Questions tagged [decode]
The decode tag has no usage guidance.
14
questions
4
votes
3
answers
87
views
Decoding Polkadot/Kusama transactions in Rust
I would like to inspect transactions (extrinsics) in a given block to potentially:
Find different types of transactions and their parameters
Look through all transactions included in the block and ...
- 183
3
votes
1
answer
52
views
Implications of invalid encoded extrinsic calls
We are seeing the following error whenever an invalidly encoded but properly signed extrinsic is submitted in our substrate based chain.
{
"jsonrpc": "2.0",
"error&...
- 87
0
votes
2
answers
53
views
How to decode an error that happened in a proxy.proxy call
I'd like to show my users if an error occurred while doing a proxy.proxy call.
While I know how to decode a system.ExtrinsicFailed, as this is well documented, I have difficulties finding the correct ...
- 253
2
votes
2
answers
98
views
Decode preimages Bounded Dispatchable Call on a client side
I'm using Bounded trait from preimages frame that allows to store dispatchable calls, e.g. similar to the one that is used in pallet-democracy:
pub type CallOf<T> = <T as frame_system::Config&...
- 111
2
votes
1
answer
62
views
Reading arguments in chain extension
I have a question about reading data in a chain extension. To be precise, I'm concerned about methods Environment<_,_,_,S: BufIn>::read*. Do I understand correctly, that every such function ...
- 234
0
votes
1
answer
71
views
Decoding extrinsic hex into readable form in Rust
I am running the substrate-dev node. Made a transaction using Polkadot-explorer. After fetching the block using subxt I am getting extrinsic hex as:
...
0
votes
0
answers
135
views
Polkadot Explorer: decode storage system.events
I was doing some testing and sent a transaction on a custom substrate chain. On the polkadot explorer, the block which held the transaction had an error. The transaction completed; however, the ...
- 1
4
votes
1
answer
147
views
Migrate keytype of StorageMap without breakin API
Assume we have a StorageMap MyMap of which we want to extend the type of the decoded keys from KeyTypeOld to an enum including the old type as well as a new one.
Before
pub type MyMap = StorageMap<...
3
votes
2
answers
180
views
How does the encoded transaction in `Transact` turn into decoded transaction `call` when executing instructions in XCM?
let message_call = call.take_decoded().map_err(|_| XcmError::FailedToDecode)?;
https://github.com/paritytech/polkadot/blob/master/xcm/xcm-executor/src/lib.rs#L342
I got this code above and tried to ...
- 1,588
4
votes
1
answer
202
views
How can I decode an extrinsic or event dynamically in rust?
How can I decode an extrinsic or event dynamically in rust? (I want to be able to decode across all parachains)
A lot of the heavy lifting seems to be frame-metadata and scale-info. There's a desub ...
- 3,667
3
votes
1
answer
76
views
Is there a way to know what event it is without decoding the encoded extinsisc?
We are manually decoding the encoded extrinsic.
[ex 0x510284.. -> TransactionInfo{value=AccountID{address=14pT17...)]
It was confirmed that polkadot-js is well decoded through the toHuman method ...
- 495
2
votes
3
answers
128
views
What is the difference between check_extrinsic and uncheck_extrinsic?
I want to decode the polkadot's extrinsics I received through json-rpc (at rust or java).
But every time I leave a question here, there's no clear answer.
First, I'm using subxt.
(subxt : https://...
- 495
1
vote
1
answer
106
views
How to solve 'Invalid transaction version'?
use std::any::Any;
use std::io;
use subxt::*;
use subxt::{ClientBuilder,DefaultConfig, DefaultExtra};
use subxt::codec::Decode;
use crate::sp_runtime::OpaqueExtrinsic;
use sp_runtime::{
generic::{
...
- 495
5
votes
2
answers
589
views
How to decode extrinsic at json-RPC call's data(byte code)
I call json-RPC through the terminal and get the data as below.
extrinsics is raw byte, but I'm using polkadot-js(SCALE codec?) to decode it.
But I don't know which method to call.
"block": ...
- 495