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Questions tagged [parachain]

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

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How can we bridge our Solochain with other chains within the Polkadot Ecosystem? Should it be a parathread or parachain migration?

How can we bridge our Substrate-based Solochain with other parachains within the Polkadot Ecosystem? Should it be a parathread or parachain migration?
Josh's user avatar
  • 425
2 votes
1 answer
147 views

Parachain doesn't producing block

I was building a Parachain using Zombienet. However, I was having trouble generating blocks on Parachain. Does anyone have any idea why this might be? Relaychain and Parachain using v0.9.37 version ...
Cute_Wisp's user avatar
3 votes
2 answers
113 views

how we can migrate the solochain data to the parachain?

If we currently have the live solochain and in future we need to go on parachain how we will migrate the data from the existing solochain to parachain.
Pankaj's user avatar
  • 2,021
0 votes
1 answer
48 views

How to enable the teleportation for genesis hash in the parity-bridges

How to write the genesis hash in the teleportation to enable the communication of two chains through bridge.By adding the genesis hash it will be easier for the one chain to reach another chain. ...
Arunjot Singh's user avatar
2 votes
1 answer
42 views

Transfering the parachain slot to other parachain

For curiosity, if one organization wins the slot in the parachain auction, can it transfer the slot to another parachain? Or if I deregister the parachain, is the slot also released?
Jay Pan's user avatar
  • 75
2 votes
1 answer
63 views

Modify the Genesis file/WASM after getting the slot but before the parachain creates the block

I want to find a way to check whether the parachain's genesis file/WASM can be changed after getting the slot but before creating the first block by the users who registered the parachain. Is that ...
Jay Pan's user avatar
  • 75
4 votes
1 answer
68 views

Is there any constrain forced on Parachains for block authoring logic?

I am reading Cumulus PDK and Parachain documentations, and looking forward to converting our project to a parachain and join the Polkadot ecosystem. However, I am confused regarding the parachain ...
Yeou's user avatar
  • 229
2 votes
1 answer
120 views

Creating offline transaction for parachains

From my research of how to generate and sign transactions offline I found docs: https://wiki.polkadot.network/docs/build-transaction-construction citing txwrapper-core: https://github.com/paritytech/...
Tadej Vengust's user avatar
1 vote
1 answer
117 views

Astar RPC endpoint returns error between block 1558933 to block 1848933

I am trying to query the historical data (tx, ownership, etc.) of Cosmize Ticket NFT on Astar EVM. I got the error message when querying between block 1558933 to block 1848933. Below is how to ...
Ben's user avatar
  • 11
1 vote
1 answer
54 views

preimage pallet is added, it shows up in extrinsics > preimage, but does not show up in chain > storage > preimage

Added preimage pallet here, (because it seems to be a necessity in the > polkadot-0.9.37) It shows up in `developer > extrinsics > preimage but does not show up in query > preimage... I ...
Ramsey - Decentration's user avatar
1 vote
1 answer
102 views

How to implement a production randomness pallet?

Hey valuable community member, I am currently on a randomness pallet which can be used as a production counterpart to the insecure randomness-collective-flip pallet. This is my current version: https:/...
Chralt's user avatar
  • 543
1 vote
2 answers
66 views

Release crowdloan funds before lease expires?

would it be possible to deregister a parachain and release tokens locked from crowdloan using governance in relay chain?
lordofdalords's user avatar
4 votes
1 answer
108 views

Parachain cannot build blocks after winning a slot

We have a slight issue: we won a parachain slot on Saturday and are still waiting to produce blocks this Monday. https://polkadot.subscan.io/block/14512138?tab=event We should be producing blocks by ...
AwesomeIbex's user avatar
1 vote
1 answer
56 views

Syncing a new node, prepopulate db with polkadot

When syncing a new node from scratch it takes several days just to transfer and validate the polkadot chain. Comparing two runs reveals there are no simulates at all with the sst files. Is there an ...
Simson's user avatar
  • 1,201
1 vote
1 answer
67 views

Off-chain worker. Error submitting a transaction to the pool: InvalidTransaction::ExhaustsResources [duplicate]

Error submitting a transaction to the pool: Transaction pool error: Invalid transaction validity: InvalidTransaction::ExhaustsResources It works fine in standalone but in parachain it fails. Off chain ...
rust.dev's user avatar
  • 519
2 votes
1 answer
55 views

What is happening between `Is collating: yes` and ` Local node identity is:...` or why is it taking so long time to restart syncing of a crashed node?

I'm trying to sync a parachain node from scratch with a client upgraded to polkadot0.9.37 I have experienced crashes and restarts after a few hours and with every subsequent restart it seems to take ...
Simson's user avatar
  • 1,201
0 votes
1 answer
58 views

How to enable off-chain workers for parachain via command line?

