feat(contracts): add emergency pause mechanism to all four contracts#297
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Leothosine merged 3 commits intoJun 26, 2026
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- Add Paused variant to DataKey enum in loyalty_token, payment, order, and restaurant_registry contracts - Add pause_contract() and unpause_contract() admin-only functions to each contract, emitting timestamped ctrl/pause and ctrl/unpause events - Add assert_not_paused_for() guard: non-admin callers are rejected with 'contract is paused'; admin can always operate - Guard all state-mutating public functions in each contract - Add 4 pause-related unit tests per contract (32 total tests all pass) Closes tosirano#288
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Summary
Implements a circuit-breaker pause mechanism across all four Soroban smart contracts (
loyalty_token,payment,order,restaurant_registry) so that an admin can halt public operations immediately in the event of a discovered vulnerability, without requiring a full contract migration.Implementation Details
The same pattern is applied consistently to all four contracts:
DataKey::Paused— new variant added to each contract'sDataKeyenum, stored as a boolean in instance storage.pause_contract(env, caller)— admin-only function that setsPaused = trueand emits a timestamped(ctrl, pause)event.unpause_contract(env, caller)— admin-only function that setsPaused = falseand emits a timestamped(ctrl, unpause)event.assert_not_paused_for(env, caller)— private guard helper: if the contract is paused and the caller is not the admin, panics with"contract is paused". Admin is always allowed to operate.Guards applied to all state-mutating public functions:
loyalty_token:mint,transfer,approve,transfer_from,burn,burn_frompayment:escrow_payment,release_payment(admin-onlyrefund_paymentis exempt by design)order:place_order,cancel_order(admin-onlyadvance_status,set_statusexempt)restaurant_registry:register_restaurant,update_restaurant,set_activeValidation Results
All 32 tests pass (0 failures):
Each contract has 4 new pause-specific tests covering:
"contract is paused"unpause_contractrestores normal operation for all callersCloses #288