# Developers **URL:** https://forum.availproject.org/c/developers/12.md [Latest](https://forum.availproject.org/latest.md) · [Categories](https://forum.availproject.org/categories.md) · [Tags](https://forum.availproject.org/tags.md) --- ## [About the Developers category](https://forum.availproject.org/t/about-the-developers-category/14)
**Author:** [@robin-rrt](https://forum.availproject.org/u/robin-rrt)\ **Replies:** 0
Developer-focused discussions. Utilize this space to ask for help with regard to building with Avail or troubleshooting any issues you face along the way. We would love to hear your thoughts and experience while building… --- ## [Error while getting constructed tx with api.tx](https://forum.availproject.org/t/error-while-getting-constructed-tx-with-api-tx/1351)
**Author:** [@JozzyScript](https://forum.availproject.org/u/JozzyScript)\ **Replies:** 1\ **Last updated:** [April 26, 2024, 10:31am UTC](https://forum.availproject.org/t/error-while-getting-constructed-tx-with-api-tx/1351 "2024-04-26T10:31:33Z")
Hello, I am trying to construct a transaction and broadcast it. I am offline signing the transaction. The code below is how i construct the transaction. const \[ { address: toAddress, amount, }, … --- ## [\[TEMPLATE\] Asking a good question](https://forum.availproject.org/t/template-asking-a-good-question/33)
**Author:** [@robin-rrt](https://forum.availproject.org/u/robin-rrt)\ **Replies:** 6\ **Last updated:** [April 5, 2024, 6:04pm UTC](https://forum.availproject.org/t/template-asking-a-good-question/33 "2024-04-05T18:04:42Z")
How to ask a good question: This guide from Stack Overflow is a good resource to check out how to ask a question. Use this sub-category to ask questions related to bugs and errors you face while building on Avail. St… --- ## [Thread 'tokio-runtime-worker' panicked at your/path: must have active request for stream](https://forum.availproject.org/t/thread-tokio-runtime-worker-panicked-at-your-path-must-have-active-request-for-stream/722)
**Author:** [@Nirnaeth](https://forum.availproject.org/u/Nirnaeth)\ **Replies:** 5\ **Last updated:** [April 5, 2024, 5:57am UTC](https://forum.availproject.org/t/thread-tokio-runtime-worker-panicked-at-your-path-must-have-active-request-for-stream/722 "2024-04-05T05:57:19Z")
I am running a light client but it crashed like this: 2023-12-07T08:02:38.219861Z INFO avail\_light::sync\_client: Block header 7233 already in DB 2023-12-07T08:02:38.219918Z INFO avail\_light::sync\_client: Block header … --- ## [Polygon CDK Setup guide based on Avail DA](https://forum.availproject.org/t/polygon-cdk-setup-guide-based-on-avail-da/1178)
**Author:** [@steel-feel](https://forum.availproject.org/u/steel-feel)\ **Replies:** 2\ **Last updated:** [March 26, 2024, 1:15pm UTC](https://forum.availproject.org/t/polygon-cdk-setup-guide-based-on-avail-da/1178 "2024-03-26T13:15:43Z")
Hi, i am following the CDK setup here . Is there any guide with to use Avail as DA or any config changes to current setup to achieve the same ? --- ## [WARN avail\_light::network::rpc::subscriptions: Signature verification fails with default set\_id 215, trying alternatives](https://forum.availproject.org/t/warn-avail-light-signature-verification-fails-with-default-set-id-215-trying-alternatives/1185)
**Author:** [@Nirnaeth](https://forum.availproject.org/u/Nirnaeth)\ **Replies:** 1\ **Last updated:** [March 18, 2024, 12:01pm UTC](https://forum.availproject.org/t/warn-avail-light-signature-verification-fails-with-default-set-id-215-trying-alternatives/1185 "2024-03-18T12:01:40Z")
I have started to see signature warning in light client logs. Maybe it requires investigating. Version: 1.7.9 OS: Ubuntu 22.04 2024-03-11T20:54:03.777110Z DEBUG avail\_light::maintenance: Maintenance completed block\_nu… --- ## [Error with both avail and polkadot sdk calling api.rpc.chain.getBlock](https://forum.availproject.org/t/error-with-both-avail-and-polkadot-sdk-calling-api-rpc-chain-getblock/1174)
**Author:** [@JozzyScript](https://forum.availproject.org/u/JozzyScript)\ **Replies:** 2\ **Last updated:** [March 8, 2024, 6:13am UTC](https://forum.availproject.org/t/error-with-both-avail-and-polkadot-sdk-calling-api-rpc-chain-getblock/1174 "2024-03-08T06:13:12Z")
Hello, i am trying to interact with blockchain via @polkadot ts library and the starting point is to get the latest finalized block. However, i could not manage to get a block with (I am connecting to testnet with wss:/… --- ## [Message: RPC Subscription stream should be infinite](https://forum.availproject.org/t/message-rpc-subscription-stream-should-be-infinite/797)
**Author:** [@Nirnaeth](https://forum.availproject.org/u/Nirnaeth)\ **Replies:** 12\ **Last updated:** [March 6, 2024, 11:54am UTC](https://forum.availproject.org/t/message-rpc-subscription-stream-should-be-infinite/797 "2024-03-06T11:54:44Z")
I am running avail light client on ubuntu 22.04 amd64 architecture LC version is v1.7.4. My client crashed like this: 2023-12-15T10:33:49.633435Z INFO avail\_light::network: Cells fetched from DHT block\_number=14448 cel… --- ## [ERROR avail\_light: Bootstrap process: 0: the request timed out](https://forum.availproject.org/t/error-avail-light-bootstrap-process-0-the-request-timed-out/1036)
