All selectors

Uniswap Universal Router

0x1231ae40: ETHNotAccepted

error ETHNotAccepted()

What it means

A transaction that reverts with the raw data 0x1231ae40 hit the custom error ETHNotAccepted, defined in Uniswap Universal Router. The explorer shows the hex because it does not have the contract's ABI to translate it.

Native ETH was sent to the router in a context where it does not accept it.

How to fix it

Rebuild the transaction from the dapp. If you crafted it manually, do not attach value for token-to-token routes.

Want the exact answer for your transaction?

Paste the hash and we decode the revert against the contract itself, including the values inside the error, free.

Decode my transaction

Every selector on this page was computed as the first 4 bytes of keccak256 of the signature shown. A selector identifies a signature exactly; on rare occasions two different signatures share one, so the transaction decoder is always the more precise answer.