ERC20

Standard ERC20 token

test/contracts/ERC20.sol

Implementation of the basic standard token. https://eips.ethereum.org/EIPS/eip-20 Originally based on code by FirstBlood: https://github.com/Firstbloodio/token/blob/master/smart_contract/FirstBloodToken.sol * This implementation emits additional Approval events, allowing applications to reconstruct the allowance status for all accounts just by listening to said events. Note that this isn't required by the specification, and other compliant implementations may not do it.

Generated in Tue Feb 25 2020 06:48:07 GMT+0000 (Coordinated Universal Time)

Variables

_balances

_allowed

_totalSupply

constructor

	Type	Name	Natspec

totalSupply

public view

Total number of tokens in existence

	Type	Name	Natspec
output	uint256

balanceOf

public view

Gets the balance of the specified address.

	Type	Name	Natspec
input	address	owner	The address to query the balance of.
output	uint256		A uint256 representing the amount owned by the passed address.

allowance

public view

Function to check the amount of tokens that an owner allowed to a spender.

	Type	Name	Natspec
input	address	owner	The address which owns the funds.
input	address	spender	The address which will spend the funds.
output	uint256		A uint256 specifying the amount of tokens still available for the spender.

transfer

public

Transfer token to a specified address

	Type	Name	Natspec
input	address	to	The address to transfer to.
input	uint256	value	The amount to be transferred.
output	bool

approve

public

Approve the passed address to spend the specified amount of tokens on behalf of msg.sender. 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

	Type	Name	Natspec
input	address	spender	The address which will spend the funds.
input	uint256	value	The amount of tokens to be spent.
output	bool

transferFrom

public

Transfer tokens from one address to another. Note that while this function emits an Approval event, this is not required as per the specification, and other compliant implementations may not emit the event.

	Type	Name	Natspec
input	address	from	The address which you want to send tokens from
input	address	to	The address which you want to transfer to
input	uint256	value	The amount of tokens to be transferred
output	bool

increaseAllowance

public

Increase the amount of tokens that an owner allowed to a spender. approve should be called when _allowed[msg.sender][spender] == 0. To increment allowed value is better to use this function to avoid 2 calls (and wait until the first transaction is mined) From MonolithDAO Token.sol Emits an Approval event.

	Type	Name	Natspec
input	address	spender	The address which will spend the funds.
input	uint256	addedValue	The amount of tokens to increase the allowance by.
output	bool

decreaseAllowance

public

Decrease the amount of tokens that an owner allowed to a spender. approve should be called when _allowed[msg.sender][spender] == 0. To decrement allowed value is better to use this function to avoid 2 calls (and wait until the first transaction is mined) From MonolithDAO Token.sol Emits an Approval event.

	Type	Name	Natspec
input	address	spender	The address which will spend the funds.
input	uint256	subtractedValue	The amount of tokens to decrease the allowance by.
output	bool

_transfer

internal

Transfer token for a specified addresses

	Type	Name	Natspec
input	address	from	The address to transfer from.
input	address	to	The address to transfer to.
input	uint256	value	The amount to be transferred.

_mint

internal

Internal function that mints an amount of the token and assigns it to an account. This encapsulates the modification of balances such that the proper events are emitted.

	Type	Name	Natspec
input	address	account	The account that will receive the created tokens.
input	uint256	value	The amount that will be created.

_burn

internal

Internal function that burns an amount of the token of a given account.

	Type	Name	Natspec
input	address	account	The account whose tokens will be burnt.
input	uint256	value	The amount that will be burnt.

_approve

internal

Approve an address to spend another addresses' tokens.

	Type	Name	Natspec
input	address	owner	The address that owns the tokens.
input	address	spender	The address that will spend the tokens.
input	uint256	value	The number of tokens that can be spent.

_burnFrom

internal

Internal function that burns an amount of the token of a given account, deducting from the sender's allowance for said account. Uses the internal burn function. Emits an Approval event (reflecting the reduced allowance).

	Type	Name	Natspec
input	address	account	The account whose tokens will be burnt.
input	uint256	value	The amount that will be burnt.