Questions tagged [offchain-storage]
The offchain-storage tag has no usage guidance.
17
questions
1
vote
0
answers
29
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
2
votes
0
answers
15
views
Offchain Storage lock vs compare-set/mutate function
While using offchain workers when do we want to use a StorageLock and when would we want to use a mutate function on StorageValueRef since both of them are kind of lock on db.
2
votes
1
answer
63
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
71
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 ...
- 101
3
votes
1
answer
45
views
How to store offchain mutable values
Are there offchain storage options in substrate? Like a regular mongodb- or mysql database, I don't want to use something else and just stick with something supported with substrate stack.
The only ...
- 1,053
1
vote
1
answer
46
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 ...
- 155
0
votes
0
answers
65
views
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 "...
- 1
1
vote
2
answers
111
views
Native Substrate runtime support for storing data Offchain to IPFS
There appear to be 2 two substrate forks addressing offchain data storage with a IPFS backend:
https://github.com/iridium-labs/substrate/tree/iris
https://github.com/WunderbarNetwork/substrate/tree/...
0
votes
0
answers
29
views
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 ...
- 141
1
vote
1
answer
80
views
Off-chain local storage map?
I have an off-chain worker that needs to write a HashMap<u64,Vec<u64>> to local storage. I can see how to write a single value using StorageValueRef and how I could possibly store a ...
- 510
0
votes
1
answer
35
views
Example for sp_runtime::offchain::storage::mutate()
I could not find any example code that shows how to call mutate() for offchain storage. Looking for an example. I could only find onchain examples.
https://docs.rs/sp-runtime/latest/sp_runtime/...
- 510
3
votes
0
answers
46
views
What is transaction indexing in externalities useful for?
For example, there's a FRAME pallet called Remark which does one thing: it allows storing data in externalities that can access the node's storage via a runtime interface. If integrated into a runtime,...
- 2,570
2
votes
1
answer
58
views
How can I access a backend instance from a host function?
As given in the title, I would like to get access to an instance of the backend from a host function.
When I say 'backend instance' here, I'm referring to this. I hope to call its offchain_storage(), ...
- 510
5
votes
0
answers
106
views
How to extend a `custom RPC` service to query the `off-chain` storage? [closed]
There are many docs/tutorials explaining how to extend the node's RPC service with a Custom RPC to query the Runtime storage. What I could not figure it out yet, is how to do the same but to query the ...
- 682
9
votes
1
answer
53
views
Is there any way to get all the key/value pairs together from sc_client_db::offchain::LocalStorage?
I can see we have the option to get the values by using their keys one by one using get(), but is there any way to get all the pairs together wrapped in an iterator so that we don't need to hit the ...
- 483
6
votes
1
answer
131
views
How to extract data from Offchain storage in client-side?
I'm trying to access data that I'm storing through the RPC off-chain endpoint.
Is there any way to get the instance of off-chain storage in service.rs through which we can extract that has been ...
- 483
2
votes
1
answer
57
views
How do you test offchain_index::set?
I have code that writes to offchain_index:
offchain_index::set(&my_key, &my_data.encode());
However, my unit tests are unable to retrieve the data via:
let my_offchain_data = StorageValueRef::...
- 23