ic-backup 0.58.0

Host-side snapshot backup and same-release recovery for Internet Computer canisters
Documentation 
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//! One fresh original source-bound metadata/data upload; no automatic receipt or retry.

mod allocation;
#[cfg(unix)]
mod data;
#[cfg(unix)]
pub use data::{
    IcSnapshotDataUploadExecutionError, IcSnapshotDataUploadReplyError, upload_snapshot_data,
};

pub use allocation::{
    IcSnapshotAllocationExecutionError, IcSnapshotAllocationSettlementError, allocate_snapshot,
};

use crate::{
    model::{
        ic_mutation::IcMutationAcknowledgement,
        ic_snapshot_upload::{
            IcSnapshotUploadAttempt, IcSnapshotUploadAttemptError, IcSnapshotUploadRequest,
            original_authority,
        },
        operation_plan::OperationPlanError,
    },
    ops::persistence::{
        AttemptJournalError, AttemptJournalGuard, ExecutionProgressPersistenceError,
        ExecutionStageGuard, ExecutionWorkflowPersistenceError,
    },
    policy::ic_snapshot_upload::{
        IcSnapshotUploadAcknowledgementView, IcSnapshotUploadAssociationError,
        validate_acknowledgement,
    },
    ports::{ic_mutation::IcMutationProviderError, ic_snapshot_upload::IcSnapshotUploadProvider},
};
use thiserror::Error;

// Complete compound uploads under their original guard using the admitted reply.
// Return before checkpointing, which must run after journal exclusion is released.
async fn upload_snapshot_with<E: std::error::Error + 'static, T>(
    stage: &ExecutionStageGuard<'_>,
    operation_sequence: u64,
    payload: &IcSnapshotUploadRequest<'_>,
    provider: &mut impl IcSnapshotUploadProvider,
    admit: impl AsyncFnOnce(&IcSnapshotUploadAttempt<'_, '_>) -> Result<(), E>,
    complete: impl AsyncFnOnce(
        &mut AttemptJournalGuard<'_>,
        &IcSnapshotUploadAttempt<'_, '_>,
        &IcSnapshotUploadAcknowledgementView<'_, '_>,
    ) -> T,
) -> Result<(IcMutationAcknowledgement, T), IcSnapshotUploadExecutionError<E>> {
    let plan = stage.plan();
    let authority = plan.attempt_authority(operation_sequence)?;
    let (acknowledgement, result) = super::ic_mutation::execute_reserved(
        stage,
        &authority,
        |journal| {
            original_authority(plan, operation_sequence, journal, payload)?;
            Ok::<_, IcSnapshotUploadExecutionError<E>>(())
        },
        |journal| {
            Ok(IcSnapshotUploadAttempt::new(
                plan,
                operation_sequence,
                journal,
                payload,
            )?)
        },
        async |request| {
            admit(request)
                .await
                .map_err(IcSnapshotUploadExecutionError::Admission)?;
            stage.layout()?;
            Ok(())
        },
        async |request, journal| Ok(provider.submit_upload(request, journal).await?),
        async |journal, request, acknowledgement| {
            let admitted = validate_acknowledgement(request, journal.record()?, acknowledgement)?;
            stage.layout()?;
            Ok::<_, IcSnapshotUploadReplyError>(complete(journal, request, &admitted).await)
        },
    )
    .await?;
    super::qualified_receipt::retain_reply(acknowledgement, result, |source, acknowledgement| {
        IcSnapshotUploadExecutionError::AfterReply {
            source,
            acknowledgement,
        }
    })
}

/// Upload-step failures retain original spending and any bounded returned acknowledgement.
#[derive(Debug, Error)]
pub enum IcSnapshotUploadExecutionError<E: std::error::Error + 'static> {
    /// Original operation authority cannot be derived.
    #[error(transparent)]
    Plan(#[from] OperationPlanError),
    /// Workflow, stage or original ancestor evidence failed admission.
    #[error(transparent)]
    Stage(#[from] ExecutionWorkflowPersistenceError),
    /// Original selected journal admission failed.
    #[error(transparent)]
    Journal(#[from] AttemptJournalError),
    /// Complete original progress, prerequisites or durable reservation failed.
    #[error(transparent)]
    Progress(#[from] ExecutionProgressPersistenceError),
    /// Canonical original mutation binding or current reservation differs.
    #[error(transparent)]
    Request(#[from] IcSnapshotUploadAttemptError),
    /// Fresh integration-owned admission rejected after reservation.
    #[error("fresh snapshot upload admission failed: {0}")]
    Admission(#[source] E),
    /// The single provider call failed; spending remains pending.
    #[error(transparent)]
    Provider(#[from] IcMutationProviderError),
    /// Admission after a reply failed, retaining its complete bounded evidence.
    #[error("snapshot upload reply rejected: {source}")]
    AfterReply {
        /// Typed original admission failure.
        source: IcSnapshotUploadReplyError,
        /// Complete returned passive evidence, without settlement authority.
        acknowledgement: Box<IcMutationAcknowledgement>,
    },
}

/// Admission failure after a returned snapshot upload reply.
#[derive(Debug, Error)]
pub enum IcSnapshotUploadReplyError {
    /// Original selected journal cannot be re-admitted.
    #[error(transparent)]
    Journal(#[from] AttemptJournalError),
    /// Passive exact reply association failed.
    #[error(transparent)]
    Association(#[from] IcSnapshotUploadAssociationError),
    /// Original stage or ancestor evidence cannot be re-admitted.
    #[error(transparent)]
    Stage(#[from] ExecutionWorkflowPersistenceError),
}

#[cfg(all(test, unix))]
mod tests;