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

# Struct RetractableFactOrigin

Module: `noir_aztec::facts`

```rust
pub struct RetractableFactOrigin {
    pub block_number: u32,
    pub block_hash: Field,
    pub block_state: OriginBlockState,
}
```

A retractable fact's origin block.

## Fields

```rust
block_number: u32
```

```rust
block_hash: Field
```

```rust
block_state: OriginBlockState
```

## Trait implementations

```rust
impl Deserialize for RetractableFactOrigin
```

```rust
pub fn deserialize(fields: [Field; 3]) -> Self
```

```rust
pub fn stream_deserialize<let K: u32>(reader: &mut Reader<K>) -> Self
```

```rust
impl Eq for RetractableFactOrigin
```

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

```rust
impl Serialize for RetractableFactOrigin
```

```rust
pub fn serialize(self) -> [Field; 3]
```

```rust
pub fn stream_serialize<let K: u32>(self, writer: &mut Writer<K>)
```