All Questions
5,154
questions
1
vote
0
answers
2
views
How to write test cases to validate if fees is paid?
I'm working on writing test cases for an extrinsic that conditionally bypasses transaction fees based on specific conditions. I need to verify whether the fees are paid or not for a given call. My ...
- 2,080
1
vote
2
answers
43
views
Should one use mutate or insert to update storage?
What should one use to update the values, mutate or insert? And why in algorithm point of view?
<SimpleMap<T>>::insert(&user, entry);
<SimpleMap<T>>::mutate(&user, |...
- 715
0
votes
0
answers
16
views
How to limit xcm transfers to sudo account
I would like to limit xcm transfers to only the sudo account, aka only the sudo account should be able to call limited_teleport_assets and move tokens to the relaychain or other parachains. How would ...
- 1
0
votes
0
answers
2
views
"overflows indirect symbol table" when compiling polkadot
Only happens when compiling the polkadot-sdk/polkadot with release profile using my macbook...
Simplly cd polkadot-sdk/polkadot and cargo build --release, using latest rustc stable (1.83.0), gives the ...
- 383
0
votes
0
answers
17
views
ERROR: Chain configuration not found in ink getting-started in cargo contract upload
I was trying the tutorial at
https://use.ink/getting-started/deploy-your-contract#using-cargo-contract
I have substrate node running in another terminal, I already had built the contract and have ...
- 101
0
votes
0
answers
16
views
Why is runtime's WASM maximum allocated memory hardcoded to 32MiB?
In sp-core it is defined the maximum memory that can be allocated by the runtime. The current max possible allocation is 32 MiB:
// substrate/primitives/core/src/lib.rs (snip)
/// The maximum number ...
- 263
0
votes
0
answers
29
views
Error executing and verifying runtime benchmark: Execution aborted due to trap
I am trying to benchmark pallet_staking for my runtime. I am on an older substrate release branch. When I try to benchmark using the command.
./target/release/borderless benchmark pallet --chain dev -...
- 45
0
votes
1
answer
16
views
Can't find substrate-node-template
I'm new to substrate.I'm following the a tutorial on youtube https://www.youtube.com/watch?v=G897F8Gw1PM&list=PL5dTjWUk_cPYdb4j2RH8BHEAK3z_ZME1j&index=2 and the substrate docs to build a local ...
0
votes
1
answer
19
views
Bad signature when CheckMetadataHash is enabled
Nodle has upgraded its testnet to 3.1.13-M which is built on top of polkadot-sdk 1.1.13. One of the motivations behind this upgrade was to allow Polkadot Generic App on Ledger to work with Nodle's ...
- 590
0
votes
0
answers
29
views
Panic running benchmarking with `pallet_identity` due to sr25519 signature
I have included pallet_identity in my runtime, but when running benchmarks, I encountered a panic with the following message:
Sr25519 not supported for EthereumSignature
It makes sense because the ...
- 384
0
votes
0
answers
6
views
Why does pallet-babe have a `MaxNominators` configuration?
Going through the pallet again for a project and I can see that it has a config item for MaxNominators which unsurprisingly has the following description:
The maximum number of nominators for each ...
- 3,832
0
votes
1
answer
12
views
How to "inspect" AccountId20 keys?
Alith has Public Address: 0xf24FF3a9CF04c71Dbc94D0b566f7A27B94566cac and
Private Key: 0x5fb92d6e98884f76de468fa3f6278f8807c48bebc13595d45af5bdc4da702133. Using subkey inspect I could not find a way to ...
- 3,832
0
votes
1
answer
14
views
Running some large computation
What will happen if I loop through 1000 or 10000 values in a vector. Will the transaction fail or block time will increase?
- 715
0
votes
1
answer
14
views
Staking through proxy
I am working on a project at bittensor blockchain, where I have delegated my wallet to a proxy address allow proxy to perform staking ops on delegated wallets' behalf.
But when I am trying to stake ...
0
votes
0
answers
10
views
Substrate Tutorial
I would like to know when the tutorials will be updated with the new GitHub repositories. I started with substrate yesterday and I found this: "(Old) Substrate Developer Hub (ARCHIVED)" so ...
1
vote
0
answers
4
views
API-sidecar hangs after bad request
Has anyone ran into a issue where the api-sidecar hangs for a very long time ( > 15 secs)?
This is potentially after a bad request: BadRequestError: The address xxx is not a stash address.
We see ...
