> For the complete Linea documentation index, see [llms.txt](/llms.txt). > Agents can fetch this page as Markdown at [https://docs.linea.build/api/linea-smart-contracts/interfaces/l1/izkevmv2.md](https://docs.linea.build/api/linea-smart-contracts/interfaces/l1/izkevmv2.md). # IZkEvmV2 # `IZkEvmV2` ### StartingRootHashDoesNotMatch ```solidity error StartingRootHashDoesNotMatch() ``` _Thrown when the starting rootHash does not match the existing state._ ### ProofIsEmpty ```solidity error ProofIsEmpty() ``` _Thrown when zk proof is empty bytes._ ### InvalidProofType ```solidity error InvalidProofType() ``` _Thrown when zk proof type is invalid._ ### InvalidProof ```solidity error InvalidProof() ``` _Thrown when zk proof is invalid._ ### InvalidProofOrProofVerificationRanOutOfGas ```solidity error InvalidProofOrProofVerificationRanOutOfGas(string errorReason) ``` _Thrown when the call to the verifier runs out of gas or reverts internally._ Contributions not accepted These reference pages are automatically generated based on Linea's [smart contracts](https://github.com/Consensys/linea-monorepo/tree/main/contracts/src). To ensure they accurately match the deployed smart contracts, we cannot accept any contributions that edit these pages.