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**Update:** Pushed additional changes based on the review comments. **This pull request fixes various spelling mistakes in this repository.** Most of the changes are contained in the first **3** commits: - `Fix spelling mistakes in comments and docs` - `Fix spelling mistakes in test names` - `Fix spelling mistakes in error messages, panic messages, logs and tracing` Other source code spelling mistakes are separated into individual commits for easier reviewing: - `Fix the spelling of 'authority'` - `Fix the spelling of 'REASONABLE_HEADERS_IN_JUSTIFICATION_ANCESTRY'` - `Fix the spelling of 'prev_enqueud_messages'` - `Fix the spelling of 'endpoint'` - `Fix the spelling of 'children'` - `Fix the spelling of 'PenpalSiblingSovereignAccount'` - `Fix the spelling of 'PenpalSudoAccount'` - `Fix the spelling of 'insufficient'` - `Fix the spelling of 'PalletXcmExtrinsicsBenchmark'` - `Fix the spelling of 'subtracted'` - `Fix the spelling of 'CandidatePendingAvailability'` - `Fix the spelling of 'exclusive'` - `Fix the spelling of 'until'` - `Fix the spelling of 'discriminator'` - `Fix the spelling of 'nonexistent'` - `Fix the spelling of 'subsystem'` - `Fix the spelling of 'indices'` - `Fix the spelling of 'committed'` - `Fix the spelling of 'topology'` - `Fix the spelling of 'response'` - `Fix the spelling of 'beneficiary'` - `Fix the spelling of 'formatted'` - `Fix the spelling of 'UNKNOWN_PROOF_REQUEST'` - `Fix the spelling of 'succeeded'` - `Fix the spelling of 'reopened'` - `Fix the spelling of 'proposer'` - `Fix the spelling of 'InstantiationNonce'` - `Fix the spelling of 'depositor'` - `Fix the spelling of 'expiration'` - `Fix the spelling of 'phantom'` - `Fix the spelling of 'AggregatedKeyValue'` - `Fix the spelling of 'randomness'` - `Fix the spelling of 'defendant'` - `Fix the spelling of 'AquaticMammal'` - `Fix the spelling of 'transactions'` - `Fix the spelling of 'PassingTracingSubscriber'` - `Fix the spelling of 'TxSignaturePayload'` - `Fix the spelling of 'versioning'` - `Fix the spelling of 'descendant'` - `Fix the spelling of 'overridden'` - `Fix the spelling of 'network'` Let me know if this structure is adequate. **Note:** The usage of the words `Merkle`, `Merkelize`, `Merklization`, `Merkelization`, `Merkleization`, is somewhat inconsistent but I left it as it is. ~~**Note:** In some places the term `Receival` is used to refer to message reception, IMO `Reception` is the correct word here, but I left it as it is.~~ ~~**Note:** In some places the term `Overlayed` is used instead of the more acceptable version `Overlaid` but I also left it as it is.~~ ~~**Note:** In some places the term `Applyable` is used instead of the correct version `Applicable` but I also left it as it is.~~ **Note:** Some usage of British vs American english e.g. `judgement` vs `judgment`, `initialise` vs `initialize`, `optimise` vs `optimize` etc. are both present in different places, but I suppose that's understandable given the number of contributors. ~~**Note:** There is a spelling mistake in `.github/CODEOWNERS` but it triggers errors in CI when I make changes to it, so I left it as it is.~~
Offchain Worker Example Pallet
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.
This pallet serves as an example showcasing Substrate off-chain worker and is not meant to be used in production.
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: MIT-0