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ICP Developer Docs

Inter-Canister Call Safety

TODO: Write content for this page.

Handle the security pitfalls of async inter-canister calls. Cover reentrancy attacks (CallerGuard pattern), the saga pattern for multi-step operations, callback traps and how to handle them, bounded vs unbounded wait (the 2MB response limit), and state rollback on call failure. Explain why inter-canister calls are the #1 source of canister bugs.

  • icskills: canister-security, multi-canister
  • guides/canister-calls/onchain-calls — basic inter-canister call patterns
  • guides/canister-calls/parallel-calls — parallel call safety
  • concepts/security — security model