Comprehensive integration tests using mock peers that verify partial
sync behavior end-to-end:
- TestPartialSyncIntegration: Full sync with 20 accounts, 2 tracked
- TestPartialSyncAllAccounts: Verifies complete account trie synced
- TestPartialSyncSkipMarkers: Verifies skip markers written correctly
- TestPartialSyncNoStorageForUntracked: No storage for skipped accounts
- TestPartialSyncRequestCount: Diagnostic showing request filtering
- TestPartialSyncVsFullSync: Compares full vs partial, shows 83% reduction
Level 2 validation was also performed using a two-node local devnet
(full node + partial node) to verify database size reduction and
correct RPC responses. The mock peer tests provide equivalent coverage
with faster execution and CI compatibility.
Part of partial statefulness Phase 2.
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