holochain_client 0.6.0-dev.7

A Rust client for the Holochain Conductor API
Documentation 
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use std::sync::Arc;

use anyhow::Result;
use async_trait::async_trait;
use holo_hash::AgentPubKey;
use holochain_conductor_api::ZomeCall;
use holochain_zome_types::{
    capability::CapSecret, cell::CellId, dependencies::holochain_integrity_types::Signature,
    zome_io::ZomeCallUnsigned,
};

pub(crate) mod client_signing;

#[cfg(feature = "lair_signing")]
pub(crate) mod lair_signing;

#[async_trait]
pub trait AgentSigner {
    /// Sign the given data with the public key found in the agent id of the provenance.
    async fn sign(
        &self,
        cell_id: &CellId,
        provenance: AgentPubKey,
        data_to_sign: Arc<[u8]>,
    ) -> Result<Signature>;

    fn get_provenance(&self, cell_id: &CellId) -> Option<AgentPubKey>;

    /// Get the capability secret for the given `cell_id` if it exists.
    fn get_cap_secret(&self, cell_id: &CellId) -> Option<CapSecret>;
}

/// Signs an unsigned zome call using the provided signing implementation
pub(crate) async fn sign_zome_call(
    zome_call_unsigned: ZomeCallUnsigned,
    signer: Arc<dyn AgentSigner + Send + Sync>,
) -> Result<ZomeCall> {
    let pub_key = zome_call_unsigned.provenance.clone();

    let data_to_sign = zome_call_unsigned.data_to_sign().map_err(|e| {
        anyhow::anyhow!("Failed to get data to sign from unsigned zome call: {}", e)
    })?;

    let signature = signer
        .sign(&zome_call_unsigned.cell_id, pub_key, data_to_sign)
        .await?;

    Ok(ZomeCall {
        cell_id: zome_call_unsigned.cell_id,
        zome_name: zome_call_unsigned.zome_name,
        fn_name: zome_call_unsigned.fn_name,
        payload: zome_call_unsigned.payload,
        cap_secret: zome_call_unsigned.cap_secret,
        provenance: zome_call_unsigned.provenance,
        nonce: zome_call_unsigned.nonce,
        expires_at: zome_call_unsigned.expires_at,
        signature,
    })
}