A simple Solidity smart contract that logs user interactions with blockchain timestamps and the user’s address.
# 🧾 Interaction Logger Smart Contract
A simple Solidity smart contract that logs user interactions with blockchain timestamps and the user’s address.
It’s lightweight, easy to deploy, and perfect for learning how data logging works on Ethereum.
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## 📍 Deployed Contract
Network: Remix Local VM / Testnet / Ethereum
Contract Address: 0xACe5E51066800099cEdD494F993E5A9472c26E61
> You can use this address to verify or interact with the deployed contract if it’s on a live testnet.
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## 📜 Overview
The InteractionLogger contract allows users to store interactions permanently on-chain.
Each interaction includes:
- The user’s wallet address
- A custom message
- The timestamp when the interaction occurred
This is great for activity logs, event tracking, or transparency records on blockchain.
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## ⚙️ Features
✅ Log interactions with your Ethereum address
✅ Store timestamps directly on-chain block.timestamp)
✅ Retrieve the total number of interactions logged
✅ Fetch specific interactions by index
✅ No imports, no constructor, and easy to deploy
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## 🧠 Smart Contract Code
File: InteractionLogger.sol
```solidity
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.20;
contract InteractionLogger {
struct Interaction {
address user;
string message;
uint timestamp;
}
Interaction[] public interactions;
// Log an interaction
function logInteraction(string memory message) public {
interactions.push(Interaction({
user: msg.sender,
message: message,
timestamp: block.timestamp
}));
}
// Get total number of interactions
function getInteractionCount() public view returns (uint) {
return interactions.length;
}
// Get a specific interaction by index
function getInteraction(uint index) public view returns (address, string memory, uint) {
require(index < interactions.length, "Invalid index");
Interaction memory i = interactions[index];
return (i.user, i.message, i.timestamp);
}
}