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Questions tagged [parachain]

Questions about blockchains connected to relay chains like Polkadot or Kusama.

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How to contribute a bulk coretime region to an instantaneous coretime pool to earn rewards and so it remains renewable indefinitely?

If you buy a Kusama Coretime core, and you we want to use your core to run a parachain, it seems you need to deposit 40 KSM to reserve a ParaID, and then you have to place a reserve deposit of ~1087....
Luke Schoen's user avatar
  • 2,346
0 votes
1 answer
43 views

How to calculate required "reserved deposit" to register a parachain on Kusama with adder-collator genesis state and code?

If a user follows the instructions in the Polkadot Wiki it is possible to Reserve ParaID and it reserves 40 KSM with the account (it is possible to deregister if necessary), but when they follow the ...
Luke Schoen's user avatar
  • 2,346
0 votes
0 answers
24 views

Runtime support for XCM message passing

Can someone help me pinpoint which pallets and APIs are required from a runtime perspective to implement support for passing XCM messages between parachains (if I decide to implement it from scratch) ?...
user2862's user avatar
  • 309
0 votes
0 answers
25 views

Error E0433: Failed to Resolve metadata_ir in the Crate Root When Using decl_runtime_apis! Macro

When upgrading polkadot-sdk from v1.2.0 to v1.3.0 I am getting the following compile error. I am encountering a compile error upgrading polkadot-sdk from v1.2.0 to v1.3.0 . The error message is as ...
Yatusabes's user avatar
  • 776
1 vote
1 answer
24 views

How to run substrate-parachain-template as parachain testnet?

everyone. Could you please help me on deploying my substrate-parachain-template as testnet? https://docs.substrate.io/test/set-up-a-test-network/ I am following this reference. But I receive this ...
Chris's user avatar
  • 11
1 vote
0 answers
25 views

Parachain stopped producing block with: Failed to finalize election round. reason ElectionError::Fallback(“`NoElection` cannot do anything.”)

My config: Relay chain - Westend local (4 nodes), Parachain1 - Westmint (1 node), Parachain2 - Custom parachain (1 node) I've launched the relay chain and parachains, then reserved the paraId for my ...
Artem Levchuk's user avatar
0 votes
0 answers
10 views

i want to send XCM message from my own react app

Can anyone help on Xcm Message I want to send message from my parachain. It work when I use Polkadot.js/app.But its not working with my own frontend tool. It says incorrect format. Can anyone tell ...
manish singh's user avatar
4 votes
1 answer
74 views

Unexpected panics after upgrading template to v1.10.0

After upgrading one of Pop template's to polkadot-v1.10.0 I noticed some unexpected logs. Even though the parachain include blocks, emits the expected events from the executed extrinsics and so on. ...
Alejandro Martínez's user avatar
0 votes
1 answer
18 views

What is the OpenGov track required to deregister a parathread?

Whilst there is this question about deregistering a parathread, it doesn't address the actual situations teams find themselves in. For example it appears that in the code, once a parachain has been ...
T9b's user avatar
  • 468
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0 answers
14 views

Unable to build substrate-parachain-template?

As i was building substrate-parachain-template on tag polkadot-v1.0.0, I encountered the following error Can anyone guide me through this.
Ipsa Gupta's user avatar
2 votes
1 answer
67 views

How to instantly seal parachain block with async backing?

I encountered this error under --dev mode. assertion `left == right` failed: slot number mismatch left: Slot(285901918) right: Slot(0) 2024-05-11 15:11:48 1 storage transactions are left open ...
AurevoirXavier's user avatar
  • 10.7k
1 vote
1 answer
38 views

Upgrade parachain collator binary from polkadot-sdk v0.9.29 to v1.1.0, failed to launch with error 'Invalid argument: column families not opened'

We're running a parachain on Polkadot Relaychain. The parachain collator binary is built based on polkadot-sdk v0.9.29 When we try to upgrade binary to a new version which is built based on polkadot-...
Brian Wu's user avatar
1 vote
1 answer
36 views

Inherent extrinsic returned unexpected error: Execution aborted due to trap: wasm trap: wasm `unreachable` instruction executed'

Our parachain is running on the polkadot relaychain, when we upgrade the runtime, we're facing the following errors shown in the collator's logs: 2024-05-09 07:43:30.376 INFO tokio-runtime-worker ...
Brian Wu's user avatar
1 vote
2 answers
38 views

Can parathreads keep producing blocks after being downgraded?

I'm using Zombienet to spawn a Relay and a parachain, using polkadot-v1.10.0. The parachain have async backing setup. When I downgrade the parachain to a parathread, it keeps producing and finalizing ...
Alexandre Ribeiro's user avatar
1 vote
0 answers
22 views

Parachain stopped producing block with: Failed to finalize election round. reason ElectionError::Fallback("`NoElection` cannot do anything.")

My config: Relay chain - Westend local Parachain1 - Westmint Parachain2 - Custom parachain I have launched relay chain and parachains then reserved paraId for my parachains. Connected parachains to ...
Artem Levchuk's user avatar
0 votes
1 answer
18 views

How to add new collator to a running parachain at runtime?