- 11
0
votes
1
answer
36
views
Allocate extra WASM memory to generate large chainspecs
In some cases, generating a chainspec may overload the memory allocated by the WASM blob which results in an Requested allocation size is too large error:
❯ staking-node build-spec --disable-default-...
- 263
0
votes
0
answers
8
views
Loading rocks db snapshots details
Goal:
If I have a folder containing rocksdb snapshots, and I just want to load the database dump such that it can read the various pallet's state and constants.
For the context I do not need the node ...
- 11
0
votes
1
answer
17
views
Can i use subxt to to get unapplied slashes or even slashes that have occured in a live chain?
I need to get the validators and their nominators who were slashed in a particular era on a live chain. I tried to get the unapplied slashes using the snippet below. But when doing so I get the ...
- 45
0
votes
1
answer
19
views
Block sync fail after Async backing
after upgrading the async backing runtime upgrade (at block 35), my local parachain can continue to generate the block. However, when I run another archive node by the binary that supports the async ...
- 99
0
votes
0
answers
8
views
How can implement less frequent empty block and instant confirmation for transactions by modifying babe consensus?
async fn propose_with(
self,
inherent_data: InherentData,
inherent_digests: Digest,
deadline: time::Instant,
block_size_limit: Option<usize>,
) -> ...
1
vote
0
answers
12
views
How to store files in offchain worker and its hash in blockchain?
Can offchain worker be used for storing large files. I want to eliminate third party ipfs gateways for storing files.
I need a code example for uploading and storing files in offchain worker and its ...
- 715
0
votes
0
answers
12
views
Getting Core_version: Decode error
This is my first time using chopsticks. When I run
npx @acala-network/chopsticks --config=./my_chain_config.yml
I get the error
Error: Error while calling Core_version: Decode
at Block.call (rrr/my-...
- 45
1
vote
2
answers
53
views
try-runtime Report Zero Weight Despite Successful Migration Execution in Polkadot 1.0
We are currently using node-template based on Polkadot 1.0 and testing a storage migration with try-runtime. We've successfully conducted several migrations in the past, but this time we're ...
- 111
0
votes
1
answer
19
views
Latest zombienet and polkadot sdk parachain node produce only 3 blocks on parachain side
https://github.com/paritytech/polkadot-sdk/blob/717bbb24c40717e70d2e3b648bcd372559c71bd2/templates/parachain/README.md
Latest zombienet and polkadot sdk parachain node produce only 3 blocks on ...
- 539
0
votes
1
answer
23
views
XCM Transactions - Polkadot to Asset Hub (Statemint)
I understood how to create a message to send some DOT from polkadot to asset hub.
My main question is, how to track the whole flow of the transactions to be sure it succeeded?
To contextualise, I have ...
1
vote
1
answer
11
views
Calculate proof size of a function that reads state
How would one calculate the proof size of a storage read?
To give some more context. In our chain extension we have certain functions that do a storage read from the runtime. Now atm we charge weight ...
- 2,799
0
votes
0
answers
10
views
Modifying storage and calling extrinsics for overhead benchmark
I am trying to implement the Overhead benchmark command for our parachain
Here is the code I have already:
BenchmarkCmd::Overhead(cmd) => runner.sync_run(|config| {
...
- 101
1
vote
1
answer
19
views
Dedot Flipper contract flip() operation not working
I am trying to work with the default flipper contract with react js based on the link: https://github.com/dedotdev/dedot.
I am trying to follow the Submitting transactions section.
First of all, I am ...
1
vote
1
answer
25
views
Invalid JSON blob: unknown field `allianceMotion`
I am trying to generate raw json file but encounter with this error
./target/release/dip-consumer-node-template build-spec --chain plain-parachain-chainspec.json --disable-default-bootnode --raw > ...
- 1,253
4
votes
2
answers
70
views
Alternative to BlakeTwo256 for WASM Compatibility in a no_std Environment in Rust
I'm developing a Rust script that I need to convert to WebAssembly (WASM). In this script, I'm using the BlakeTwo256 hasher, which is imported from the sp_runtime crate. However, I'm unable to compile ...
- 2,080
1
vote
1
answer
16
views
What should be `Good Enough` requirement for Substrate based chain?
I am working on a Substrate based chain. I want to make sure my chain is up to par for Polkadot community.
For example: my chain should use latest Polkadot SDK stable version.
Are there other things, ...
- 557
0
votes
0
answers
7
views
how to use Substrate RPC metrics in Grafana
I need to use substrate_rpc_calls_time, substrate_rpc_calls_started, substrate_rpc_calls_finished to show RPC metrics on Grafana dashboard.
