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

# Module get_nullifier_membership_witness

Module: `noir_aztec::oracle::get_nullifier_membership_witness`

## Functions

- [get_low_nullifier_membership_witness](/aztec-nr-api/v6.0.0/noir_aztec/oracle/get_nullifier_membership_witness/fn.get_low_nullifier_membership_witness.md): Returns a leaf preimage and membership witness for the low nullifier of `nullifier` in the nullifier tree whose root is defined in `block_header`.
- [get_nullifier_membership_witness](/aztec-nr-api/v6.0.0/noir_aztec/oracle/get_nullifier_membership_witness/fn.get_nullifier_membership_witness.md): Returns a leaf preimage and membership witness for `nullifier` in the nullifier tree whose root is defined in `block_header`.