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Transaction Hash
Block
From
To
Approve149440522024-05-25 22:50:51656 days ago1716677451IN
Wellchain: WLCN Token
0 ETH0.00000140.02981537
Approve149370362024-05-25 18:56:59656 days ago1716663419IN
Wellchain: WLCN Token
0 ETH0.00000280.09423563
Transfer148262142024-05-23 5:22:55658 days ago1716441775IN
Wellchain: WLCN Token
0 ETH0.00000240.05058981
Approve148149892024-05-22 23:08:45659 days ago1716419325IN
Wellchain: WLCN Token
0 ETH0.000002850.06058932
Approve148145972024-05-22 22:55:41659 days ago1716418541IN
Wellchain: WLCN Token
0 ETH0.000002490.05289912
Transfer148142902024-05-22 22:45:27659 days ago1716417927IN
Wellchain: WLCN Token
0 ETH0.00000280.05900195
Transfer148120242024-05-22 21:29:55659 days ago1716413395IN
Wellchain: WLCN Token
0 ETH0.000002640.08656778
Approve147616792024-05-21 17:31:45660 days ago1716312705IN
Wellchain: WLCN Token
0 ETH0.000004310.09110458
Transfer147614702024-05-21 17:24:47660 days ago1716312287IN
Wellchain: WLCN Token
0 ETH0.000005250.09952753
Approve147606772024-05-21 16:58:21660 days ago1716310701IN
Wellchain: WLCN Token
0 ETH0.000004020.13304726
Transfer147552052024-05-21 13:55:57660 days ago1716299757IN
Wellchain: WLCN Token
0 ETH0.000010790.20646392
Approve147544002024-05-21 13:29:07660 days ago1716298147IN
Wellchain: WLCN Token
0 ETH0.000004150.08784659
Transfer147541892024-05-21 13:22:05660 days ago1716297725IN
Wellchain: WLCN Token
0 ETH0.000004480.08510782
Transfer147517042024-05-21 11:59:15660 days ago1716292755IN
Wellchain: WLCN Token
0 ETH0.000002950.08315666
Transfer147279472024-05-20 22:47:21661 days ago1716245241IN
Wellchain: WLCN Token
0 ETH0.000003310.06230451
Approve147233612024-05-20 20:14:29661 days ago1716236069IN
Wellchain: WLCN Token
0 ETH0.000005020.1035269

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Contract Source Code Verified (Exact Match)

Contract Name:
Wellchain

Compiler Version
v0.8.24+commit.e11b9ed9

Optimization Enabled:
No with 200 runs

Other Settings:
default evmVersion, MIT license

Contract Source Code (Solidity)

/**
 *Submitted for verification at basescan.org on 2024-05-20
*/

/**
 * @title Wellchain Token
 * @dev ERC20 token contract for Wellchain (WLCN)
 */

pragma solidity ^0.8.24;

// SPDX-License-Identifier: MIT

contract Wellchain {
    // Token details
    string public constant name = "Wellchain";
    string public constant symbol = "WLCN";
    uint256 public constant decimals = 18; // 1 WLCN token represents 1 unit with 18 decimals
    uint256 public totalSupply = 1_000_000_000 * (10**decimals); // Total supply of 1 billion Wellchain tokens

    // Balances and allowances
    mapping(address => uint256) public balanceOf;
    mapping(address => mapping(address => uint256)) public allowance;

    // Transfer and approval events
    event Transfer(address indexed from, address indexed to, uint256 value);
    event Approval(address indexed owner, address indexed spender, uint256 value);

    // Contract owner (consider making it immutable for extra security)
    address public owner;

    // Constructor (sets initial supply and owner)
    constructor() {
        owner = msg.sender; // Set deployer as initial owner
        balanceOf[msg.sender] = totalSupply; // Allocate total supply to contract deployer
    }

    // Transfer tokens from sender to recipient
    function transfer(address recipient, uint256 amount) public returns (bool) {
        _transfer(msg.sender, recipient, amount);
        return true;
    }

    // Transfer tokens from a specified address (requires allowance)
    function transferFrom(address sender, address recipient, uint256 amount) public returns (bool) {
        uint256 currentAllowance = allowance[sender][msg.sender];
        require(currentAllowance >= amount, "Insufficient allowance");

        _transfer(sender, recipient, amount);
        unchecked {
            allowance[sender][msg.sender] -= amount;
        }
        return true;
    }

    // Internal transfer function
    function _transfer(address from, address to, uint256 amount) internal {
        require(balanceOf[from] >= amount, "Insufficient balance");
        unchecked {
            balanceOf[from] -= amount;
            balanceOf[to] += amount;
        }
        emit Transfer(from, to, amount);
    }

    // Approve an address to spend tokens on your behalf
    function approve(address spender, uint256 amount) public returns (bool) {
        allowance[msg.sender][spender] = amount;
        emit Approval(msg.sender, spender, amount);
        return true;
    }

    // Transfer ownership of the contract (consider adding checks/restrictions)
    function transferOwnership(address newOwner) public onlyOwner {
        require(newOwner != address(0), "New owner cannot be zero address");
        owner = newOwner;
    }

    // Modifier to restrict functions to the contract owner
    modifier onlyOwner() {
        require(msg.sender == owner, "Only owner can call this function");
        _;
    }
}

Contract Security Audit

Contract ABI

API
[{"inputs":[],"stateMutability":"nonpayable","type":"constructor"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"owner","type":"address"},{"indexed":true,"internalType":"address","name":"spender","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"from","type":"address"},{"indexed":true,"internalType":"address","name":"to","type":"address"},{"indexed":false,"internalType":"uint256","name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"allowance","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"spender","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"approve","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"","type":"address"}],"name":"balanceOf","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"decimals","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"name","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"symbol","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"totalSupply","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transfer","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"sender","type":"address"},{"internalType":"address","name":"recipient","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"transferFrom","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"}]

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Swarm Source

ipfs://639be7d7bd47ae3f30417f1f89c43f9980339e7dbbd01a39141e8e8aababb7dd

Block Transaction Difficulty Gas Used Reward
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Block Uncle Number Difficulty Gas Used Reward
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OVERVIEW

Wellchain is lowering the cost of healthcare using the blockchain.

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Validator Index Block Amount
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Transaction Hash Block Value Eth2 PubKey Valid
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.