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Questions tagged [polkadot]

Questions about the Polkadot Relay Chain

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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....
Seba J. J. Bonnet's user avatar
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0 answers
24 views

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, ...
Ipsa Gupta's user avatar
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1 answer
52 views

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 ...
robinwen's user avatar
  • 101
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1 answer
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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..):
Nikola Grujičić's user avatar
0 votes
1 answer
45 views

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:...
slickfive's user avatar
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0 answers
179 views

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 { ...
Mr Coder's user avatar
  • 923
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52 views

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 ...
Boleng's user avatar
  • 521
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0 answers
37 views

Event on factory can't be emitted

I'm working on an an ink! contract and trying to establish a factory contract to enable indexing for each deployment using a subquery subgraph. For this purpose, we emit an event whenever a successful ...
Gabriel Gonzalez's user avatar
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69 views

How to wrap an ink::env::Error in a Custom Error?

In my contract, I have a requirement to call messages from external contracts without knowing their specific identities beforehand. To achieve this, I utilize the call builder, enabling the execution ...
Luca Auet's user avatar
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0 answers
36 views

the trait `StorableHint<ManualKey<1648493478>>` is not implemented

Can someone please help me figure our this issue? error[E0277]: the trait bound `ink::storage::Mapping<(ink::ink_primitives::AccountId, u64), u64, RequestUnstakingTimeKey>: StorableHint<...
go11li's user avatar
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XCM_Interaction Diagram

I am learning about the XCM format in Polkadot. I found this diagram on Paritech's Git Hub, but I don't understand its working flow yet. Explain it to me, please. thanks
Dung Nguyen's user avatar
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77 views

how to add validator in network using subxt

I am using subxt library . I have downloaded metadata from chain using this url **wss://rpc.polkadot.io:443 ** . I want to know how can i add validator to the chain using subxt library .
Karanvir Singh's user avatar
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24 views

Unpredicatable Block time in parachain?

I connected two parachains with Relay chain. While working on xcm functionality, I discovered that block time of parachain changes. Generally block time of parachain in parachain-node-template is 12 ...
Ipsa Gupta's user avatar
0 votes
1 answer
55 views

How to get a list of voters per referenda through Polkadot JS?

I am trying to assemble a list of all voters on a referendum with their votes, etc. I need help on what storage pallet to call, I tried calling the functions on the convictionVoting pallet which is ...
user4394's user avatar
0 votes
2 answers
74 views

duplicated sessionkey

In polkadot.js staking , when i put the session key, the result is "duplicated session key" I use the command in SSH "echo '{"id":1,"jsonrpc":"2.0","...
jay p's user avatar
  • 61
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1 answer
32 views

how do I add statemine to local parachain setup? where do I find the statemine repo?

I am running a local parachain setup. how do I add statemine to the network ? is there a github registry for statemine with instructions? basically I would like to setup a local relaychain with assets ...
Neo's user avatar
  • 323
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227 views

thread 'tokio-runtime-worker' has overflowed its stack

May I ask what is the issue with starting the corresponding relay chain reporting an error. Check that the disk and memory are sufficient. dell@dell:~/Test/Relay$ ./polkadot \ > --validator \ > -...
lfhuang's user avatar
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38 views

Bags-list pallet test case not running

I am using the polkadot version 0.9.36, I run test cases of all the pallets in the frame by using the cargo test command, every pallet test case is working fine but when I run the bags-list pallet ...
Akash Singh's user avatar
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0 answers
59 views

Updated version of @polkadot/api throws uncaught node error

Upgraded @polkadot/api from version 6 to version 9 Uncaught NodeError Error [ERR_PACKAGE_PATH_NOT_EXPORTED]: Package subpath './cjs/packageInfo' is not defined by "exports" in node_modules/@...
Rajkumar Tiwari's user avatar
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0 answers
20 views

Blockchain development under 200GB?

I'm trying to make meaningful code contributions to Substrate/Polkadot ecosystem in the hopes of becoming a Blockchain developer one day. I tried the Substrate approach and discovered that it takes ...
amab8901's user avatar
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134 views

how can test and check TPS in substrate?