I have a parachain with kusama as relay chain and it is live. I am looking for the right set of steps to add new collators to the running chain in runtime. The initial chainspec does not have any info ...
Mrigesh Patni's user avatar
0 votes
1 answer
31 views

Do I need to create a proposal on OpenGov in order to open an HRMP channel?

I'm not sure if this is the right question to ask, but do I need to create a proposal on OpenGov in order to open an HRMP channel between Kusama AssetHub and my Parachain? Any insights or resources ...
Noah's user avatar
  • 25
1 vote
0 answers
24 views

What should be the proper XCM format?

I'm not sure if these are the right questions to ask, as I'm pretty new to the world of Cross-Consensus Messaging (XCM), but I'm really curious about how to properly create XCM instructions or an XCM ...
Noah's user avatar
  • 25
0 votes
0 answers
15 views

How to send data from parachain to relaycahin

Hello everyone I am working on a project where I need to send some data or messages from my custom parachain to a custom relaychain, then I want to map with a particular account and store it on ...
manish singh's user avatar
0 votes
4 answers
97 views

Superuser xcm origin being used on reserve asset transfer from asset hub to parachain

I'm testing a reserve asset transfer from polkadot asset hub to a parachain using chopsticks, the transfer is failing, I think this is because the xcm origin being used for the reserve asset transfer ...
Sebastian's user avatar
  • 411
1 vote
1 answer
23 views

Could not decode `ChargeAssetTxPayment::asset_id`

This is my parachain, I am getting this error while doing transaction. 1002: Verification Error: Runtime error: Execution failed: Runtime panicked: Bad input data provided to validate_transaction: ...
go11li's user avatar
  • 1,241
0 votes
0 answers
13 views

Unfortunately error when submitting transactions in polkadot

In my project when I submit the transaction I'm getting [error: polkadotxcm.filtered]
Preethi M's user avatar
1 vote
0 answers
25 views

Coretime. How to check are there any coretime assigned to parachain

Followed this instruction. https://forum.polkadot.network/t/parachain-consensus-updates-coretime-asynchronous-backing-scalability/4396/5 aura keys contains 2 accounts. Run only one collator and ...
rust.dev's user avatar
  • 519
0 votes
2 answers
76 views

Unroutable Error when performing reserve asset transfer of DOT from parachain to asset hub

I'm getting an "Unroutable" Error when performing reserve asset transfer of DOT from parachain to polkadot asset hub. I have tested it on rococo using the same wasm for the parachain and I'm ...
Sebastian's user avatar
  • 411
1 vote
0 answers
74 views

Error TooExpensive when transferring fungible assets between parachains

I'm trying to transfer fungible assets between two parachains. I'm using Westend relay chain, Westmint as first para and custom parachain as second para. I launched my setup with zombienet and opened ...
Artem Levchuk's user avatar
0 votes
2 answers
38 views

Is it it possible to change native token decimals of chain that is already running?

A blockchain I am working on enabled Frontier recently but since EVM chains' native tokens got 18 decimals by default and the chain's native token decimals are set to 12 we need to do decimals ...
chexware's user avatar
  • 325
1 vote
1 answer
16 views

How to add session keys for the collators set as invulnerables are in the nodes?

I am running collators node and I want to add session keys for the collators set as invulnerables in the node. I am using rpc author.insertKey but I am getting RPC call is unsafe to be called ...
go11li's user avatar
  • 1,241
1 vote
0 answers
14 views

How to properly execute a parachain backup and recover the chain state

I'm trying to execute a recovery from a manually stalled parachain. I'm doing the following, Backup the base-path folder for the block #30 Let the parachain produce more blocks, until #40 Brick the ...
Alexandre Ribeiro's user avatar
0 votes
1 answer
43 views

execute_block, initialize_block, apply_extrinsic, finalize_block, offchain_worker exists for struct `Executive` but its trait bound were not satisfied

I developed substrate parachain with custom pallets. Actually I wanna add OCW functionality to one of my pallets. After I updated runtime code and added CreateSignedTransaction implementation I tried ...
Artem Levchuk's user avatar
0 votes
0 answers
32 views

Rpc methods not decorated

Goal I'm trying to decorate the rpc methods to be able to interact with api.tx. If anyone has faced this issue, what has helped you out? Issue I'm not able to access tx method inside of api, which I ...
Peter Kim's user avatar
0 votes
1 answer
9 views

How to craft the xcm call from a parachain to the relay chain's registrar.swap extrinsic (for extending the parachain lease period)?

