BAC-L2-SUB-115Substrate / Polkadot SDK
Smart contracts on a Substrate chain
When to open your chain to third-party code, and on what terms — the exact opposite of the reflex to put everything in a contract.
- Level
- L2 — Appchain developer
- Duration
- 4 h
- Maintainer
- Polkadot / Substrate Lead Architect
Learning objectives
- 01Enable contract execution on an application chain
- 02Deploy and call a contract from a client
- 03Decide between pallet logic and contract logic
Guided lab
Deploy a contract on your own chain and make it interact with an existing pallet.
Independent lab
Compare cost and latency for the same feature implemented once as a pallet and once as a contract.
Security angle
Opening to contracts means accepting hostile code: quotas, storage deposits and execution limits.
Assessment
Costed comparative study of the two implementations.