ERC20BurnableUpgradeable
Extension of {ERC20} that allows token holders to destroy both their own tokens and those that they have an allowance for, in a way that can be recognized off-chain (via event analysis).
Methods
allowance
See {IERC20-allowance}.
Parameters
Returns
approve
See {IERC20-approve}. Requirements: - spender
cannot be the zero address.
Parameters
Returns
balanceOf
See {IERC20-balanceOf}.
Parameters
Returns
burn
Destroys amount
tokens from the caller. See {ERC20-_burn}.
Parameters
burnFrom
Destroys amount
tokens from account
, deducting from the caller's allowance. See {ERC20-_burn} and {ERC20-allowance}. Requirements: - the caller must have allowance for accounts
's tokens of at least amount
.
Parameters
decimals
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. This is the value {ERC20} uses, unless {_setupDecimals} is called. NOTE: 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
decreaseAllowance
Atomically decreases the allowance granted to spender
by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - spender
cannot be the zero address. - spender
must have allowance for the caller of at least subtractedValue
.
Parameters
Returns
increaseAllowance
Atomically increases the allowance granted to spender
by the caller. This is an alternative to {approve} that can be used as a mitigation for problems described in {IERC20-approve}. Emits an {Approval} event indicating the updated allowance. Requirements: - spender
cannot be the zero address.
Parameters
Returns
name
Returns the name of the token.
Returns
symbol
Returns the symbol of the token, usually a shorter version of the name.
Returns
totalSupply
See {IERC20-totalSupply}.
Returns
transfer
See {IERC20-transfer}. Requirements: - recipient
cannot be the zero address. - the caller must have a balance of at least amount
.
Parameters
Returns
transferFrom
See {IERC20-transferFrom}. Emits an {Approval} event indicating the updated allowance. This is not required by the EIP. See the note at the beginning of {ERC20}. Requirements: - sender
and recipient
cannot be the zero address. - sender
must have a balance of at least amount
. - the caller must have allowance for sender
's tokens of at least amount
.
Parameters
Returns
Events
Approval
Parameters
Transfer
Parameters
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