INNER CODE UNIT · Rust

is_initial

risc0/risc0-ethereum · crates/aggregation/src/lib.rs:96

    pub fn is_initial(&self) -> bool {
        self.mmr.is_empty()
    }

    /// Encodes the [GuestState] for committing to the journal. Uses a specialized codec.
    /// See [MerkleMountainRange::encode].
    pub fn encode(&self) -> Vec<u8> {
        [self.self_image_id.as_bytes(), &self.mmr.encode()].concat()
    }

    /// Decodes the [GuestState] for the journal. Uses a specialized codec.
    /// See [MerkleMountainRange::encode].
    pub fn decode(bytes: impl AsRef<[u8]>) -> Result<Self, DecodingError> {
        // Read the first 32 bytes as the self_image_id.
        let (chunk, bytes) = bytes
            .as_ref()
            .split_at_checked(U256::BYTES)
            .ok_or(DecodingError::UnexpectedEnd)?;

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