Questions tagged [scale-codec]
The scale-codec tag has no usage guidance.
12
questions with no upvoted or accepted answers
7
votes
0
answers
94
views
Why do clients have to hardcode the extra types in the registry?
Context: I'm experimenting with an H160-address based substrate and I'm doing it from scratch (it's not a moon* or frontier template fork).
It's reasonably trivial to make changes to the substrate ...
- 158
5
votes
0
answers
95
views
I want to use Parity SCALE codec in Solidity? Is there any implementation of scale codec to decode bytes?
I want to decode bytes on the Solidity side that was decoded with scale codec.
Is the any implementation of scale codec (decode) on the Solidity side?
- 539
3
votes
0
answers
35
views
Why is the index of a pallet a u32(usize) instead of u8 when queried?
I'm implementing a flow where I first ask what index a pallet has with the QueryPallet xcm instruction, and then construct a call to use with Transact.
I see that to construct manually an encoded call ...
3
votes
0
answers
50
views
After using set_code_hash to upgrade contract, when decode on the new Storage，why there wont has error of "Not enough data to fill buffer"
I'm learning how to upgrade ink! contract，and have some question：
Eg：old contractA, storage define is
#[ink(storage)
pub struct MyContract {
a: u32,
}
new contractB，storage define is
#[ink(...
- 31
1
vote
1
answer
25
views
How to check the ordering of extrinsic payload for SCALE encoding in polkadot-sdk?
Below is something which I found in the polkadot-js api code
describe('ExtrinsicPayload', (): void => {
it('has a sane inspect', (): void => {
// we don't expect this to fail, however it ...
- 89
1
vote
0
answers
27
views
DOT, KSM transfer sign payload order
I want to know the scale codec order for sign payload cause currently I can't transfer WND, KSM right now
currently my codec order is
method call -> era -> nonce -> tip -> specVer -> ...
- 11
1
vote
0
answers
50
views
How to decode contract storage returned data
How do i decode this Hex string to String. It is storage data returned from a contract, using Polkadot-JS.
{
Ok: {
flags: [],
data: '...
- 121
1
vote
0
answers
29
views
How do I scale decode a Vec<u8> within an ink smart contract?
This is within my smart contract's module:
// THIS IS BEING USED: use ink::prelude::vec::Vec;
#[ink(message)]
pub fn test_encoding(&mut self) -> Result<u32, ...
0
votes
2
answers
14
views
SCALE encoding how to get 29 bits in 4 bytes
i am trying to understand the SCALE encoding spec in the jam spec, where it says you can fit 29 bits plus a prefix.
2^21 ≤ x < 2^29, where the prefix is 0b1110, and takes up the left most 4 bits, ...
- 1,466
0
votes
1
answer
25
views
KSM, WND transfer transaction fail, but DOT success
I used the same program, the same fullnode version, and the same Substrate API sidecar version to submit transfer transactions for DOT, KSM, and WND. Only DOT was successful. Two months ago, DOT, KSM, ...
- 11
0
votes
0
answers
21
views
What is the usecase of `PassBy` trait bound
While working on types between Runtime and Host functions, types going from Runtime to host function requires a PassBy trait bound while types going from Host function to Runtime does not need that ...
- 155
0
votes
0
answers
177
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