Is there some documentation explaining how to craft the xcm call from a parachain to the relay chain's registrar.swap extrinsic (in the context of extending the parachain lease period)?
Josh's user avatar
  • 425
0 votes
0 answers
11 views

Connecting a libp2p node to the Substrate Parachain Network

Goal Add a libp2p node to the Substrate parachain network to have Idle 0 peers to 1 peer. Method I'm using mdns as the discovery mechanism. Libp2p Config: const options = { peerId: peerId, addresses:...
Peter Kim's user avatar
0 votes
1 answer
32 views

Connect a local node to the Rococo Parachain Network

Issue: Currently, I have a parachain and a relay chain running on Rococo testnet locally. I'm having trouble connecting my node to the parachain network (0 peers to 1 peer). Goal: I'm trying to ...
Peter Kim's user avatar
3 votes
1 answer
35 views

chain stop producing block after adding pallet-session

I'm working on the pow substrate chain with grandpa. For that I integrate the pallet-session and substrate-validator-set[https://github.com/gautamdhameja/substrate-validator-set/tree/master] to join ...
Deepak Chaudhary's user avatar
1 vote
0 answers
14 views

"Invalid" error thrown after enabling async backing

After enabling async backing for our parachain, it started throwing an "Invalid" error every time an extrinsic is called, for example, performing a transfer or creating an asset,the strange ...
Sebastian's user avatar
  • 411
1 vote
0 answers
20 views

parachain not producing blocks?

I am using relay chain of polkadot with branch 1.1.0 of polkadot sdk. i have my relay chain running with era and epoch time of 2 minutes each . while changing lease period to 10 minutes and keeping ...
Karanvir Singh's user avatar
3 votes
0 answers
24 views

Upgrading parachain runtime for async backing "Timing by Block Number" question?

After reviewing this guide on upgrading the runtime of a parachain for async backing, I have a few questions regarding the "Timing by Block Number" section of phase 3, it mentions that ...
Sebastian's user avatar
  • 411
1 vote
1 answer
47 views

Must-have Parachain pallets

Which are the absolute must-have pallets that need to be added to a runtime to make it parachain-compatible? I am looking at the parachain template. Are the XCM helpers necessary?
lime's user avatar
  • 121
1 vote
0 answers
26 views

how to know about token implementation?

I have a questions about Tokens in polkadot ecosystem , If I am on parachain and this parachain A uses a token from another parachain B , if this token implements on_transfer hook does this hook will ...
castle_chain's user avatar
0 votes
1 answer
45 views

How can we read the smart contracts deployed on the relay chain parachain

Is there a similar feature to etherscan where codes are human readable? Or solcscan where contracts are in bytecodes? I can't seem to find any explorer.
anonauditor's user avatar
1 vote
1 answer
74 views

Opening crowdloan for already running parachain with same ParaId

Previously, if a parachain wants to continue running and extend lease on Polkadot/Kusama, after winning first slot with crowdloan, it would need to perform direct bid or to get slot with different ...
NZT's user avatar
  • 23
2 votes
3 answers
110 views

Error Bad origin on custom XCM integration

I am building custom XCM pallet. While executing specific call: The destination is of ParaId type. match send_xcm::<T::XcmSender>( (Parent, Junction::Parachain(destination.into()...
Dudo's user avatar
  • 21
0 votes
1 answer
65 views

SendFailure error when performing reserve asset transfer from rococo asset hub to parachain

I'm getting a SendFailure error(on asset hub) when performing a reserve asset transfer of ROC from rococo asset hub to a parachain, does anyone know what might be the cause? Or how can I further debug ...
Sebastian's user avatar
  • 411
1 vote
0 answers
42 views

Parachain doesn't produce blocks(collation wasn't advertised to any validator)

I'm currently engaged with the Polkadot relay chain version 1.1.0, and I've encountered an issue in the parachain where block production is not occurring. My configuration involves two validators in ...
Arunjot Singh's user avatar
1 vote
1 answer
102 views

How to list a Parachain on Rococo using CoreTime

As we know previously, securing a parachain slot was a competitive process through an auction mechanism. With coretime rental, there is no need for slot auctions anymore. Teams can purchase ...
Boleng's user avatar
  • 523
0 votes
0 answers
44 views

Parachain does not producing blocks

When I link a relay chain to the parachain using the Local chain type, it successfully generates blocks. However, upon changing the chain type to live in chain_spec.rs, block production fails, and an ...
Arunjot Singh's user avatar
2 votes
1 answer
87 views

What's coretime?

What is coretime? I do know this will affect the current parachain aution/slot model. But does this conflict with the on-demand parathread, or will it replace the existing on-demand parathread model? ...
AurevoirXavier's user avatar
  • 10.7k
1 vote
0 answers
24 views

How do I disable grandpa in polkadot-parachain?

There is a flag that you can add when running polkadot-parachain --no-grandpa Disable GRANDPA. Disables voter when running in validator mode, otherwise disable the ...
forgetso's user avatar
  • 1,514
3 votes
0 answers
104 views

What's the best practice of the On-demand parachains in 2024?

Before the Coretime, the only choice for the on-demand parachain is parathread (please correct me if I am wrong), there is a discussion https://forum.polkadot.network/t/on-demand-parachains/2208 and ...
boundless-forest's user avatar
0 votes
1 answer
45 views

error[E0576]: cannot find associated type `RuntimeCall` in trait `pallet_nfts::Config`?

"I'm developing a pallet called xnft for cross-chain NFT transfers. To achieve this, I have to utilize functions from the Frame NFT pallet and incorporate RuntimeCall in its configuration. ...
Ipsa Gupta's user avatar

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