There is no any logs and off-chain workers does not work by default. How to specify to enable workers for parachain via command?
rust.dev's user avatar
  • 519
3 votes
1 answer
68 views

Solochain to Parachain Block Production Problem - "Discarding slot xxx, block production took too long"

The following is a current issue when migrating from a Solochain to a Parachain (presently as a test on the Rococo relay chain): On the Rococo chain, we are unable to produce new blocks - it is ...
Josh's user avatar
  • 425
1 vote
1 answer
47 views

How to run "paras" extrinsics on local setups

I would like to test a few scenarios about relaychain council / sudo can update our parachain code in case of emergency. I searched over the web, and try to use "paras" module to do such, ...
Gonzalo Cerro's user avatar
6 votes
1 answer
387 views

Parachain missed blocks due to relay wrong announcement?

On February 20, 2023 around 22:08 UTC, Shiden block production has been hurt and almost stopped during 40 minutes.A lot of collators were missing blocks for no apparent reason. Examples of blocks that ...
bLd's user avatar
  • 182
3 votes
1 answer
65 views

"Contracts on Rococo" down?

gm, tried setting up my boilerplate https://inkathon.xyz with contracts on rococo as suggested in the docs: https://use.ink/testnet. unfortunately, neither i'm able to receive funds from the faucet (...
Dennis Zoma's user avatar
2 votes
1 answer
109 views

Can we migrate the existing solo chain blocks to another substrate chain?

I've been working on data migration from the existing solo chain to the Relay Chain. I've already fetched most of the data but i need to know about fetching the blocks. Is there any way to fetch the ...
Arunjot Singh's user avatar
0 votes
1 answer
52 views

can we run MoonBeam as solo chain instead of Para chain

I have cloned the repo of MoonBeam and run the chain as a "Development chain" but the chain is not producing blocks. Are there any reference links which i can follow to remove dependency ...
BlockBird's user avatar
1 vote
1 answer
45 views

What can a parachain sovereignAccount be used for and why does it differ the Treasury Account?

The question comes in three parts: Each parachain has its own sovereignAccount which can be calculated as described in the answer to this question, but how is that account used since it can receive ...
T9b's user avatar
  • 468
2 votes
1 answer
158 views

WeightLimitReached Error occured when executing ReserveTransferAssets with XCM

I'm testing the ReserveTransferAssets, but it didn't work well. When Trappist chain send XCM from statemine to base Parachain, WeightLimitReached and xcmpQueue.OverweightEnqueued error occurred. But I ...
andrun learn's user avatar
0 votes
1 answer
62 views

Extrinsics ejected from pool with subxt::tx::TxStatus::Invalid error

What are possible explanations why sub subxt::tx::TxStatus::Invalid The documentation is very brief about it: Invalid The transaction is no longer valid in the current state. Could someone please ...
Simson's user avatar
  • 1,201
0 votes
0 answers
29 views

Our on_initialize function takes approximately 5 seconds, this breaks the parachain eventually

We need to run an on-initialize function that runs for 5 to 6 seconds. The error we run into when we do this is "Block production took too long". We have tried to increase the ...
shibshib's user avatar
  • 127
3 votes
0 answers
177 views

start parachain collator node encounter relay chain block sync problem

I make a parachain rococo test net practice following this tutorial. But I encounter issue after start collator node: [Relaychain] cannot query the runtime API version: UnknownBlock: State already ...
Bill.W's user avatar
  • 31
0 votes
0 answers
89 views

revert option is not working

We are facing a returning "Too many sibling blocks inserted" error then all 4 collator nodes would stop block production. I did some research into the issue and one of the possible solution ...
Zoltan75's user avatar
1 vote
2 answers
81 views

How to Start Parachain Node with disabled P2P?

Is there a way to start a parachain node in CI and instruct it through a binary flag not to sync with the relay chain? I think it would be the same to say I want the P2P functionality to be off. Thank ...
demisx's user avatar
  • 113
2 votes
1 answer
285 views

Best practices for generating and monitoring transactions

So I am building a service that will be creating high amount of transactions on different substrate base chains. The infrastructure I have in mind is having microservices that will generate ...
Tadej Vengust's user avatar
2 votes
2 answers
72 views

Do we have any checklist or Guide for mainnet launch on polkadot?

Moving forward i need to launch the parachain on polkadot. Do we have any checklist or Guide for mainnet launch on polkadot?
Pankaj's user avatar
  • 2,021
1 vote
1 answer
42 views

Debugging parasDisputes

We noticed on Jan 19 that kintsugi (our kusama para) did not finalize blocks for about 60 minutes. It seems the cause is likely rooted in disputes being raised. In turn, a lot of dispute events fired ...
Dominik Harz's user avatar
2 votes
2 answers
43 views

Is there any guide available at the moment that explains the process of migrating a parachain back to a solo chain?

