36 lines
978 B
Solidity
36 lines
978 B
Solidity
// SPDX-License-Identifier: MIT
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// Tells the Solidity compiler to compile only from v0.8.13 to v0.9.0
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pragma solidity ^0.8.13;
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import "./ConvertLib.sol";
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// This is just a simple example of a coin-like contract.
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// It is not ERC20 compatible and cannot be expected to talk to other
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// coin/token contracts.
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contract MetaCoin {
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mapping (address => uint) balances;
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event Transfer(address indexed _from, address indexed _to, uint256 _value);
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constructor() {
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balances[tx.origin] = 10000;
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}
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function sendCoin(address receiver, uint amount) public returns(bool sufficient) {
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if (balances[msg.sender] < amount) return false;
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balances[msg.sender] -= amount;
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balances[receiver] += amount;
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emit Transfer(msg.sender, receiver, amount);
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return true;
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}
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function getBalanceInEth(address addr) public view returns(uint){
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return ConvertLib.convert(getBalance(addr),2);
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}
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function getBalance(address addr) public view returns(uint) {
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return balances[addr];
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}
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}
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