**Author:** [@Nirnaeth](https://forum.availproject.org/u/Nirnaeth)\ **Replies:** 2\ **Last updated:** [February 12, 2024, 7:33am UTC](https://forum.availproject.org/t/error-avail-light-bootstrap-process-0-the-request-timed-out/1036 "2024-02-12T07:33:42Z")
I am trying to laucnh my light client but it can not procedd through bootstrap. OS: Ubuntu 22.04 amd64 Version: Avail Light v1.7.5 root@nirnaegen:~/avail# ./avail-light-linux-amd64 --network goldberg | ccze -A 2024-02… --- ## [Questions about Avail DA construction](https://forum.availproject.org/t/questions-about-avail-da-construction/885)
**Author:** [@NIC\_Lin](https://forum.availproject.org/u/NIC_Lin)\ **Replies:** 4\ **Last updated:** [January 8, 2024, 4:26pm UTC](https://forum.availproject.org/t/questions-about-avail-da-construction/885 "2024-01-08T16:26:03Z")
Hi all, I have a question regarding Avail’s DA construction after reading through the docs. If I understand correctly, Avail use polynomial commitment (KZG) to commit erasure-coded data so it does not require fraud proof… --- ## [OP Stack Setting up L2 configuration ERROR - "json: cannot unmarshal string into Go struct field Deployment.args of type \[\]interface {}"](https://forum.availproject.org/t/op-stack-setting-up-l2-configuration-error-json-cannot-unmarshal-string-into-go-struct-field-deployment-args-of-type-interface/566)
**Author:** [@robin-rrt](https://forum.availproject.org/u/robin-rrt)\ **Replies:** 49\ **Last updated:** [December 11, 2023, 7:08am UTC](https://forum.availproject.org/t/op-stack-setting-up-l2-configuration-error-json-cannot-unmarshal-string-into-go-struct-field-deployment-args-of-type-interface/566 "2023-12-11T07:08:17Z")
@Thanh\_Nguyen Facing the above error when trying to run an OP Stack L2 powered by Avail. Referring: --- ## [:: Abnormal Closure PORTABLEREGISTRY: Unable to determine runtime Call type](https://forum.availproject.org/t/abnormal-closure-portableregistry-unable-to-determine-runtime-call-type/563)
**Author:** [@megumii](https://forum.availproject.org/u/megumii)\ **Replies:** 11\ **Last updated:** [November 27, 2023, 9:30am UTC](https://forum.availproject.org/t/abnormal-closure-portableregistry-unable-to-determine-runtime-call-type/563 "2023-11-27T09:30:22Z")
I got this error when i try to use any examples from here https://github.com/availproject/avail-js/tree/main/examples $ npm start \> data-transfer@0.0.1 start \> tsc && node build/index.js 2023-11-27 13:01:59 A… --- ## [Please guide me to run node](https://forum.availproject.org/t/please-guide-me-to-run-node/470)
**Author:** [@Sato\_Mr](https://forum.availproject.org/u/Sato_Mr)\ **Replies:** 6\ **Last updated:** [November 23, 2023, 10:59am UTC](https://forum.availproject.org/t/please-guide-me-to-run-node/470 "2023-11-23T10:59:47Z")
I want to find the documentation to run node using Docker, where can I find it? --- ## [Error: Not signer by this signature (avail light node)](https://forum.availproject.org/t/error-not-signer-by-this-signature-avail-light-node/95)
**Author:** [@Nirnaeth](https://forum.availproject.org/u/Nirnaeth)\ **Replies:** 14\ **Last updated:** [November 21, 2023, 8:39am UTC](https://forum.availproject.org/t/error-not-signer-by-this-signature-avail-light-node/95 "2023-11-21T08:39:34Z")
I am running a Light client and synced from scratch. After synced I frequently see an error messages which is shown in the screenshot. How to diagnose and fix this? OS: Ubuntu 22.04 (arm64) Light node version: v1.7.2 … --- ## [Error: Failed to receive error message (Light Node)](https://forum.availproject.org/t/error-failed-to-receive-error-message-light-node/374)
**Author:** [@Nirnaeth](https://forum.availproject.org/u/Nirnaeth)\ **Replies:** 1\ **Last updated:** [November 15, 2023, 8:42am UTC](https://forum.availproject.org/t/error-failed-to-receive-error-message-light-node/374 "2023-11-15T08:42:21Z")
Hello I am running a light node on ubuntu 22.04 aarch64 (node version is 1.7.3) and I faced an error which shown below: 2023-11-11T09:43:42.786532Z INFO avail\_light::api::v2: Message published to clients topic=HeaderVe… --- ## [Identity / Registrar](https://forum.availproject.org/t/identity-registrar/332)
**Author:** [@Pioneer](https://forum.availproject.org/u/Pioneer)\ **Replies:** 0\ **Last updated:** [November 9, 2023, 9:06am UTC](https://forum.availproject.org/t/identity-registrar/332 "2023-11-09T09:06:51Z")
Hello community As an active participant, validator in the ecosystem, I offer an account as Pioneer my candidacy for Registrar. I would like to participate in the development of the ecosystem as a Registrar. Since the … --- ## [I can't transfer Token with Polkadot extension](https://forum.availproject.org/t/i-cant-transfer-token-with-polkadot-extension/115)
**Author:** [@Sam2021](https://forum.availproject.org/u/Sam2021)\ **Replies:** 3\ **Last updated:** [October 30, 2023, 2:51pm UTC](https://forum.availproject.org/t/i-cant-transfer-token-with-polkadot-extension/115 "2023-10-30T14:51:26Z")
Hello Admin, I can transfer Val no problem without Polkadot extension. But when I installed Polkadot extension. I can’t transfer Val. It said that : “balances.transferKeepAlive 1010: Invalid Transaction: Transaction …