feat: CON-1700 Support flexible outcalls and pay-as-you-go pricing in pocket-ic

[eichhorl]

Replica Changes

The option to choose pay-as-you-go pricing for non- and fully-replicated outcalls is now gated behind the same feature flag that is already gating flexible outcalls (which use pay-as-you-go pricing by default).

Pocket-ic Changes

Added

• Add a function and the type to mock the responses of the committee nodes of a pending flexible canister HTTP outcall.
• Add the replication field on CanisterHttpRequest describing how a pending canister HTTP outcall is replicated across the nodes of its subnet: FullyReplicated, NonReplicated, or Flexible with the outcall's total_requests, min_responses, and max_responses.
• Add the pricing_version field on CanisterHttpRequest, reporting whether a pending canister HTTP outcall is priced with the Legacy or the PayAsYouGo pricing model.
• Enabling beta features (IcpConfig::beta_features passed to PocketIcBuilder::with_icp_config) now also enables the pay-as-you-go pricing model, which covers both the flexible_http_request management canister endpoint (whose outcalls are always priced that way) and the pricing_version field of http_request (through which a fully replicated or non-replicated outcall can select it).

Changed

• Mocked canister HTTP responses report the cycles their node actually spent on the outcall, instead of reporting no spend at all.
• Mocking a canister HTTP response whose reject message exceeds 1 KiB now fails. Such a response is not one any node could have reported.
• A node that cannot pay for gossiping its mocked reject reports an out-of-cycles reject instead of the mocked one, matching what a node of a real subnet does under pay-as-you-go pricing.

[Copilot]

Pull request overview

Adds flexible HTTP outcall mocking and pay-as-you-go pricing support across the replica, PocketIC server, client API, and tests.

Changes:

• Gates pay-as-you-go pricing with the flexible-outcalls feature flag.
• Adds flexible response mocking plus replication and pricing metadata.
• Accounts for mocked response costs and validates reject-message limits.

Reviewed changes

Copilot reviewed 25 out of 26 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
rs/types/types/src/canister_http.rs	Gates selectable pricing versions.
rs/types/management_canister_types/src/lib.rs	Re-exports pricing constants.
rs/types/management_canister_types/src/http.rs	Defines gated pricing versions.
rs/tests/networking/canister_http_correctness_test.rs	Updates context construction.
rs/state_machine_tests/src/lib.rs	Supports per-node response receipts.
rs/pocket_ic_server/src/state_api/state.rs	Adds mock-validation errors.
rs/pocket_ic_server/src/state_api/routes.rs	Adds the flexible-mocking route.
rs/pocket_ic_server/src/pocket_ic.rs	Implements metadata, pricing, and flexible mocking.
rs/pocket_ic_server/src/beta_features.rs	Enables flexible HTTP requests.
rs/pocket_ic_server/CHANGELOG.md	Documents server changes.
rs/pocket_ic_server/Cargo.toml	Adds the pricing dependency.
rs/pocket_ic_server/BUILD.bazel	Adds the Bazel pricing dependency.
rs/https_outcalls/client/src/client.rs	Enables pay-as-you-go request processing.
rs/execution_environment/src/execution_environment/tests.rs	Tests pricing feature gating.
rs/execution_environment/src/execution_environment.rs	Passes pricing-gate state into requests.
packages/pocket-ic/tests/tests.rs	Adds comprehensive integration coverage.
packages/pocket-ic/test_canister/src/canister.rs	Adds raw and flexible outcall methods.
packages/pocket-ic/test_canister/canister.did	Exposes the new test methods.
packages/pocket-ic/src/nonblocking.rs	Adds the asynchronous flexible-mocking API.
packages/pocket-ic/src/lib.rs	Adds the synchronous flexible-mocking API.
packages/pocket-ic/src/common/rest.rs	Defines new REST request and metadata types.
packages/pocket-ic/HOWTO.md	Documents flexible outcalls and pricing.
packages/pocket-ic/CHANGELOG.md	Records client-facing changes.
packages/pocket-ic/Cargo.toml	Adds the test serialization dependency.
packages/pocket-ic/BUILD.bazel	Adds corresponding test dependencies.
Cargo.lock	Locks the added dependencies.

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[zeropath-ai]

✅ No security or compliance issues detected. Reviewed everything up to 20cfcdf.

Security Overview

• 🔎 Scanned files: 26 changed file(s)
• 🔗 Scan Link: https://zeropath.com/app/repositories/f5e9d2bb-29a4-4b64-902a-391d65fd8b2d?scanId=b6452c73-50d3-485c-9f47-2a7d99288ea4&codeScanTypes=PrScan&tab=issues

Detected Code Changes

Change Type	Relevant files
Enhancement	► packages/pocket-ic/src/common/rest.rs     Add CanisterHttpReplication and CanisterHttpPricingVersion enums and integrate into RawCanisterHttpRequest/CanisterHttpRequest structures ► packages/pocket-ic/src/common/rest.rs     Add MockFlexibleCanisterHttpResponse struct and conversions to/from RawMockFlexibleCanisterHttpResponse
Enhancement	► packages/pocket-ic/src/lib.rs     Update imports and references to include MockFlexibleCanisterHttpResponse and new flexible outcall support notes
Enhancement	► packages/pocket-ic/src/nonblocking.rs     Add support and documentation for mock_flexible_canister_http_response in async context
Enhancement	► packages/pocket-ic/BUILD.bazel     Add dependency on serde_bytes in pocket-ic tests/build rules and include serde_bytes in test/dependency list
Enhancement	► packages/pocket-ic/CHANGELOG.md     Document Added changes for flexible canister HTTP outcalls and related pricing/replication fields
Enhancement	► packages/pocket-ic/Cargo.toml     Declare serde_bytes as workspace dependency for wiring new types
Enhancement	► packages/pocket-ic/HOWTO.md     Add documentation for Flexible canister HTTP outcalls and pay-as-you-go pricing model
Enhancement	► packages/pocket-ic/test_canister/canister.did     Extend interface to include canister_http_raw and flexible_canister_http raw entry points
Enhancement	► packages/pocket-ic/test_canister/src/canister.rs     Update canister HTTP error mapping to be generic over Into for flexibility
Enhancement	► packages/pocket-ic/tests/tests.rs     Add private ic_management_canister_types_private imports and extensive tests for flexible canister HTTP outcalls (including raw and transformed variants)