ExpandedIERC20

burn(uint256 value) external

Burns a specific amount of the caller’s tokens.

Only burns the caller’s tokens, so it is safe to leave this method permissionless.

mint(address to, uint256 value) → bool external

Mints tokens and adds them to the balance of the to address.

This method should be permissioned to only allow designated parties to mint tokens.

totalSupply() → uint256 external

Returns the amount of tokens in existence.

balanceOf(address account) → uint256 external

Returns the amount of tokens owned by account.

transfer(address recipient, uint256 amount) → bool external

Moves amount tokens from the caller’s account to recipient.

Returns a boolean value indicating whether the operation succeeded.

Emits a Transfer event.

allowance(address owner, address spender) → uint256 external

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.

approve(address spender, uint256 amount) → bool external

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.

transferFrom(address sender, address recipient, uint256 amount) → bool external

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.

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

Emitted when value tokens are moved from one account (from) to another (to).

Note that value may be zero.

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

Emitted when the allowance of a spender for an owner is set by a call to approve. value is the new allowance.

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