BAC-L3-DOT-108Polkadot
Asset transfers and remote execution over XCM
Moving an asset between chains without duplicating it, and triggering a remote call whose execution you pay for elsewhere.
- Level
- L3 — Infrastructure engineer
- Duration
- 4 h
- Track
- Polkadot
- Maintainer
- Polkadot / Substrate Lead Architect
Learning objectives
- 01Perform a reserve transfer and a teleport
- 02Pay execution fees on the destination chain
- 03Handle a message that fails on arrival
Guided lab
Transfer an asset between two local parachains and verify total supply is conserved.
Independent lab
Trigger, from chain A, a governance call executed on chain B.
Security angle
The reserve assumption: what you assume about the chain holding the original asset, and what happens if it fails.
Assessment
Transfer demonstration verified by checking balances on both sides.