I added following section in my prometheus config file:
{
...
- 557
0
votes
1
answer
18
views
Use pruning with snapshot
I want to use polkadot chain snapshot from https://snapshots.polkadot.io/ to restore my mainnet node, but my requirement is to keep state data for 100800 blocks, while in snapshot it is showing only ...
- 1
0
votes
0
answers
8
views
Decoding keyringPair’s encoded field for private key extraction [duplicate]
I'm working with the polkadot.js library and need to extract the private key from a KeyringPair object. Using pair.toJson(password), I obtain an object with an encoded field in base64. After decoding ...
- 101
0
votes
1
answer
9
views
Substrate: How to call / import functions in the same pallet
Folders and file inside my pallet:
rpc, runtime-api, src, tests, Cargo.toml
Inside src/abc.rs:
impl<T: Config> Pallet<T> {
#[allow(clippy::indexing_slicing)]
pub fn doAction(id: ...
- 1,195
0
votes
1
answer
14
views
How to check if Relay Chain has Async Backing enabled?
According to the Async backing guide, the relay chain needs to have async backing enabled, so I was wondering what is the easiest way to check if some active relay chain (Rococo or Zombienet relay) ...
- 43
0
votes
1
answer
14
views
Error: type ConsensusHook is not a member of trait cumulus_pallet_parachain_system::Config
When trying to upgrade Parachain for Asynchronous Backing compatibility following this guide: https://wiki.polkadot.network/docs/maintain-guides-async-backing
I get the following error when compiling:
...
- 43
0
votes
0
answers
12
views
Substrate: function can be called only from offchain workers
i just made a pallet where there is a function callable from users, this function will save some input data inside a storageMap, then offchain worker take the input data, do some operations and should ...
0
votes
1
answer
36
views
In the Genesis Config, what does the `patch` key do?
When creating a genesis config, we have the ability to add a genesis.runtimeGenesis.patch.
What is the main purpose of this patch and why would I use this rather than directly setting the ...
- 16.2k
1
vote
0
answers
15
views
(Outdated Implementations) I'm working on paying block authors in Proof Of Authority (POA)
I'm currently developing a private Substrate-based blockchain and working on implementing a mechanism to pay block authors (validators) in a Proof of Authority (PoA) consensus. I've been following a ...
- 26
0
votes
0
answers
3
views
Would it be possible to show historical on-chain storage state for a particular block number?
Is there any way to present historical on-chain storage state for a particular block number?
I couldn't find way to do this. Can someone please help me to answer this?
- 557
0
votes
1
answer
29
views
The browser displays the status of the validator
Why are some consensus nodes both active and waiting?
- 21
0
votes
0
answers
27
views
How can I enable the proof size recorder during runtime testing?
I am attempting to enable and utilize the proof_size recorder host function in the runtime, but I am stuck in the runtime testing.
The default TestExternalities does not enable the recorder, so I ...
- 713
3
votes
1
answer
39
views
How to import big data into the runtime?
I am having a scenario where my chain is responsible for keeping records of airdrop accounts.
Initially, all accounts have a zero balance. When I receive a list of accounts with the respective ...
- 2,080
0
votes
1
answer
24
views
How to enable js features in substrate?
I am trying to compile my substrate node but it is giving me the issue regarding js features:
error: the wasm*-unknown-unknown targets are not supported by default, you may need to enable the "js&...
- 1,253
0
votes
0
answers
14
views
Getting Wrong ABI for the openbrush contracts
openbrush Library
when I am building the openbrush examples i am getting wrong ABI for the input of all the functions that are in the libraray.
Can anyone tell why it is happening.
e.g.
This is in ...
0
votes
0
answers
5
views
Getting `Input("rpc finalized_head failed.")` while running try-runtime
I am trying to verify runtime-upgrade through try-runtime against a live environment using below commands:
cargo build --release --features try-runtime
try-runtime --runtime ./target/release/wbuild/...
- 557
0
votes
1
answer
9
views
Are there rpc calls to show the size / transaction types in the mempool?
Are there rpc calls to show the size / transaction types in the mempool?
I've never seen any visualisation of the mempool for polkadot or substrate chains.
Other chains seem to have visibility into ...
- 3,899
0
votes
0
answers
6
views
(OUTDATED) Looking for workaround for Parity Vault (Parity Signer) not supporting DOT people chain
Disregard, PR was published today...
https://github.com/novasamatech/parity-signer/issues/812
we are looking to update our DOT sub IDs. We have been a long time Parity Vault (Parity Signer) user. ...
- 1