Reuse SidecarPeerAlignment::quorumAligned for export sidecar gates, name the shared sidecar convergence timeout, and centralize the RNG commitment tuple.
Also make ExportLimits::maxExportsPerHook the value enforced by xport_reserve, with a static assertion against the hook ABI constant.
Document the common proposal-relay path, why RNG/Export use fixed-denominator quorum over proposal-borne material, and how sidecar SHAMap fetch/proofs act as secondary distribution rather than authority.
This captures the reconciliation cost/benefit in the committed design doc, separate from the reviewer-facing PR description.
Use the fixed-denominator entropy threshold as the conflict boundary: once our entropy hash is quorum-aligned, a below-threshold conflicting minority or silent peer cannot force fallback by withholding full observation.
Update the consensus entropy invariant spine and design doc so the no-veto conflict rule is explicit, and flip the regression test to cover the liveness-preserving path.
Materialize ttEXPORT_SIGNATURES from the accepted export sidecar root during live consensus builds, then let apply trust that tx-stream witness membership while still verifying each signature and enforcing quorum.
Direct apply paths remain conservative, and historical replay uses the same witness-membership rule after manifests may have rotated. Update the intent docs and tests for live, direct, and replay modes.
Reject malformed RNG sidecar signing keys before PublicKey construction so fetched untrusted leaves cannot trigger an uncatchable LogicError abort. Also re-check proposal signatures at the extension harvest boundary so cluster-relayed invalid proposals cannot populate RNG or export sidecar state.
Encode fallback-vs-nonfallback as a ledger-defining decision, remove the prevProposers/bootstrap and visible-peer impossible-quorum shortcuts, and use proofed commit material for the timeout transition. Update unit/CSF/testnet coverage and document the remaining validation-backstopped timing residual.
Tests: x-run-tests --stop-on-fail ConsensusExtensions; x-run-tests --stop-on-fail ConsensusRng; x-format-changed; git diff --check
Thread the replay parent through ApplyOptions so export replay can rebuild the historical validator view without relying on LedgerMaster visibility for freshly replayed parents.
Harden ttEXPORT_SIGNATURES canonicality before witness indexing, validate witness signer accounts against their pubkeys, reject ambiguous absent NetworkID on low-ID source chains, and lock the consensus phase accessor.
Add focused regression coverage and clarify that destination SignerList/quorum compatibility is an operator/client contract.
State that clients expanding sfExportSignatureHash must match ExportResultBuilder's canonical signer ordering, empty SigningPubKey, and target-chain signer cap before hashing or submitting.
Validate ttEXPORT_SIGNATURES witness bindings in preflight, guard standalone witness synthesis against malformed inner transactions, and align ticket-path XPOP quorum with Export's ceiling threshold.
Regenerate the genesis hook sfcodes header and add it to generated-header verification so CI catches future drift.
Historical LedgerReplay now treats ttEXPORT_SIGNATURES witnesses as validated-history membership input, while still verifying signatures and threshold. Live build and validation keep the current manifest-backed active-signer check.
Harden witness handling by indexing only canonical same-ledger pseudos, dropping duplicate witnesses as ambiguous, and replacing pre-existing mismatched witnesses with the accepted sidecar witness during onPreBuild.
Document the lean witness-vs-XPOP proof distinction and cover the manifest-rotation replay case with an Export regression test.
