"user","type":"address"},{"indexed":false,"internalType":"uint256","name":"amount","type":"uint256"}],"name":"Withdrawn","type":"event"},{"inputs":[],"name":"TVL","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_rewardToken","type":"address"},{"internalType":"uint256","name":"_stakingRewardsDuration","type":"uint256"}],"name":"addRewardToken","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"awardBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balances","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"compound","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"referrer","type":"address"}],"name":"depositAll","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"},{"internalType":"address","name":"referrer","type":"address"}],"name":"depositMoonPot","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"}],"name":"earned","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"account","type":"address"},{"internalType":"uint256","name":"id","type":"uint256"}],"name":"earned","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"exitInstantly","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"exitTimelock","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"}],"name":"getReward","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"getReward","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"_token","type":"address"}],"name":"inCaseTokensGetStuck","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"}],"name":"lastTimeRewardApplicable","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint256","name":"reward","type":"uint256"}],"name":"notifyRewardAmount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"reward","type":"uint256"}],"name":"notifyStakeTokenRewardAmount","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"potsConverter","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"prizePool","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"prizePoolControlledToken","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"rewardInfo","outputs":[{"internalType":"address","name":"rewardToken","type":"address"},{"internalType":"uint256","name":"stakingRewardsDuration","type":"uint256"},{"internalType":"uint256","name":"periodFinish","type":"uint256"},{"internalType":"uint256","name":"rewardRate","type":"uint256"},{"internalType":"uint256","name":"lastUpdateTime","type":"uint256"},{"internalType":"uint256","name":"rewardPerTokenStored","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"}],"name":"rewardPerToken","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardTokenLength","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"rewards","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newConverter","type":"address"}],"name":"setPotsConverter","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"id","type":"uint256"},{"internalType":"uint256","name":"rewardDuration","type":"uint256"}],"name":"setRewardDuration","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"stakeToken","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"userRewardPerTokenPaid","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"user","type":"address"}],"name":"userTotalBalance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"withdrawAllInstantly","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"withdrawAllTimelock","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdrawInstantlyFromMoonPotPrizePool","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdrawMoonPotYield","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdrawWithTimeLockFromMoonPotPrizePool","outputs":[],"stateMutability":"nonpayable","type":"function"}]
'''
#合约的abi，要对应更改
w3 = Web3(Web3.HTTPProvider(SETTING["MAINNET_URL"]))

myContract = w3.et***ntract(address=SETTING["CONTRACT_ADDRESS"],abi=abi)

print(myContract.caller.balances(SETTING["WALLET_ADDRESS"]))
print(myCon***ctions.balances(SETTING["WALLET_ADDRESS"]).call())

def Compound():


  nonce = w3.eth.getTransactionCount(SETTING["WALLET_ADDRESS"])

  txn_dict = myCon***c***pound().buildTransaction({
    'chainId': 56,
    'gas': 770101,
    'gasPrice': w3.eth.gas_price,
    'nonce': nonce,
  })
#compound() 就是对应合约所有的接口功能。
  signed_txn = w3.eth.account.signTransaction(txn_dict, private_key=SETTING["WALLET_PRIVATEKEY"])

  result = w3.eth.sendRawTransaction(signed_txn.rawTransaction)

  #tx_receipt = w3.eth.getTransactionReceipt(result)

  print(result)

Compound()

DApp流程如下：
1)用Solidity(或其他语言）编写智能合约（后缀为.sol)。

2)用sole编译器将.sol合约编译成EVM字节码。

3)编译好的字节码回送给DApp前端。

4)前端将编译好的智能合约部署到区块链中。

5)区块链返回智能合约地址+ABI(合约接口的二进制表示。合约接口用JS0N表示，包括变量、事件和可以调用的方法）。

6)前端通过Address+ABI+nonce，调用智能合约。

7)智能合约开始处理。

智能合约技术的产生对互联网变革非常重要，但是不能直接用于支撑DApp应用生态环境。

侧链、VM也撑不起应用生态，因为我们知道应用运行于0S之上，而不是直接运行在裸机之上。

一定程度上讲，VM、侧链可以类比图灵等价的裸机。