# ⚙️ Flow SDKs **URL:** https://forum.flow.com/c/flow-sdks/8.md [Latest](https://forum.flow.com/latest.md) · [Categories](https://forum.flow.com/categories.md) · [Tags](https://forum.flow.com/tags.md) --- ## [About the ⚙️ Flow SDKs category](https://forum.flow.com/t/about-the-flow-sdks-category/113)
**Author:** [@Mackenzie](https://forum.flow.com/u/Mackenzie)\ **Replies:** 0
Anything Flow SDK related? This is the place for you --- ## [How I Fixed Wallet State Issues Using FCL with Flow JavaScript SDK](https://forum.flow.com/t/how-i-fixed-wallet-state-issues-using-fcl-with-flow-javascript-sdk/8085)
**Author:** [@tisabib](https://forum.flow.com/u/tisabib)\ **Replies:** 0\ **Last updated:** [July 27, 2025, 2:59pm UTC](https://forum.flow.com/t/how-i-fixed-wallet-state-issues-using-fcl-with-flow-javascript-sdk/8085 "2025-07-27T14:59:35Z")
Hello I ran into an issue while using the Flow JavaScript SDK (FCL) in my project. After logging in with a wallet; everything worked fine until the user refreshed the page. :innocent:The wallet state didn’t persist prop… --- ## [I want Guidance & Real-World Tips 🚀](https://forum.flow.com/t/i-want-guidance-real-world-tips/7851)
**Author:** [@Catherine](https://forum.flow.com/u/Catherine)\ **Replies:** 0\ **Last updated:** [May 16, 2025, 10:12am UTC](https://forum.flow.com/t/i-want-guidance-real-world-tips/7851 "2025-05-16T10:12:28Z")
Hey Flow fam! I started exploring the Flow JS SDK and while it’s been super fun, I will admit I am a bit lost in terms of best practices and how to structure things properly. I have got some experience with frontend st… --- ## [Flow JS SDK Error: Response closed without headers](https://forum.flow.com/t/flow-js-sdk-error-response-closed-without-headers/1889)
**Author:** [@dh77](https://forum.flow.com/u/dh77)\ **Replies:** 17\ **Last updated:** [June 5, 2023, 7:49pm UTC](https://forum.flow.com/t/flow-js-sdk-error-response-closed-without-headers/1889 "2023-06-05T19:49:39Z")
Hey everyone, I’m using Flow JS SDK on the backend. When running this script: const response = await sdk.send(await sdk.build(\[ await sdk.getAccount(testNodeAddress) \]), { node: testNetNode }) it shows an er… --- ## [Flow JVM SDK v2.1.1 Release Notes](https://forum.flow.com/t/flow-jvm-sdk-v2-1-1-release-notes/6879)
**Author:** [@lea\_l](https://forum.flow.com/u/lea_l)\ **Replies:** 0\ **Last updated:** [November 28, 2024, 6:37pm UTC](https://forum.flow.com/t/flow-jvm-sdk-v2-1-1-release-notes/6879 "2024-11-28T18:37:28Z")
Key updates included the Flow JVM SDK version 2.1.1 release: Update FlowAccessAPI models to match latest version of Flow protobuf (non-breaking changes). This update returns a more thorough Access API response with add… --- ## [Summary of Changes to Ledger Transactions for Cadence 1.0](https://forum.flow.com/t/summary-of-changes-to-ledger-transactions-for-cadence-1-0/5662)
**Author:** [@flowjosh](https://forum.flow.com/u/flowjosh)\ **Replies:** 4\ **Last updated:** [February 15, 2024, 10:51pm UTC](https://forum.flow.com/t/summary-of-changes-to-ledger-transactions-for-cadence-1-0/5662 "2024-02-15T22:51:51Z")
As part of the Cadence 1.0 upgrade, the flow team is updating all the transactions for the ledger hardware wallet to be compatible with the Cadence changes as well as the changes to the NFT standard and NFT standard. Th… --- ## [How to set and get the accessNode in Mobile using Kotlin FCL](https://forum.flow.com/t/how-to-set-and-get-the-accessnode-in-mobile-using-kotlin-fcl/5196)
**Author:** [@marianomoxy](https://forum.flow.com/u/marianomoxy)\ **Replies:** 5\ **Last updated:** [September 8, 2023, 1:01pm UTC](https://forum.flow.com/t/how-to-set-and-get-the-accessnode-in-mobile-using-kotlin-fcl/5196 "2023-09-08T13:01:32Z")
Hello everyone! I am doing an integration of the FCL in kotlin and swift importing “com.portto.fcl.Fcl” (kotlin) and “FlowSDK” “FCL\_SDK” (swift). Is there a possibility to set the accessNode as it is done in JS SDK? an… --- ## [Account Generation Java Script](https://forum.flow.com/t/account-generation-java-script/4829)
