BAC-L3-COSMOS-123Cosmos SDK
Interchain Accounts and Queries
Beyond value transfer: controlling an account on a remote chain, and reading its state verifiably.
- Level
- L3 — Infrastructure engineer
- Duration
- 4 h
- Track
- Cosmos SDK
- Maintainer
- Cosmos Lead Architect
Learning objectives
- 01Open an interchain account and execute a remote action
- 02Query a remote chain's state with proof
- 03Handle latency and failure of a remote operation
Guided lab
Drive, from chain A, a delegation executed on chain B.
Independent lab
Build a service that reacts to verified remote state rather than to reported data.
Security angle
An unproven interchain query is just an oracle: separate verified reads from reported ones.
Assessment
Remote operation demonstrated and verified on the destination chain.