ERC20Detailed.sol

Details

Optional functions from the ERC20 standard.

Methods

allowance(address,address)

Solidity

function allowance(address owner, address spender) external view returns (uint256)

Details

Returns the remaining number of tokens that spender will be allowed to spend on behalf of owner through transferFrom. This is zero by default. * This value changes when approve or transferFrom are called.

Parameters

Name	Type	Description
owner	address	undefined
spender	address	undefined

Returns

Name	Type	Description
_0	uint256	undefined

approve(address,uint256)

Solidity

function approve(address spender, uint256 amount) external nonpayable returns (bool)

Details

Sets amount as the allowance of spender over the caller's tokens. Returns a boolean value indicating whether the operation succeeded. > Beware that changing an allowance with this method brings the risk that someone may use both the old and the new allowance by unfortunate transaction ordering. One possible solution to mitigate this race condition is to first reduce the spender's allowance to 0 and set the desired value afterwards: https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729 * Emits an Approval event.

Parameters

Name	Type	Description
spender	address	undefined
amount	uint256	undefined

Returns

Name	Type	Description
_0	bool	undefined

balanceOf(address)

Solidity

function balanceOf(address account) external view returns (uint256)

Details

Returns the amount of tokens owned by account.

Parameters

Name	Type	Description
account	address	undefined

Returns

Name	Type	Description
_0	uint256	undefined

decimals()

Solidity

function decimals() external view returns (uint8)

Details

Returns the number of decimals used to get its user representation. For example, if decimals equals 2, a balance of 505 tokens should be displayed to a user as 5,05 (505 / 10 ** 2). Tokens usually opt for a value of 18, imitating the relationship between Ether and Wei. > Note that this information is only used for display purposes: it in no way affects any of the arithmetic of the contract, including IERC20.balanceOf and IERC20.transfer.

Returns

Name	Type	Description
_0	uint8	undefined

name()

Solidity

function name() external view returns (string)

Details

Returns the name of the token.

Returns

Name	Type	Description
_0	string	undefined

symbol()

Solidity

function symbol() external view returns (string)

Details

Returns the symbol of the token, usually a shorter version of the name.

Returns

Name	Type	Description
_0	string	undefined

totalSupply()

Solidity

function totalSupply() external view returns (uint256)

Details

Returns the amount of tokens in existence.

Returns

Name	Type	Description
_0	uint256	undefined

transfer(address,uint256)

Solidity

function transfer(address recipient, uint256 amount) external nonpayable returns (bool)

Details

Moves amount tokens from the caller's account to recipient. Returns a boolean value indicating whether the operation succeeded. Emits a Transfer event.

Parameters

Name	Type	Description
recipient	address	undefined
amount	uint256	undefined

Returns

Name	Type	Description
_0	bool	undefined

transferFrom(address,address,uint256)

Solidity

function transferFrom(address sender, address recipient, uint256 amount) external nonpayable returns (bool)

Details

Moves amount tokens from sender to recipient using the allowance mechanism. amount is then deducted from the caller's allowance. Returns a boolean value indicating whether the operation succeeded. Emits a Transfer event.

Parameters

Name	Type	Description
sender	address	undefined
recipient	address	undefined
amount	uint256	undefined

Returns

Name	Type	Description
_0	bool	undefined

Events

Approval

Solidity

event Approval(address indexed owner, address indexed spender, uint256 value)

Parameters

Name	Type	Description
owner indexed	address	undefined
spender indexed	address	undefined
value	uint256	undefined

Transfer

Solidity

event Transfer(address indexed from, address indexed to, uint256 value)

Parameters

Name	Type	Description
from indexed	address	undefined
to indexed	address	undefined
value	uint256	undefined