39 lines
1.6 KiB
Solidity
39 lines
1.6 KiB
Solidity
// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.19;
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contract MockLinkToken {
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string public name = "Chainlink Token";
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string public symbol = "LINK";
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uint8 public decimals = 18;
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mapping(address => uint256) public balanceOf;
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mapping(address => mapping(address => uint256)) public allowance;
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uint256 public totalSupply;
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event Transfer(address indexed from, address indexed to, uint256 value);
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event Approval(address indexed owner, address indexed spender, uint256 value);
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function mint(address to, uint256 amount) external {
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balanceOf[to] += amount;
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totalSupply += amount;
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emit Transfer(address(0), to, amount);
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}
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function transfer(address to, uint256 amount) external returns (bool) {
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require(balanceOf[msg.sender] >= amount, "insufficient balance");
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balanceOf[msg.sender] -= amount;
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balanceOf[to] += amount;
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emit Transfer(msg.sender, to, amount);
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return true;
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}
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function transferFrom(address from, address to, uint256 amount) external returns (bool) {
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require(balanceOf[from] >= amount, "insufficient balance");
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require(allowance[from][msg.sender] >= amount, "insufficient allowance");
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balanceOf[from] -= amount;
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balanceOf[to] += amount;
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allowance[from][msg.sender] -= amount;
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emit Transfer(from, to, amount);
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return true;
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}
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function approve(address spender, uint256 amount) external returns (bool) {
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allowance[msg.sender][spender] = amount;
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emit Approval(msg.sender, spender, amount);
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return true;
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}
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}
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