SCSVS-COMM-3

S5.3 Cross-Chain Interactions

Control Objective

Ensure secure handling of external calls and atomic swaps during cross-chain interactions to maintain operational reliability and prevent fraud.

S5.3.A Handling External Calls Securely

SCSVS VR ID	Requirement	L1	L2	L3	SWE
S5.3.A1	Ensure that parameters for Chainlink VRF (Verifiable Random Function) are thoroughly validated to prevent the fulfillRandomWord function from returning incorrect values instead of reverting.		✓	✓
S5.3.A2	Implement robust security checks for cross-chain messaging to ensure correct permissions and intended functionality.		✓	✓
S5.3.A3	Verify that contracts created using the CREATE opcode handle block reorganizations securely to prevent unexpected eliminations.		✓	✓
S5.3.A4	Ensure robust cross-chain messaging security checks to prevent replay attacks where signatures valid on one chain might be exploited on another.		✓	✓

S5.3.B Atomic Swaps

SCSVS VR ID	Requirement	L1	L2	L3	SWE
S5.3.B1	Verify that the smart contract supports atomic swaps with robust mechanisms to ensure that swaps are completed successfully or not executed at all.		✓	✓
S5.3.B2	Ensure that the smart contract includes checks to validate the atomic swap conditions and prevent partial or fraudulent swaps.		✓	✓
S5.3.B3	Check that the smart contract handles potential failures or disputes in atomic swaps securely and fairly.		✓	✓
S5.3.B4	Verify that the atomic swap functionality is tested thoroughly to cover various scenarios and edge cases.		✓	✓