Questions tagged [polkadot]
Questions about the Polkadot Relay Chain
473
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What is chain decimal?
I saw token decimal has different value like 12, 10, 6 in different substrate chain, What exactly it means and what is the use of it?
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Integrating External Data into Blockchain: Can Validators Fetch and Incorporate API-sourced Data?
Is it feasible for validators to retrieve information from external APIs, particularly news data, and seamlessly incorporate it into the blockchain?
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Westend Bond TX failed with unclear reason
Would you please help me to understand why failed my bond tX
https://westend.subscan.io/extrinsic/0x70e6193b601e5e0f96cb201f5d0ead98ee752fa1a024b6b2462d7f80a8415032
My extrinsic:
signedExtrinsic {
...
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23
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can cross contract calls be done across different polkadot chains?
I have two smart contracts, one for off-chain computations (Phat Contracts) and the other from Ink which will be deployed on the Astar network. I want to access data from the phat contracts, how do I ...
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29
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What is the rationale behind the node architecture (Runtime + Host)
Is the separation of the Runtime business logic from the host intended solely for enabling forkless upgrades, or does it also aim to facilitate compatibility with different hosts?
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Is there a memo flag for transfer transaction in polkadot?
Like cosmos or beacon chain, can we attach a memo in polkadot which describes the transaction in better way?
For example while transferring dot can we attach a string like field which describes the ...
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1
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88
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Parachain not including all transactions from tx pool into block
Context
OriginTrail Parachain Mainnet is pushing significant amount of transactions (175k/day) - with tendency of growth
Collators are filling blocks up at ~25% of block weight, with a large pending ...
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7
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Metamask / Nano Ledger>
Metamask/ Nano Ledger: failed to execute requestDevide on HID. Must be handing a user gesture to show a permission request
Hello, 2 years without problems, until yesterday I did: Reset Chrome settings....
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37
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failed to get `pallet-node-authorization` as a dependency of package `node-template-runtime v4.0.0-dev
I am learning "substrate" now and I set dependence according to the tutorial as below:
[dependencies]
pallet-node-authorization = { default-features = false, version = "4.0.0-dev", ...
- 11
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1
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68
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Contribute a pallet I've written to Polkadot Relay Chain
is there a submission procedure for contributing a pallet I've written to Polkadot, for the relay chain?
I would appreciate any help with this.
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TypeError: api.tx.balances.transfer is not a function substrate contracts node
api.tx.balances.transfer was working perfectly some time ago. I tried to re-run my testcase today and I'm getting this error.
const rawTX = api.tx.balances.transfer(alice.address, 30)
...
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32
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How to compile polkadot node with only rococo runtime
When I build polkadot with cargo build --release it builds all the runtimes including Polkadot, Kusama, Rococo, Westend. This is a lot to compile and most of it is not needed.
In my case, I'm testing ...
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39
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XCM - Add remote origins execution to Polkadot/Kusama
I was wondering is there any specific reason why Polkadot still does not support XCM execution from Computed Origins LocalOriginConverter - Apologies as I'm not a Substrate developer but I looked ...
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Understanding the Concept of "Best Block" in Parachains, Relay Chains, and Solo Chains
I'm currently working to gain a deeper understanding of blockchain technologies, specifically in the context of parachains and relay chains, as well as solo chains. I'm having some confusion regarding ...
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Designing a Mechanism to Improve the Efficiency of Applications Deployed on Parachains?
As I was going through the mechanism of working of parachains , I came across a scenario that currently the time taken from collator producing a block on a parachain, to that block becoming finalised, ...
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What are the differences between these polkadot binaries: polkadot, polkadot-parachain, polkadot-prepare-worker, polkadot-execute-worker?
In the old polkadot repo release page prior to the polkadot-sdk repository merge, polkadot had only one binary called polkadot (there is also staking-miner but it has been moved to its own repo: ...
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How many collators are selected at a time or we can say same block height to authorise a parachain block?
