> Aztec.nr API reference, v6.0.0 (mainnet and testnet). Index: https://docs.aztec.network/aztec-nr-api/v6.0.0/llms.txt

# Function l1_to_l2_msg_exists

Module: `noir_aztec::oracle::avm`

```rust
pub unconstrained fn l1_to_l2_msg_exists(msg_hash: Field, msg_leaf_index: u64) -> bool
```