diff options
author | Brandon Millman <brandon.millman@gmail.com> | 2018-02-06 05:16:46 +0800 |
---|---|---|
committer | Brandon Millman <brandon.millman@gmail.com> | 2018-02-06 05:16:46 +0800 |
commit | 99b1f81e89e3ac929c7829552ea7ae19998524e9 (patch) | |
tree | 534161a9fa8bcf8bb5572d7ef0aa311fe9b9d116 /packages/contracts/src/current/tokens/ERC20Token/ERC20Token.sol | |
parent | 6577d607332e2fb1a442d663e260ecb969457c36 (diff) | |
parent | 46ad7b1b38df0f302821258629ffa749e7dd00b9 (diff) | |
download | dexon-sol-tools-99b1f81e89e3ac929c7829552ea7ae19998524e9.tar dexon-sol-tools-99b1f81e89e3ac929c7829552ea7ae19998524e9.tar.gz dexon-sol-tools-99b1f81e89e3ac929c7829552ea7ae19998524e9.tar.bz2 dexon-sol-tools-99b1f81e89e3ac929c7829552ea7ae19998524e9.tar.lz dexon-sol-tools-99b1f81e89e3ac929c7829552ea7ae19998524e9.tar.xz dexon-sol-tools-99b1f81e89e3ac929c7829552ea7ae19998524e9.tar.zst dexon-sol-tools-99b1f81e89e3ac929c7829552ea7ae19998524e9.zip |
Merge branch 'development' into feature/testnet-faucets/order-dispenser
* development: (37 commits)
Add dates to CHANGELOGs
Change CHANGELOGs
Add .editorconfig
Fix a typo
Temp
Use forEach instead of map
Add PR number
Fix an exception when a signature collision happens
Fix prettier
Add regression tests
Improve the comment and fix an exception
Add missing comas
Lerna-ignore tslint and tsconfig
Update contract versions, fix tests
Rename directories
Rename previous contracts, fix imports, add nested file structure
Move all contracts into a single directory
Update import
Fix import
Get rid of suffixed contract versioning and replace it with a poor-mans package manager. Versions are stored locally, and are generated in a copy-on-write basis as required
...
Diffstat (limited to 'packages/contracts/src/current/tokens/ERC20Token/ERC20Token.sol')
-rw-r--r-- | packages/contracts/src/current/tokens/ERC20Token/ERC20Token.sol | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/packages/contracts/src/current/tokens/ERC20Token/ERC20Token.sol b/packages/contracts/src/current/tokens/ERC20Token/ERC20Token.sol new file mode 100644 index 000000000..0e5b87aa4 --- /dev/null +++ b/packages/contracts/src/current/tokens/ERC20Token/ERC20Token.sol @@ -0,0 +1,58 @@ +pragma solidity ^0.4.18; + +import { Token } from "../Token/Token.sol"; + +contract ERC20Token is Token { + + function transfer(address _to, uint _value) + public + returns (bool) + { + require(balances[msg.sender] >= _value && balances[_to] + _value >= balances[_to]); + balances[msg.sender] -= _value; + balances[_to] += _value; + Transfer(msg.sender, _to, _value); + return true; + } + + function transferFrom(address _from, address _to, uint _value) + public + returns (bool) + { + require(balances[_from] >= _value && allowed[_from][msg.sender] >= _value && balances[_to] + _value >= balances[_to]); + balances[_to] += _value; + balances[_from] -= _value; + allowed[_from][msg.sender] -= _value; + Transfer(_from, _to, _value); + return true; + } + + function approve(address _spender, uint _value) + public + returns (bool) + { + allowed[msg.sender][_spender] = _value; + Approval(msg.sender, _spender, _value); + return true; + } + + function balanceOf(address _owner) + public + view + returns (uint) + { + return balances[_owner]; + } + + function allowance(address _owner, address _spender) + public + view + returns (uint) + { + return allowed[_owner][_spender]; + } + + mapping (address => uint) balances; + mapping (address => mapping (address => uint)) allowed; + uint public totalSupply; +} |