"I'm trying to understand the mechanics of parachain block authorization in blockchain networks like Polkadot and similar multi-chain systems. Specifically, I'd like to know:
How many collators ...
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What sort of computations Coretime is goin to do?
As far as I know, on the Polkadot 2.0 update, a new feature called Coretime will be implemented on the Relaychain. It is something like the AWS lambda function execution where users have to pay for ...
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error: unexpected argument '--ws-port' found
I meet this error when create a new note. On stackoverflow, and in the suggested tip, it is replaced to --rpc-port, but in the argument there was an existing --rpc-port argument with a different ...
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34
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Multisig wallet staking via Polkadot-JS UI failed
I created a 2/3 multisig wallet and staked 500 DOT with it, but I received this error message.
This could mean your nomination has not been applied to any validator in the active set by the election ...
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how to bring bitcoin in polkadot substrate chain?
I am going through this article, where it talk about bringing bitcoin in substrate chain using iBTC. I am struggling to find resources about iBTC integrate in substrate chain. Someone please provide ...
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30
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Query for a polkadot connect parachain's lease time
Is there a simple way to query polkadot in order to get which block will be the last block of the lease period?
I want to be able to query polkadot in order to see how long a certain parachain has ...
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How to change the gas cost in ink! e2e tests
I want to be able to adjust the gas cost used in specific ink! end-to-end (e2e) tests, but my attempts to do so have consistently resulted in a return value of zero when using the weight_to_fee ...
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19
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error build_call
#[ink(message)]
pub fn get_flip2_buill_call(&mut self, token_contract_address: AccountId, account_id: AccountId )-> i32 {
let my_return_value = build_call::<DefaultEnvironment>()
...
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27
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Handling Nested Option Types in StorageDoubleMap::iter_prefix Method
I am building a Substrate pallet where I have a storage item defined as a StorageDoubleMap:
#[pallet::storage]
#[pallet::unbounded]
#[pallet::getter(fn labels)]
pub(super) type Labels<T: Config> ...
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32
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error[E0277]: the trait bound `LabelInfo<T>: parity_scale_codec::Decode` is not satisfied
i wanna to create pallet in substrate . i faced this error . how can i solve this problem ?
#![cfg_attr(not(feature = "std"), no_std)]
/// Edit this file to define custom logic or remove it ...
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13
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Polkadot.js wallet dosen't show methot section(transaction details) when making a transaction
When making a transaction we are supposed to see the transaction details under the method section but we only see method data
Wrong:
Correct(you can see the method -> assetConversion..):
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How to add custom account as initial authorities in chain_spec.rs file
I've successfully added custom accounts in the Sudo account and pre-funded accounts following this stack adding an account but I also wanted to set custom accounts as initial PoA authorities.
Thank ...
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50
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Polkadot v43 failed to send issue with tx pool
Zombienet + polkadot v43
two errors:
DEBUG tokio-runtime-worker txpool: [0xd7165975185efe4f63425ab930021c89f166fda20d0e4f564f61c9ebd491640e] Error importing: TooLowPriority { old: 13700, new: 513 }
...
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37
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Incorrect transaction fee estimation when payout
I have been working on payout in my L0 relay chain blockchain .While making payout I have observed the transaction fee that is deducted from my account and the actual fee that is been deducted are ...
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Historical Balance of Polkadot Accounts (python substrate)
Is there a way to retrieve the historical balance of a Polkadot account without the need to query every individual block? My current approach involves querying blocks in batches, but it's quite time-...
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Unable to run development node after repo migration
I tried running cargo run -- --dev after building. However i get this error 0: Invalid input: Error opening spec file dev: No such file or directory (os error 2).
I don't know rust and substrate ...
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28
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How to Check if an Address is a Node in a Substrate Blockchain Network?
I'm working on a Substrate-based blockchain network. I need to verify if a user with a specific address (e.g., 5XDDFFDF...) has added a node to the network. Depending on the verification, I want to ...
