Questions tagged [offchain-worker]
Oracle-like capabilities for Substrate chains.
80
questions
0
votes
1
answer
17
views
URI creation best practice
What is the best practice to create a URI in an off-chain worker hook? The String and format! usage is discouraged. But what is the most convenient way to create a URI from given parts like hostname, ...
- 105
2
votes
1
answer
51
views
Calling external RPC method from OCW
I want to call an external RPC method from the offchain_worker. I checked multiple jsonrpc clients but none of them were no_std compatible. I want to know if there are any clients out there which can ...
- 131
1
vote
0
answers
37
views
Fetching offchain storage value returns different value than the value fetched using localStorageGet function
I need to get the rpc_url value set initially from the explorer. The localStorageGet rpc function returns the correct value of the rpc_url.
This returns https://eth-mainnet.g.alchemy.com/v2/MY_API_KEY
...
- 11
4
votes
1
answer
54
views
offchain-workers vs asynchronous task
There is not much info about using an asynchronous task in substrate docs i.e. task_manager in service.rs
I want to know when one should be using offchain-worker and when one should use background ...
4
votes
1
answer
50
views
Change state from a task
I have a asynchronous task running in service.spawn_essential_task(task).
Which does some stuff and wants to write data in storage. How can i achieve this?
Changing state by making runtime_apis to ...
- 43
2
votes
1
answer
94
views
AccountId in offchain worker
I'm working on Substrate based project. In the project, each blockchain validator has an offchain worker. author_insertKey() is used to set up a key so the offchain worker can sign transactions. Each ...
2
votes
1
answer
85
views
Is it possible to write-access Local Storage from the Node?
My use case is this:
an Offchain Worker sends Http requests to certain endpoints.
These endpoints are hardcoded on chain under current implementation.
I would like to be able to configure those ...
- 181
2
votes
0
answers
85
views
Offchain cache/view of on-chain storage data
I am implementing a pallet, that stores in on-chain storage (aka StorageNMap's) some user provided data. Pallet is performing offchain computations by iterating on-chain storage from offchain-worker ...
- 136
4
votes
2
answers
210
views
Read a value from offchain storage of a node
I want to read a single value from OffchainStorage of a live substrate node. Is it possible? Assume I can not use localStorageGet rpc request because it is an unsafe rpc.
- 91
2
votes
1
answer
36
views
Configure offchain worker with command line argument
Is configuring an off-chain worker with a command line argument possible?
e.g.
./target/release/cere --dev --alice --my-custom-url "http://my-..."
If not what are the other options?
1
vote
0
answers
24
views
How to connect with phala contract for creation of anonymous accounts using phala network?
I want to create anonymous account using phala network.
Here is my logic.
You need to sign with your kyc account using the password as message and verify that the account is yours inside phala ...
- 693
1
vote
1
answer
57
views
Configure OCW to run every x blocks or on demand
I understand that off-chain workers are spawned during block import, quote:
Offchain workers are spawned during each block import. However, they aren't executed during initial blockchain ...
- 189
1
vote
1
answer
71
views
Off-chain worker. Error submitting a transaction to the pool: InvalidTransaction::ExhaustsResources [duplicate]
Error submitting a transaction to the pool: Transaction pool error: Invalid transaction validity: InvalidTransaction::ExhaustsResources
It works fine in standalone but in parachain it fails.
Off chain ...
- 529
0
votes
1
answer
61
views
How to enable off-chain workers for parachain via command line?
There is no any logs and off-chain workers does not work by default.
How to specify to enable workers for parachain via command?
- 529
1
vote
1
answer
57
views
Iterate storage maps inside an offchain worker
I need to iterate over the following double map inside an offchain worker:
How can I access this map outside the pallet assets? Can I use an RPC method to get all the values for that double map ...
