View Source: contracts/Dependencies/IERC20.sol
↘ Derived Contracts: ERC20, IWrbtc, IZUSDToken
IERC20
Interface of the ERC20 standard as defined in the EIP.
Events
event Transfer(address indexed from, address indexed to, uint256 value);
event Approval(address indexed owner, address indexed spender, uint256 value);
- totalSupply()
- balanceOf(address account)
- transfer(address recipient, uint256 amount)
- allowance(address owner, address spender)
- increaseAllowance(address spender, uint256 addedValue)
- decreaseAllowance(address spender, uint256 subtractedValue)
- approve(address spender, uint256 amount)
- transferFrom(address sender, address recipient, uint256 amount)
- name()
- symbol()
- decimals()
Returns the amount of tokens in existence.
function totalSupply() external view
returns(uint256)
Source Code
function totalSupply() external view returns (uint256);
Returns the amount of tokens owned by account
.
function balanceOf(address account) external view
returns(uint256)
Arguments
Name | Type | Description |
---|---|---|
account | address |
Source Code
function balanceOf(address account) external view returns (uint256);
Moves amount
tokens from the caller's account to recipient
.
Returns a boolean value indicating whether the operation succeeded.
Emits a {Transfer} event.
function transfer(address recipient, uint256 amount) external nonpayable
returns(bool)
Arguments
Name | Type | Description |
---|---|---|
recipient | address | |
amount | uint256 |
Source Code
function transfer(address recipient, uint256 amount) external returns (bool);
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.
function allowance(address owner, address spender) external view
returns(uint256)
Arguments
Name | Type | Description |
---|---|---|
owner | address | |
spender | address |
Source Code
function allowance(address owner, address spender) external view returns (uint256);
function increaseAllowance(address spender, uint256 addedValue) external nonpayable
returns(bool)
Arguments
Name | Type | Description |
---|---|---|
spender | address | |
addedValue | uint256 |
Source Code
function increaseAllowance(address spender, uint256 addedValue) external returns (bool);
function decreaseAllowance(address spender, uint256 subtractedValue) external nonpayable
returns(bool)
Arguments
Name | Type | Description |
---|---|---|
spender | address | |
subtractedValue | uint256 |
Source Code
function decreaseAllowance(address spender, uint256 subtractedValue) external 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:
ethereum/EIPs#20 (comment)
Emits an {Approval} event.
function approve(address spender, uint256 amount) external nonpayable
returns(bool)
Arguments
Name | Type | Description |
---|---|---|
spender | address | |
amount | uint256 |
Source Code
function approve(address spender, uint256 amount) external 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.
function transferFrom(address sender, address recipient, uint256 amount) external nonpayable
returns(bool)
Arguments
Name | Type | Description |
---|---|---|
sender | address | |
recipient | address | |
amount | uint256 |
Source Code
function transferFrom(address sender, address recipient, uint256 amount) external returns (bool);
function name() external view
returns(string)
Source Code
function name() external view returns (string memory);
function symbol() external view
returns(string)
Source Code
function symbol() external view returns (string memory);
function decimals() external view
returns(uint8)
Source Code
function decimals() external view returns (uint8);
- ActivePool
- ActivePoolStorage
- BaseMath
- BorrowerOperations
- BorrowerOperationsScript
- BorrowerOperationsStorage
- BorrowerWrappersScript
- CheckContract
- CollSurplusPool
- CollSurplusPoolStorage
- console
- Context
- DefaultPool
- DefaultPoolStorage
- DocsCover
- DSAuth
- DSAuthEvents
- DSAuthority
- DSNote
- DSProxy
- DSProxyCache
- DSProxyFactory
- ERC20
- ETHTransferScript
- FeeDistributor
- FeeDistributorStorage
- GasPool
- HintHelpers
- HintHelpersStorage
- IActivePool
- IBalanceRedirectPresale
- IBorrowerOperations
- ICollSurplusPool
- IDefaultPool
- IERC20
- IERC2612
- IExternalPriceFeed
- IFeeDistributor
- IFeeSharingProxy
- ILiquityBase
- ILiquityBaseParams
- IMasset
- IMoCBaseOracle
- Initializable
- IPool
- IPriceFeed
- IRSKOracle
- ISortedTroves
- IStabilityPool
- ITroveManager
- IWrbtc
- IZUSDToken
- LiquityBase
- LiquityBaseParams
- LiquityMath
- LiquitySafeMath128
- MoCMedianizer
- MultiTroveGetter
- MultiTroveGetterStorage
- NueToken
- Ownable
- PriceFeed
- PriceFeedStorage
- ProxiableContract
- ProxiableContract2
- Proxy
- RskOracle
- SafeMath
- SortedTroves
- SortedTrovesStorage
- StabilityPool
- StabilityPoolScript
- StabilityPoolStorage
- Storage
- Storage2
- TokenScript
- TroveManager
- TroveManagerBase
- TroveManagerBase1MinuteBootstrap
- TroveManagerRedeemOps
- TroveManagerScript
- TroveManagerStorage
- UpgradableProxy
- ZUSDToken
- ZUSDTokenStorage