Bridging Substrate Based Chains to
summary
Parity’s bridge stack is a working prototype: an on‑chain GRANDPA light client verifies finality, a bridge messaging pallet queues SCALE‑encoded calls with per‑lane sequential ordering, and a standalone relayer binary available on GitHub submits headers, proofed messages and confirmations. Demo on internal testnets (milao/rialto/viator) shows a cross‑chain token transfer succeeding. Users never pay light‑client costs; relayers run full nodes and pay tx fees (bundling and a fixed relayer reward offset costs). Roadmap adds parachain trust layers and XCM payload dispatch.
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chapters (16)
- 0:00Introduction
- 2:50Interoperability
- 3:30ParaChains
- 5:55What are Bridges
- 8:09Parity Bridges Architecture
- 12:01Transfer Demo
- 15:35Using Companion Accounts
- 18:16Trust Layer
- 20:08Implementation
- 23:33Cost
- 24:52Bridge Layer
- 26:36How it works
- 28:55Incentives
- 33:35Prerequisites
- 36:04Next Steps
- 37:57Questions
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