{"id":"wallet-two-tier-locking","text":"Per-wallet locks protect balance mutations; a separate `_tx_lock` protects the shared transactions list. The wallet lock is always acquired before `_tx_lock`, never the reverse.","truth_value":"IN","source":"entries/2026/06/05/digital-wallet-wallet.md","source_url":"","source_hash":"","justifications":[],"dependents":["wallet-deadlock-free-concurrent-transfers"],"metadata":{},"created_at":"","updated_at":"","reviewed_at":"","verified_at":"","retracted_at":"","explanation":{"steps":[{"node":"wallet-two-tier-locking","truth_value":"IN","reason":"premise"}]}}