SafeERC20

library SafeERC20

Source: contracts/common/SafeERC20.sol

Index

• safeApprove

• safeTransfer

• safeTransferFrom

• staticAllowance

• staticBalanceOf

• staticTotalSupply

Reference

Functions

safeApprove

function`` safeApprove(ERC20 _token, address _spender, uint256 _amount) internal returns (bool)

---

Same as a standards-compliant ERC20.approve() that never reverts (returns false). Note that this makes an external call to the token.

Parameters:

• _token - ERC20

• _spender - address

• _amount - uint256

Returns:

• bool

safeTransfer

function`` safeTransfer(ERC20 _token, address _to, uint256 _amount) internal returns (bool)

---

Same as a standards-compliant ERC20.transfer() that never reverts (returns false). Note that this makes an external call to the token.

Parameters:

• _token - ERC20

• _to - address

• _amount - uint256

Returns:

• bool

safeTransferFrom

function`` safeTransferFrom(ERC20 _token, address _from, address _to, uint256 _amount) internal returns (bool)

---

Same as a standards-compliant ERC20.transferFrom() that never reverts (returns false). Note that this makes an external call to the token.

Parameters:

• _token - ERC20

• _from - address

• _to - address

• _amount - uint256

Returns:

• bool

staticAllowance

function`` staticAllowance(ERC20 _token, address _owner, address _spender) internal view returns (uint256)

---

Static call into ERC20.allowance(). Reverts if the call fails for some reason (should never fail).

Parameters:

• _token - ERC20

• _owner - address

• _spender - address

Returns:

• uint256

staticBalanceOf

function`` staticBalanceOf(ERC20 _token, address _owner) internal view returns (uint256)

---

Static call into ERC20.balanceOf(). Reverts if the call fails for some reason (should never fail).

Parameters:

• _token - ERC20

• _owner - address

Returns:

• uint256

staticTotalSupply

function`` staticTotalSupply(ERC20 _token) internal view returns (uint256)

---

Static call into ERC20.totalSupply(). Reverts if the call fails for some reason (should never fail).

Parameters:

• _token - ERC20

Returns:

• uint256