ic_backup/policy/ic_snapshot_transfer_read/
mod.rs

1//! Pure current-reservation association using the original metadata/data decoder owners.
2
3use super::response_identity::{ResponseIdentity, ResponseIdentityMismatch};
4use crate::model::{
5    attempt_journal::AttemptJournalRecord,
6    ic_snapshot_data::{IcSnapshotDataError, IcSnapshotDataReply},
7    ic_snapshot_metadata::{IcSnapshotMetadataError, IcSnapshotMetadataReply},
8    ic_snapshot_transfer_read::{
9        IcSnapshotTransferReadError, IcSnapshotTransferReadPayload, IcSnapshotTransferReadRequest,
10        IcSnapshotTransferReadResponse,
11    },
12};
13use thiserror::Error;
14
15/// Existing bounded method-specific reply evidence; not authenticated transfer proof.
16#[derive(Debug)]
17pub enum IcSnapshotTransferReadReply<'request, 'metadata> {
18    /// Exact original metadata under its original raw-ID request.
19    Metadata(IcSnapshotMetadataReply<'request>),
20    /// Exact requested range length or known hash-checked chunk bytes.
21    Data(IcSnapshotDataReply<'request, 'metadata>),
22}
23
24/// Passive response together with its original method-specific decoded projection.
25#[derive(Debug)]
26pub struct IcSnapshotTransferReadView<'request, 'metadata> {
27    response: &'request IcSnapshotTransferReadResponse,
28    reply: IcSnapshotTransferReadReply<'request, 'metadata>,
29}
30
31impl<'request, 'metadata> IcSnapshotTransferReadView<'request, 'metadata> {
32    /// Read exact retained claims, raw bytes and opaque provider evidence.
33    #[must_use]
34    pub const fn response(&self) -> &'request IcSnapshotTransferReadResponse {
35        self.response
36    }
37    /// Read the original bounded decoder's projection without a new codec.
38    #[must_use]
39    pub const fn reply(&self) -> &IcSnapshotTransferReadReply<'request, 'metadata> {
40        &self.reply
41    }
42}
43
44/// Match original authority/reservation and actual claimed context/target, then decode.
45///
46/// This performs no IO or journal transition and grants no fresh read permission,
47/// authenticity, retry, aggregate coverage, durable bytes or terminal/release proof.
48/// Failures/lost replies stay pending. Integrations qualify actual authentication,
49/// freshness, snapshot custody and never-dispatched original-call custody.
50/// # Errors
51/// Rejects stale reservations, mismatched claims and existing bounded decoder errors.
52pub fn validate_response<'request, 'metadata>(
53    request: &IcSnapshotTransferReadRequest<'request, 'metadata>,
54    journal: &AttemptJournalRecord,
55    response: &'request IcSnapshotTransferReadResponse,
56) -> Result<IcSnapshotTransferReadView<'request, 'metadata>, IcSnapshotTransferReadAssociationError>
57{
58    request.validate_journal(journal)?;
59    let input = response.input();
60    ResponseIdentity::from(input).compare(&ResponseIdentity {
61        authority: &request.authority().digest(),
62        mutation_attempt: request.mutation_attempt(),
63        context: request.plan().context(),
64        target: request.payload().target(),
65    })?;
66    let reply = match request.payload() {
67        IcSnapshotTransferReadPayload::Metadata(payload) => IcSnapshotTransferReadReply::Metadata(
68            IcSnapshotMetadataReply::decode(payload, &input.reply)?,
69        ),
70        IcSnapshotTransferReadPayload::Data(payload) => {
71            IcSnapshotTransferReadReply::Data(IcSnapshotDataReply::decode(payload, &input.reply)?)
72        }
73    };
74    Ok(IcSnapshotTransferReadView { response, reply })
75}
76
77/// Passive association denial; no outcome or allowance refund follows.
78#[derive(Debug, Error)]
79pub enum IcSnapshotTransferReadAssociationError {
80    /// Current original journal no longer matches the read request.
81    #[error(transparent)]
82    Reservation(#[from] IcSnapshotTransferReadError),
83    /// Passive claims differ from the exact original update identity.
84    #[error(transparent)]
85    Identity(#[from] ResponseIdentityMismatch),
86    /// Original metadata decoder rejects shape or its tighter 1 MiB bound.
87    #[error(transparent)]
88    Metadata(#[from] IcSnapshotMetadataError),
89    /// Original data decoder rejects shape, bound, range length or chunk hash.
90    #[error(transparent)]
91    Data(#[from] IcSnapshotDataError),
92}
93
94#[cfg(test)]
95mod tests;
ic_backup/policy/ic_snapshot_transfer_read/mod.rs

ic_backup/policy/ic_snapshot_transfer_read/
mod.rs