I found some guides, like this: https://docs.substrate.io/reference/how-to-guides/parachains/convert-a-solo-chain/ that help you to convert a solo chain to parachain. However, I would like to know if ...
rirotho's user avatar
  • 113
1 vote
1 answer
119 views

How to use ClaimAssets after assets got trapped

If Alice sends some amount of native relaychain assets to Alice on a parachain and those assets got trapped in some reason, for example lack of amount to execute a message. For AssetTrap and ...
N1ght's user avatar
  • 31
3 votes
1 answer
153 views

Can a parachain recover from a "block taking too long" error?

We have a parachain testnet running on a local relaychain based on rococo v2. The Parachain is based on Cumulus (Polkadot and Substrate) v0.9.36 - so at the time of writing is the most up-to-date ...
T9b's user avatar
  • 468
1 vote
1 answer
54 views

What root dispatches are absolutely necessary to run a parachain?

I am currently developing an alternative to Sudo and Democracy. I wish to have a sudo key account, which is allowed to upgrade the chain, but only after a three month review period, the upgrade can ...
Chralt's user avatar
  • 543
1 vote
1 answer
47 views

Use polkadot-v0.9.33 or hight verison bianry launch local parachain onborading fails

Using the ts code to call the parasSudoWrapper.sudoScheduleParaInitialize interface to register the parachain locally, the parachain has not produced blocks.. It is only a parathread found in the ...
Chengcheng Shi's user avatar
3 votes
1 answer
67 views

How to launch substrate chain on server?

Currently i am running my Parachain on rococo-local and it is working as expected. Now i need to host my parachain on server so that my app can use it. Is there any guide/process how can i do it?
Pankaj's user avatar
  • 2,021
2 votes
2 answers
72 views

On Server parachain sudden stopped producing block

Polkadot version i am using is: V0.9.36. I am running the parachain with local environment on server. The parachain sudden stopping producing the blocks. I have looked at the logs but not get any ...
Pankaj's user avatar
  • 2,021
0 votes
0 answers
98 views

How to rescue a parachain from "Could not find header of the genesis block in the database" error?

I have a situation where I uploaded the genesis wasm and state to the relay chain network, and then proceeded to make a few changes to the parachain node after that and compile it. When I ran the new ...
Purple_Turtle's user avatar
1 vote
1 answer
23 views

Why is the ordering for the following collator support modules important?

In the parachain template we see this snip of code: // Collator support. The order of these 4 are important and shall not change. Authorship: pallet_authorship::{Pallet, Call, Storage} = 20, ...
Purple_Turtle's user avatar
0 votes
1 answer
134 views

XCM: How to send assets from the local chain to another via democracy?

I am looking into XCMv2 and given the standard XcmOriginToCallOrigin configs on both chains: and environment: HydraDX runtime & Acala runtime. I was able to construct a polkadotXcm.send call to ...
jgreen's user avatar
  • 21
2 votes
3 answers
146 views

What should be ideal hardware specifications for a Parachain?

We are working on a parachain and planning to integrate with Polkadot relay chain. When we deployed our parachain on testnet and tried to integrate with Rococo, we realised that less than 500 GB and 8 ...
Boleng's user avatar
  • 521
3 votes
2 answers
247 views

Sync a parachain node quickly

Is it possible to use a snapshot of the relay chain to synchronize a Substrate-based parachain and run a parachain node, as the process of synchronizing the relay chain can take a significant amount ...
vivek sharmapoudel's user avatar
3 votes
2 answers
155 views

How can I connect my old Parachain to my new Relaychain?

How can I connect my old Parachain to my new Relaychain? The first thing I did is to recreate the chainspec using export-state: (9062 is my last block) ./target/release/my-parachain export-state \ --...
hgminerva's user avatar
  • 467
3 votes
1 answer
117 views

I want to send Transact XCM Message with TransferReserveAsset XCM Message from Relay Chain to Parachain

I want to send some extra information ("Call") with the TransferReserveAsset Message. As it has an extra field called xcm:- TransferReserveAsset { assets: MultiAssets, dest: MultiLocation, ...
ZKT's user avatar
  • 113
4 votes
2 answers
80 views

Substrate based parachain light client seems to gets connected but ApiPromise is not returned

I am trying to implement smoldot @substrate-connect light client to my DApp using chain specs of a substrate-based parachain. Substrate connect extension is able to discover the parachain as it shows ...
vivek sharmapoudel's user avatar
1 vote
1 answer
173 views

In custom Rococo staging and Westend staging network parachain is not producing blocks

I have made the rococo relay chain and parachain network successfully following this tutorial, and was also able to generate the network with custom keys on relay chain and parachain with rococo-local ...
Shubham Gupta's user avatar
0 votes
1 answer
112 views

Xcm V2Traits Error UntrustedTeleportLocation

When I'm sending assets from relay chain to a parachain by using Limited Teleport assets. I`m facing this issue
Arunjot Singh's user avatar

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