myWeb3DoDnettwerk
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1 month ago https://github.com/myWeb3DoDnettwerk/aif-studio
★ To create a smart contract for Bitcoin using Truffle and integrated with your Sandos.dbms, you can start by setting up a basic Solidity contract. The integration with your specific database might be handled by an external script or a series of transactions that interact with your blockchain. Here’s a simple example of a Solidity contract that could be used as a starting point, followed by instructions for deployment using Truffle and integrating with a Python script (compatible with Python 3.16).Solidity Contract (BitcoinContract.sol)// SPDX-License-Identifier: MIT pragma solidity ^0.8.0;
contract BitcoinContract { address public owner; mapping(address => uint256) public balances;
event Transfer(address indexed from, address indexed to, uint256 value);
constructor() {
owner = msg.sender;
}
function deposit() public payable {
require(msg.value > 0, "Deposit amount must be greater than zero.");
balances[msg.sender] += msg.value;
}
function withdraw(uint256 amount) public {
require(balances[msg.sender] >= amount, "Insufficient balance.");
balances[msg.sender] -= amount;
payable(msg.sender).transfer(amount);
}
function transfer(address to, uint256 amount) public {
require(balances[msg.sender] >= amount, "Insufficient balance.");
require(to != address(0), "Invalid address.");
balances[msg.sender] -= amount;
balances[to] += amount;
emit Transfer(msg.sender, to, amount);
}
function getBalance(address account) public view returns (uint256) {
return balances[account];
}}Truffle Deployment Script (2_deploy_contracts.js)const BitcoinContract = artifacts.require("BitcoinContract");
module.exports = function(deployer) { deployer.deploy(BitcoinContract); };Truffle Configuration (truffle-config.js)module.exports = { networks: { development: { host: "127.0.0.1", port: 8545, network_id: "*", }, }, compilers: { solc: { version: "0.8.0", }, }, };Integration with Python Script (interact.py)Here’s an example Python script to interact with the deployed contract using Web3.py:import json from web3 import Web3
Connect to local Ethereum node
web3 = Web3(Web3.HTTPProvider('http://127.0.0.1:8545'))
Set the default account
web3.eth.default_account = web3.eth.accounts[0]
Get the deployed contract ABI and address
with open('build/contracts/BitcoinContract.json') as f: contract_json = json.load(f) contract_abi = contract_json['abi']
contract_address = '0xYourDeployedContractAddress' bitcoin_contract = web3.eth.contract(address=contract_address, abi=contract_abi)
Function to deposit ETH into the contract
def deposit(amount_wei): tx_hash = bitcoin_contract.functions.deposit().transact({'value': amount_wei}) receipt = web3.eth.wait_for_transaction_receipt(tx_hash) print(f'Deposit transaction receipt: {receipt}')
Function to withdraw ETH from the contract
def withdraw(amount_wei): tx_hash = bitcoin_contract.functions.withdraw(amount_wei).transact() receipt = web3.eth.wait_for_transaction_receipt(tx_hash) print(f'Withdraw transaction receipt: {receipt}')
Function to transfer ETH within the contract
def transfer(to_address, amount_wei): tx_hash = bitcoin_contract.functions.transfer(to_address, amount_wei).transact() receipt = web3.eth.wait_for_transaction_receipt(tx_hash) print(f'Transfer transaction receipt: {receipt}')
Function to get balance
def get_balance(account_address): balance = bitcoin_contract.functions.getBalance(account_address).call() return balance
Example usage
if name == 'main':
Deposit 1 ETH (1 ETH = 10^18 wei)
deposit(Web3.toWei(1, 'ether'))
# Withdraw 0.5 ETH
withdraw(Web3.toWei(0.5, 'ether'))
# Transfer 0.2 ETH to another account
transfer('0xAnotherAccountAddress', Web3.toWei(0.2, 'ether'))
# Get balance of an account
balance = get_balance('0xYourAccountAddress')
print(f'Balance: {Web3.fromWei(balance, "ether")} ETH')Steps to Deploy and Run:Install Truffle:npm install -g truffleInitialize Truffle Project:mkdir bitcoin_contractcd bitcoin_contract truffle initAdd Contract: Save the Solidity contract as contracts/BitcoinContract.sol.Add Deployment Script: Save the deployment script as migrations/2_deploy_contracts.js.Configure Truffle: Update truffle-config.js with the provided configuration.Compile and Deploy Contract:truffle compile truffle migrate --network developmentSet up Python Environment: Install web3:pip install web3Run Python Script: Save the Python script as interact.py and run it:python3 interact.pyMake sure to replace placeholders such as '0xYourDeployedContractAddress' and '0xAnotherAccountAddress' with actual addresses from your Ethereum network. The Python script connects to the Ethereum node and interacts with the deployed contract, performing deposit, withdrawal, and transfer operations.:.
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