Tomasz Drwięga
f3d4355a20
* Add MMR custom RPC.
* Change RuntimeApi to avoid hardcoding leaf type.
* Properly implement the new RuntimeAPI and wire up RPC.
* Extract Offchain DB as separate execution extension.
* Enable offchain DB access for offchain calls.
* Fix offchain_election tests.
* Skip block initialisation for proof generation.
* Fix integration test setup.
* Fix offchain tests. Not sure how I missed them earlier 🤷.
* Fix long line.
* One more test missing.
* Update mock for multi-phase.
* Address review grumbbles.
* Address review grumbles.
* Fix line width of a comment
Offchain Worker Example Module
The Offchain Worker Example: A simple pallet demonstrating concepts, APIs and structures common to most offchain workers.
Run cargo doc --package pallet-example-offchain-worker --open to view this module's
documentation.
Overview
In this example we are going to build a very simplistic, naive and definitely NOT
production-ready oracle for BTC/USD price.
Offchain Worker (OCW) will be triggered after every block, fetch the current price
and prepare either signed or unsigned transaction to feed the result back on chain.
The on-chain logic will simply aggregate the results and store last 64 values to compute
the average price.
Additional logic in OCW is put in place to prevent spamming the network with both signed
and unsigned transactions, and custom UnsignedValidator makes sure that there is only
one unsigned transaction floating in the network.
License: Unlicense