53 lines
2.1 KiB
Solidity
53 lines
2.1 KiB
Solidity
pragma solidity ^0.4.23;
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// Abstract contract for the full ERC 20 Token standard
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// https://github.com/ethereum/EIPs/issues/20
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interface ERC20Token {
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/**
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* @notice send `_value` token to `_to` from `msg.sender`
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* @param _to The address of the recipient
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* @param _value The amount of token to be transferred
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* @return Whether the transfer was successful or not
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*/
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function transfer(address _to, uint256 _value) external returns (bool success);
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/**
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* @notice `msg.sender` approves `_spender` to spend `_value` tokens
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* @param _spender The address of the account able to transfer the tokens
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* @param _value The amount of tokens to be approved for transfer
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* @return Whether the approval was successful or not
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*/
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function approve(address _spender, uint256 _value) external returns (bool success);
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/**
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* @notice send `_value` token to `_to` from `_from` on the condition it is approved by `_from`
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* @param _from The address of the sender
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* @param _to The address of the recipient
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* @param _value The amount of token to be transferred
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* @return Whether the transfer was successful or not
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*/
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function transferFrom(address _from, address _to, uint256 _value) external returns (bool success);
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/**
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* @param _owner The address from which the balance will be retrieved
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* @return The balance
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*/
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function balanceOf(address _owner) external view returns (uint256 balance);
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/**
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* @param _owner The address of the account owning tokens
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* @param _spender The address of the account able to transfer the tokens
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* @return Amount of remaining tokens allowed to spent
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*/
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function allowance(address _owner, address _spender) external view returns (uint256 remaining);
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/**
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* @notice return total supply of tokens
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*/
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function totalSupply() external view returns (uint256 supply);
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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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} |