Wrapped CRO is a direct fork of WETH10 and was adjusted to be used as a ERC20-wrapper for Crypto.com Coin on the Cronos blockchain.

The supply of WCRO is capped at type(uint112).max.

Any operation that ends with this contract holding Wrapped CRO is prohibited.

deposit CRO in this contract to receive Wrapped CRO (WCRO), which implements the ERC20 standard. WCRO is interchangeable with CRO in a 1:1 basis.

withdraw CRO from this contract by unwrapping WCRO from your wallet.

The depositTo and withdrawTo convenience functions allow to place the resulting WCRO or CRO in an address other than the caller.

The withdrawFrom function allows to unwrap CRO from an owner wallet to a recipient wallet, as long as the owner called approve

When an approval is set to type(uint256).max it will not decrease through transferFrom or withdrawFrom calls.

WCRO implements EIP2612 to set approvals through off-chain signatures

The depositAndCall and transferAndCall functions allow to deposit Ether or transfer WCRO, executing a call in a user-defined contract immediately afterwards, but within the same transaction.

This function will call onTokenTransfer on the recipient address, receiving and passing along a bytes parameter which can be used by the calling contract to process the callback. See EIP667.

This contract implements EIP3156 that allows to flashLoan an arbitrary amount of Wrapped CRO, unbacked by real CRO, with the condition that it is burned before the end of the transaction. No fees are charged.

This function will call onFlashLoan on the calling address, receiving and passing along a bytes parameter which can be used by the calling contract to process the callback.

For a minimal gas cost, all functions in WCRO are external, and a great deal of code repetition exists. To help in understanding the code, blocks that are used recurrently are preceded by a commented-out function call such as // _transferFrom(msg.sender, to, value) that describes the functionality of the block, and followed by a blank line.