> For the complete documentation index, see [llms.txt](https://docs.fringe.fi/smart-contract-documentation/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.fringe.fi/smart-contract-documentation/openzeppelin/contracts/interfaces/ierc1363.md). # IERC 1363 ## Methods ### allowance ```solidity function allowance(address owner, address spender) external view returns (uint256) ``` *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 ```solidity function approve(address spender, uint256 amount) external nonpayable returns (bool) ``` *Sets `amount` as the allowance of `spender` over the caller's tokens. Returns a boolean value indicating whether the operation succeeded. IMPORTANT: 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: Emits an {Approval} event.* #### Parameters | Name | Type | Description | | ------- | ------- | ----------- | | spender | address | undefined | | amount | uint256 | undefined | #### Returns | Name | Type | Description | | ---- | ---- | ----------- | | \_0 | bool | undefined | ### approveAndCall ```solidity function approveAndCall(address spender, uint256 value) external nonpayable returns (bool) ``` *Approve the passed address to spend the specified amount of tokens on behalf of msg.sender and then call `onApprovalReceived` on spender.* #### Parameters | Name | Type | Description | | ------- | ------- | ---------------------------------------------- | | spender | address | address The address which will spend the funds | | value | uint256 | uint256 The amount of tokens to be spent | #### Returns | Name | Type | Description | | ---- | ---- | ----------- | | \_0 | bool | undefined | ### approveAndCall ```solidity function approveAndCall(address spender, uint256 value, bytes data) external nonpayable returns (bool) ``` *Approve the passed address to spend the specified amount of tokens on behalf of msg.sender and then call `onApprovalReceived` on spender.* #### Parameters | Name | Type | Description | | ------- | ------- | ------------------------------------------------------------------------- | | spender | address | address The address which will spend the funds | | value | uint256 | uint256 The amount of tokens to be spent | | data | bytes | bytes Additional data with no specified format, sent in call to `spender` | #### Returns | Name | Type | Description | | ---- | ---- | ----------- | | \_0 | bool | undefined | ### balanceOf ```solidity function balanceOf(address account) external view returns (uint256) ``` *Returns the amount of tokens owned by `account`.* #### Parameters | Name | Type | Description | | ------- | ------- | ----------- | | account | address | undefined | #### Returns | Name | Type | Description | | ---- | ------- | ----------- | | \_0 | uint256 | undefined | ### supportsInterface ```solidity function supportsInterface(bytes4 interfaceId) external view returns (bool) ``` *Returns true if this contract implements the interface defined by `interfaceId`. See the corresponding section] to learn more about how these ids are created. This function call must use less than 30 000 gas.* #### Parameters | Name | Type | Description | | ----------- | ------ | ----------- | | interfaceId | bytes4 | undefined | #### Returns | Name | Type | Description | | ---- | ---- | ----------- | | \_0 | bool | undefined | ### totalSupply ```solidity function totalSupply() external view returns (uint256) ``` *Returns the amount of tokens in existence.* #### Returns | Name | Type | Description | | ---- | ------- | ----------- | | \_0 | uint256 | undefined | ### transfer ```solidity function transfer(address recipient, uint256 amount) external nonpayable returns (bool) ``` *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 | ### transferAndCall ```solidity function transferAndCall(address to, uint256 value) external nonpayable returns (bool) ``` *Transfer tokens from `msg.sender` to another address and then call `onTransferReceived` on receiver* #### Parameters | Name | Type | Description | | ----- | ------- | ------------------------------------------------- | | to | address | address The address which you want to transfer to | | value | uint256 | uint256 The amount of tokens to be transferred | #### Returns | Name | Type | Description | | ---- | ---- | -------------------- | | \_0 | bool | true unless throwing | ### transferAndCall ```solidity function transferAndCall(address to, uint256 value, bytes data) external nonpayable returns (bool) ``` *Transfer tokens from `msg.sender` to another address and then call `onTransferReceived` on receiver* #### Parameters | Name | Type | Description | | ----- | ------- | -------------------------------------------------------------------- | | to | address | address The address which you want to transfer to | | value | uint256 | uint256 The amount of tokens to be transferred | | data | bytes | bytes Additional data with no specified format, sent in call to `to` | #### Returns | Name | Type | Description | | ---- | ---- | -------------------- | | \_0 | bool | true unless throwing | ### transferFrom ```solidity function transferFrom(address sender, address recipient, uint256 amount) external nonpayable returns (bool) ``` *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 | ### transferFromAndCall ```solidity function transferFromAndCall(address from, address to, uint256 value, bytes data) external nonpayable returns (bool) ``` *Transfer tokens from one address to another and then call `onTransferReceived` on receiver* #### Parameters | Name | Type | Description | | ----- | ------- | -------------------------------------------------------------------- | | from | address | address The address which you want to send tokens from | | to | address | address The address which you want to transfer to | | value | uint256 | uint256 The amount of tokens to be transferred | | data | bytes | bytes Additional data with no specified format, sent in call to `to` | #### Returns | Name | Type | Description | | ---- | ---- | -------------------- | | \_0 | bool | true unless throwing | ### transferFromAndCall ```solidity function transferFromAndCall(address from, address to, uint256 value) external nonpayable returns (bool) ``` *Transfer tokens from one address to another and then call `onTransferReceived` on receiver* #### Parameters | Name | Type | Description | | ----- | ------- | ------------------------------------------------------ | | from | address | address The address which you want to send tokens from | | to | address | address The address which you want to transfer to | | value | uint256 | uint256 The amount of tokens to be transferred | #### Returns | Name | Type | Description | | ---- | ---- | -------------------- | | \_0 | bool | true unless throwing | ## 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 |