BAC-L2-COSMOS-107Cosmos SDK
Designing state and storage
Designing a key space that stays queryable at millions of entries, and where every byte is justified.
- Level
- L2 — Appchain developer
- Duration
- 4 h
- Track
- Cosmos SDK
- Maintainer
- Cosmos Lead Architect
Learning objectives
- 01Design key prefixes that support efficient iteration
- 02Serialise state in a stable, versionable way
- 03Assess the replication cost of a modelling choice
Guided lab
Model the state of a cocoa traceability chain and implement its access paths.
Independent lab
Load a million entries and measure the cost of iteration queries.
Security angle
Unbounded iteration inside a message handler: the denial of service you inflict on yourself.
Assessment
Documented state model with performance measurements attached.