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Questions tagged [parachain]

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

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5 views

Start a parachain crowd loan shows "Before using this registered paraId, you need to have a WASM validation function registered on-chain"

When I try to start a polkadot parachain crowd loan on Polkadot-js apps, it shows me the following error: "Before using this registered paraId, you need to have a WASM validation function ...
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 ...
2 votes
0 answers
25 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. ...
5 votes
1 answer
69 views

How to determine if a parachain runtime migration is too big?

I want to write runtime storage migration for our parachain. This time it will scan large storage maps with more than 10k entries. This may results in very large PoV block size. I'm wondering what the ...
4 votes
1 answer
298 views

Parachain not producing blocks ? Error: Could not decode the head data

I try to start a parachain using the tutorial and don't want to use the polkadot-launch so I can fully understand the underlying structure. The relay chain works and I the parachain & relay chain ...
2 votes
1 answer
327 views

Transfer Assets with XCM

We have successfully created the HRMP channel between two parachains and a relay chain.We want to transfer assets from one parachain(p1) to another parachain(P2), the channel is created from P1 to P2 (...
1 vote
1 answer
44 views

How much internet uptime is required for running parachain or parathread?

I have a home internet connection of 80-95% uptime with 7-10 Mbps speed. Is it possible to run a parachain or parathread node without taking any cloud services? Here, is some docs: The good news is ...
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 ...
2 votes
1 answer
46 views

Parachain stops producing blocks after runtime upgrade

I am testing a parachain runtime upgrade locally. After calling the enactAuthorizeUpgrade, the parachain stops producing blocks, and the logs show error: Collation wasn't advertised to any validator. ...
0 votes
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.
2 votes
1 answer
65 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 ...
1 vote
1 answer
33 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 ...
1 vote
2 answers
37 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 ...
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-...
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?
1 vote
0 answers
18 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 ...
0 votes
1 answer
204 views

How to add new collators on a running parachain?

I'm running a Relay Chain with 4 validators. And trying to add a new collator to a running parachain. Which I've changed the desiredCandidates from 0 to 2 in the Chain Specification file. And when I ...
3 votes
1 answer
118 views

Troubleshooting Persistent Error Following Parachain Runtime Upgrade Despite Code Modification

We recently attempted a runtime upgrade on our parachain testnet (wss://moonbeam-integration-parachain.polkadex.trade) and made some modifications to the validate_unsigned code, specifically ...
2 votes
1 answer
54 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 ...
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 ...
0 votes
4 answers
95 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 ...
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 ...
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 ...
0 votes
1 answer
31 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 ...
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)?
1 vote
1 answer
22 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: ...
0 votes
0 answers
13 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 ...
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 ...
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]
1 vote
0 answers
24 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 ...
1 vote
1 answer
105 views

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 ...
1 vote
0 answers
71 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 ...
1 vote
1 answer
46 views

How to solve the error of 'Block invalid'

I'm facing this issue after starting parachain: Note: I have changed the consensus mechanism from aura to nimbus(moonbeam use this). Can anyone please help me to solve this issue ? Thanks in advance !...
0 votes
2 answers
35 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 ...
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 ...
1 vote
0 answers
13 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 ...
1 vote
1 answer
55 views

Getting error while biding in relaychain for adding my parachain into relay-chain

I'm trying to connect my parachain to a relay-chain locally via auction. I bid in the auction and set the auction ending period to 2 minutes, The bidding process is done but after the bidding I got ...
1 vote
1 answer
82 views

production-like parachain setup and launch

I wanted to try out starting multple parachain node and not only one node-collator like in this documentation. How can I remove the force-authoring successfully and have multiple nodes that uses the ...
2 votes
1 answer
88 views

Integrating Parachain-Staking Pallet in Solochain: Transitioning from POA to Proof of Stake

Is it possible to integrate the parachain-staking pallet into my solochain? I want to transition my chain's consensus mechanism from POA to proof of stake using a parachain-staking pallet in my ...
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 ...
1 vote
1 answer
26 views

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 ...
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:...
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()...
0 votes
1 answer
44 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.
4 votes
1 answer
55 views

Error- Connecting Parachain to Relay Chain: Unsupported or Invalid BabeApi Version

I have already run a relay chain on two ports, but when I try to connect my parachain to the relay chain, I encounter the following error. I have attached a screenshot of the error to this message. I ...
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 ...
0 votes
1 answer
69 views

the trait `From<xcm::v3::NetworkId>` is not implemented for `AccountId`

I was making a new way to add sovereign accounts for a particular Network ID. Like in this https://github.com/paritytech/polkadot/blob/HEAD/xcm/xcm-builder/src/location_conversion.rs pub struct ...
5 votes
1 answer
372 views

Parachain not syncing with peers

An instance is already running a parachain collator node and is producing block. Is collating: yes [Relaychain] 🏷 Local node identity is: 12D3KooWLhkaoFSGV2JfXea1BGTEAv2R5PE4v2b1nHZMo1ZGtXDG [...
5 votes
1 answer
84 views

How many collators can a parachain have?

I think this should be split into 2 questions: How many total collators can a parachain have ? How many collators can collate at the same block height ? I suspect those number would be approximative ...
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 ...

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