Questions tagged [offchain-worker]
Oracle-like capabilities for Substrate chains.
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offchain indexing for large files
I'm new to the project and currently working on a pallet, which is supposed to deal with large files offchain. Pallet, offchain indexing and the offchain worker are all working fine, still I get "...
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Is there any way to interact between ink smart contract and off-chain worker?
I know that we can interact between smart contract and runtime (and vice versa) but I can not find a way that I can fetch data from API (in off-chain worker pallet) and pass those data to the smart ...
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How to verify that a signed payload of an unsigned extrinsic is signed by a local account?
I've been following the how-to guide to implementing unsigned extrinsic call with a signed payload.
My pallet defines the following KeyTypeId:
pub const KEY_TYPE: KeyTypeId = KeyTypeId(*b"ver!&...
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Implementing an Identity Management pallet, would be more efficient in a Relay or Parachain?
I'm implementing an Identity Management pallet for an administrative ecosystem.
Suppose that using the same architecture as Polkadot.
Questions
It would be more secure, efficient and scalable to have ...
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Offchain Worker Not Initializing - Cumulus Parachain Template
I am observing unexpected behavior with the Cumulus Parachain Template. Our pallet uses off-chain workers (OCW), and the functionality successfully runs when we attach it to the Substrate Node ...
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how does work offchain in substrate ( pokadot ) [closed]
I Wanna know about off-chain in the substrate ( Polkadot ) how does work?
How is it mine from the onchain ( main chain in Polkadot )?
maybe somebody wants to hack the off-chain and they do it a ...
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Enabling Offchain workers in a parachain
I know the way to enable ocw in a solo chain is to edit the service.rs as per the documentation and it works perfectly. I have tried making equivalent changes to the service.rs in my parachain but ...
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Can an off-chain worker read/write the state of an EVM contract?
Let's assume we have a frontier-based node with smart contract X. From an off-chain worker, we want to call X.some_method() which will return data, and then the worker would use this data to make some ...
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How to get data to off-chain worker from runtime?
Is any option to get data to off-chain workers from runtime?
For example, I have used runtime to store something.
How can I access this data from off-chain woker without using HTTP calls?
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Is there a way to create a peer to peer network on top of substrate?
Most of substrate tutorials are based on on-chain logic so there's not much information on this topic. Is there a way to use Substrate's in-built p2p network for other purposes such as constant ...
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using any account for offchain worker signed transaction
I'm trying to implement the following sequence:
Alice calls extrinsicA
extrinsicA calls off-chain worker
off-chain worker invokes an external service
off-chain worker uses Alice for a signed ...
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Working up-to-date complete source code for offchain workers?
Hello Substrate community
I've been trying to integrate an offchain worker capable of API calls on top of an existing Substrate cluster of 3 nodes I already have up and running successfully (based on ...
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Enabling off-chain workers for substrate-node-template
I'm trying to test offchain workers in my local substrate node.
It seems that by default the ocw is not enabled? I've only been able to see logs from ocw's when running the node with the --dev option (...
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What is Offchain Call in TransactionSource?
What is an Off-Chain Call in this scenario?
for instance an Off-Chain Worker, or an Off-Chain Call
source: https://github.com/paritytech/substrate/blob/master/primitives/runtime/src/...
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How to write a dispatch function which can only access from offchain worker with signed extrinsic/transaction?
I want to modify some on-chain storage from offchain worker by sending a signed transaction, so I write a dispatch function which handles the transaction. But the dispatch function also can be ...
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