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Create Balance Transfer using a Proxy
I am trying to initiate a balance transfer call using a proxy with the 'Any' type. I'm using the Python API, which allows me to create and submit the transaction successfully. However, it fails (https:...
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Rust Compile Error: Unresolved imports crate::pallet, crate::types::Types::Config
I am working on a Rust project where I have multiple modules. I'm facing an issue with unresolved imports when I try to compile my code. Here's the relevant code structure:
types.rs
pub mod Types {
...
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97
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Is it permissible to retrieve the value of a private field within a struct from one pallet while working with another pallet?
I am developing a cross-chain NFT transfer pallet that involves transferring both item metadata and collection metadata. To accomplish this, I need to access the data field within the ItemMetadata ...
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40
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polkadot explorer getting stuck while using utility and sudo pallet from extrinsics
I am trying to do a runtime upgrade of my blockchain that is layer 0 chain running on version polkado-v0.9.36 . I also have (ethereum virtual machine integrated to it ).
When I do runtime upgrade ...
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Parachain node frequently halted for and again start syncing
We setup polkadot parachain node for asset and node frequently halted for and again start syncing.
Dockr image - parity/polkadot-parachain:latest (docker hub)
here is the docker compose file
version: “...
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85
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List IP addresses of all validators
Is it possible to determine all of the IP addresses of validators on the network? I imagine it is necessary to be able to, but is there a direct call that can be made to a running validator node?
Edit:...
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How to Securely Notify Users of New Messages in a Substrate-based Chat Application?
I'm developing a chat application using Substrate and facing a specific issue regarding user notifications. My application needs to notify users when they have a new message in a chat channel. ...
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How to generate random number of a specific length in Substrate pallet
I want to generate random number of a specific length. I can't use insecure-randomness-collective-flip because it's not recommended for production.
I also can't use rand package because it doesn't ...
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Why Substrate, Cumulus and Polkadot repositories are going to be merged into a mono-repo?
It might not be the best place to ask this question, but I'm not sure there are other place, especially since others could be interested in the answer.
Why do the 3 repositories (Cumulus, Substrate ...
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Polkadot - westend/westmint: how to create a pool using the asset conversion pallet?
We want to create a pool and we need to provide asset1 and asset2 values to the function, we are not sure what those asset1 and 2 are exactly (we are not sure what it represents or where to find it).
...
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4
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211
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Unable to execute any multisig transaction on Polkadot
I started off wanting to set and identity for a multisig I created on Polkadot, but cannot execute any transactions from the multisig.
I have an account, currently with ~6 DOT and a newly created ...
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144
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system.ExtrinsicFailed Token.NotExpendable
I'm working on a project that involves setting up a shared pot account. Anyone can fund this account, and the owner has the ability to withdraw money from it. However, I'm encountering an error: ...
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My implementation wont let me batch more than 4 transfer calls
My implementation wont let me batch more than 4 transfers. Am I doing something wrong?
I know the code is a bit complex because its normally not in one func but i has to be in this way. I am suprised ...
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panicked at 'assertion failed: `(left == right)`
I am having a setup of relay chain and two parachains are connected to it, I was running some test cases and during that i encounter an error
thread 'test::...
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Why is it required to have 405.1869 DOT in solo staking?
I am currently using Ledger Nano S to stake Dot but I am unable to receive rewards. I checked Polkadot's official website which says the minimum amount to receive rewards is 120Dot (My current bonded ...
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FailedToTransactAsset error while sending assets from local Statemint(AssetHub) to other Parachain
I'm facing the FailedToTransactAsset error while trying to send assets from Statemint to another parachain.
So basically I have the following configuration:
Relay chain
Polkadot relay chain running ...
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Getting Command failed with exit code when running substrate-parachain-template version polkadot-v1.0.0 with zombienet
I am getting the below error when I build and run substrate-parachain-template using zombienet. I am using the latest release (master branch of substate-parachain-template) which uses the latest ...
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