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authorLeonid Logvinov <logvinov.leon@gmail.com>2018-03-28 17:05:36 +0800
committerLeonid Logvinov <logvinov.leon@gmail.com>2018-04-02 17:34:29 +0800
commit4d9029bb0e3b215efdf165704c80d3bacef0e85a (patch)
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parentbc49dde4d5d24b9a8b01459bde061f9b23fb5898 (diff)
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Add metacoin example project
Diffstat (limited to 'packages/metacoin/contracts/Metacoin.sol')
-rw-r--r--packages/metacoin/contracts/Metacoin.sol25
1 files changed, 25 insertions, 0 deletions
diff --git a/packages/metacoin/contracts/Metacoin.sol b/packages/metacoin/contracts/Metacoin.sol
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index 000000000..6b6814b21
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+++ b/packages/metacoin/contracts/Metacoin.sol
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+pragma solidity ^0.4.21;
+pragma experimental ABIEncoderV2;
+
+contract Metacoin {
+ mapping (address => uint) public balances;
+
+ event Transfer(address indexed _from, address indexed _to, uint256 _value);
+
+ struct TransferData {
+ address to;
+ uint256 amount;
+ }
+
+ function Metacoin() public {
+ balances[msg.sender] = 10000;
+ }
+
+ function transfer(TransferData transferData) public returns (bool success) {
+ if (balances[msg.sender] < transferData.amount) return false;
+ balances[msg.sender] -= transferData.amount;
+ balances[transferData.to] += transferData.amount;
+ Transfer(msg.sender, transferData.to, transferData.amount);
+ return true;
+ }
+}