I gonna to check and test TPS and bottleneck in substrate . what should i do for that and how can i do that in local ? please guide me for that .
Mr Coder's user avatar
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Error building the parachain template - 2 [duplicate]

I was compiling the runtime by cloning this source, https://github.com/szout/substrate-parachain-template, but at the moment I met this issue. I tried to solve this issue by referencing these QAs, ...
TinyDev's user avatar
  • 57
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0 answers
59 views

Some RPC not shown in polkadot explorer

I was checking the rpc methods in polkadot explorer and I see a lot of rpc shown as output when queried rpc-> methods. But I don't see some of them inside the rpc field. for example rpc methods ...
kroos47's user avatar
  • 59
0 votes
1 answer
61 views

panic_with_hook in session change

We are dealing with a runtime panic. We are looking for advice on how to best debug and are looking for help to get past it. At the change of an epoch we want a function to scan for a specific asset ...
Ilhan's user avatar
  • 53
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0 answers
37 views

How to convert str type to AccountID type? [duplicate]

Personally, while writing the Treasury contract, it was necessary to change the string type to the account ID type. Even if I google how to do it, I can't find a proper solution, so I'm curious what ...
isuchan0212's user avatar
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0 answers
38 views

Is it possible to pull the transactions that the Moonbeam collators are sending to the Polkadot relay chain?

Currently, working inside the Moonbeam interface and was wondering if it was possible to pull the group of transactions that the Moonbeam collators are sending to the Polkadot Relay Chain before the ...
Jap's user avatar
  • 1
0 votes
0 answers
36 views

duplicate lang item in crate std (which ansi_term depends on): panic_impl - Cannot use dependency

I was trying to use this ansi_term dependency in my project/precompiles/utils/src/lib.rs. Here is my file structure: my_parachain/ ├── ... └──precompiles/utils ├── macro ├── src/lib.rs └...
Russo's user avatar
  • 1,193
0 votes
1 answer
107 views

Get Network Peers and Node type

Is there an API to get the complete Peer List with what type of node it is from somewhere in the Polkadot/Kusama networks?
Santiago Balaguer's user avatar
0 votes
1 answer
27 views

Is it ok to use the same PotId as in the Substrate parachain template?

While configuring our parachain, in pallet_collator_selection, we used the same PotId as in the Substrate parachain template https://github.com/substrate-developer-hub/substrate-parachain-template/...
Ayush Mishra's user avatar
-1 votes
1 answer
173 views

XCM message transfer failed. relaychain report `Error: Barrier`

When I was doing cross-chain messaging (parallel chain A to parallel chain B), parallel chain A sent an XCM message (successfully). After receiving the message, the relay chain was supposed to send it ...
99kies's user avatar
  • 753
-1 votes
1 answer
101 views

Why should you start with Substrate? [closed]

Why should you start with Substrate?
James's user avatar
  • 37
-1 votes
1 answer
135 views

Can't Connect to Chain through websocket

My Polkadot-JS explorer UI does not load when i connect to the local chain and gives a websocket error. API-WS: disconnected from ws://127.0.0.1:9944: 1006:: Abnormal Closure It just started this ...
Woodfish's user avatar
  • 121
-1 votes
1 answer
80 views

What is the biggest difference between evm-enabled blockchains built on top of the substrate? [closed]

What is the biggest difference between evm-enabled blockchains built on top of the substrate
Le Thi Thuy's user avatar
-1 votes
1 answer
56 views

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 } ...
rust.dev's user avatar
  • 519
-2 votes
2 answers
247 views

expected enum `Result<_, pallet::Error<T>>` [closed]

I write codes for add item in storage but when I run this command cargo build --release it show me this error : error[E0308]: `match` arms have incompatible types --> /home/kianoush/projects/...
Kianoush Dortaj's user avatar
-2 votes
1 answer
54 views

What is Polkadot? [closed]

I am new to blockchain and I would like to understand what Polkadot is. Are there any resources that can be helpful for me to learn? Thank you
Amrith's user avatar
  • 31
-3 votes
1 answer
41 views

function or associated item not found in `parachain_info::Pallet<Runtime>`

I referred to parachain_info normally, but couldn't call his get method 717 | Parachain(ParachainInfo::get().into()) | ^^^ function or ...
99kies's user avatar
  • 753
-4 votes
1 answer
53 views

How can the BitCountry economy interact with other parachain? [closed]

how can the Bit Country economy interact with other para chains, dot ecosystems and other ecosystem?
Jack's user avatar
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