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

# Struct PrivateTxConstantData

Module: `noir_aztec::protocol::abis::private_tx_constant_data`

```rust
pub struct PrivateTxConstantData {
    pub anchor_block_header: BlockHeader,
    pub tx_context: TxContext,
    pub protocol_nullifier: Field,
    pub vk_tree_root: Field,
    pub protocol_contracts: ProtocolContracts,
}
```

Constants used throughout the executions of private functions.

## Fields

```rust
anchor_block_header: BlockHeader
```

```rust
tx_context: TxContext
```

```rust
protocol_nullifier: Field
```

```rust
vk_tree_root: Field
```

```rust
protocol_contracts: ProtocolContracts
```

## Implementations

```rust
impl PrivateTxConstantData
```

```rust
pub fn to_tx_constant_data(self) -> TxConstantData
```

## Trait implementations

```rust
impl Empty for PrivateTxConstantData
```

```rust
pub fn empty() -> Self
```

```rust
pub fn is_empty(self: Self) -> bool
where
    Self: Eq
```

```rust
pub fn assert_empty<let S: u32>(self: Self, msg: str<S>)
where
    Self: Eq
```

```rust
impl Eq for PrivateTxConstantData
```

```rust
pub fn eq(_self: Self, _other: Self) -> bool
```