DApp（去中心化应用）质押挖矿系统是基于区块链技术构建的一种去中心化应用，它结合了质押和挖矿的概念，让用户可以通过质押代币来参与挖矿活动并获得相应的奖励。

以下是一个简单的DApp质押挖矿系统的源码demo：

import web3

初始化web3

web3.setProvider(web3.providers.HttpProvider("http://localhost:8545"))

获取合约地址和abi

contract_address = "0xADDRESS"
contract_abi = "ABI"

初始化合约对象

contract = web3.eth.contract(abi=contract_abi, address=contract_address)

定义合约方法名和参数列表

methods = ["mine", "stake", "unstake", "get_balance"]
params = []

定义合约方法的默认值和参数类型

default_values = {"mine": {"blockNumber": 10}, "stake": {"amount": 1000}, "unstake": {"amount": 1000}}
types = {"mine": {"blockNumber": "uint256"}, "stake": {"amount": "uint256"}, "unstake": {"amount": "uint256"}}

获取合约方法列表

methods_list = contract.methods.filter(lambda m: m.name in methods)

遍历合约方法列表，获取每个方法的签名和参数类型

for method in methods_list:
params.append(types.get(method.name, {}))
if default_values.get(method.name, None) is None:
signature = method.signature()
else:
signature = method.signature() + "(" + ", ".join([f"{k} {v}" for k, v in default_values[method.name].items()]) + ")"
print(f"{method.name} - {signature}")