**Author:** [@Pankaj](https://forum.flow.com/u/Pankaj)\ **Replies:** 0\ **Last updated:** [May 30, 2023, 5:26pm UTC](https://forum.flow.com/t/account-generation-java-script/4829 "2023-05-30T17:26:31Z")
I am trying to generate account by using @onflow/fcl library. I do not want any frontend or browser to execute my code. I will just make an API for generating account. But facing too many errors. --- ## [Unable to send transactions to testnet using flow go sdk](https://forum.flow.com/t/unable-to-send-transactions-to-testnet-using-flow-go-sdk/4654)
**Author:** [@OnlyTortoise](https://forum.flow.com/u/OnlyTortoise)\ **Replies:** 5\ **Last updated:** [April 28, 2023, 11:30am UTC](https://forum.flow.com/t/unable-to-send-transactions-to-testnet-using-flow-go-sdk/4654 "2023-04-28T11:30:16Z")
I’m trying to send a transaction that looks like this: ctx := httpRequest.Context() flowClient, \_ := flow\_http.NewClient(flow\_http.TestnetHost) address := flow.HexToAddress(MY\_ADDRESS) account, \_ := flowClient.GetA… --- ## [How to Provide Complex Types As "arg" For A Transaction Using FCL](https://forum.flow.com/t/how-to-provide-complex-types-as-arg-for-a-transaction-using-fcl/4613)
**Author:** [@sayeedkhalshi](https://forum.flow.com/u/sayeedkhalshi)\ **Replies:** 0\ **Last updated:** [April 14, 2023, 10:54am UTC](https://forum.flow.com/t/how-to-provide-complex-types-as-arg-for-a-transaction-using-fcl/4613 "2023-04-14T10:54:04Z")
I am getting an error for using any type. e TypeError: Cannot read properties of undefined (reading 'asArgument') My code - const cadence = \` import Vevent from 0xCanvas import VeventVerifiers from 0xCanvas … --- ## [How to get flow balance at certain block height?](https://forum.flow.com/t/how-to-get-flow-balance-at-certain-block-height/4091)
**Author:** [@newbdez33](https://forum.flow.com/u/newbdez33)\ **Replies:** 0\ **Last updated:** [January 21, 2023, 11:10am UTC](https://forum.flow.com/t/how-to-get-flow-balance-at-certain-block-height/4091 "2023-01-21T11:10:29Z")
Hello, I’m actually trying to get my balance at certain time. I have tried const response = await fcl.block({height: 45118000}).send(\[fcl.script${script}, fcl.args(args)\]); but it doesn’t work. Thank you! --- ## [Password authentication failed for user "kittyuser"](https://forum.flow.com/t/password-authentication-failed-for-user-kittyuser/1479)
**Author:** [@Mio](https://forum.flow.com/u/Mio)\ **Replies:** 2\ **Last updated:** [January 19, 2023, 2:54pm UTC](https://forum.flow.com/t/password-authentication-failed-for-user-kittyuser/1479 "2023-01-19T14:54:26Z")
Hi there, Trying to run “kitty-items-js” by following its instruction on “kitty-items” GitHub page: However, there seems to be an error related to password authentication ( see below ): flow-kitty-items@0.0.1 start:… --- ## [Where to find a "Collection ID"?](https://forum.flow.com/t/where-to-find-a-collection-id/4001)
**Author:** [@JimmyGee](https://forum.flow.com/u/JimmyGee)\ **Replies:** 2\ **Last updated:** [January 16, 2023, 11:13am UTC](https://forum.flow.com/t/where-to-find-a-collection-id/4001 "2023-01-16T11:13:16Z")
Hi. So I’m trying to use this “https://rest-mainnet.onflow.org/v1/collections/{id}” from the documentation here developers.flow . com/http-api#tag/Collections to check out the UFC Strike collection. Where do I find the c… --- ## [Is Bulk Minting is possible in FLOW-FCL](https://forum.flow.com/t/is-bulk-minting-is-possible-in-flow-fcl/4004)
**Author:** [@Shivam001](https://forum.flow.com/u/Shivam001)\ **Replies:** 1\ **Last updated:** [January 6, 2023, 11:48pm UTC](https://forum.flow.com/t/is-bulk-minting-is-possible-in-flow-fcl/4004 "2023-01-06T23:48:54Z")
const mint = async () =\> { try { const transactionId = await fcl.send(\[ fcl.transaction(mintNFT), fcl.args(\[ fcl.arg(hash, t.String), fcl.arg(name… --- ## [Pre-authz failed - payload too large Error](https://forum.flow.com/t/pre-authz-failed-payload-too-large-error/3962)
**Author:** [@developer.mobilefirs](https://forum.flow.com/u/developer.mobilefirs)\ **Replies:** 0\ **Last updated:** [December 14, 2022, 5:40am UTC](https://forum.flow.com/t/pre-authz-failed-payload-too-large-error/3962 "2022-12-14T05:40:49Z")
\*\* pre-autz failed when minting large images. anything beyond 300kb pre-autz fails \*\* --- ## [Account proof](https://forum.flow.com/t/account-proof/3901)
**Author:** [@guest](https://forum.flow.com/u/guest)\ **Replies:** 1\ **Last updated:** [November 28, 2022, 10:11am UTC](https://forum.flow.com/t/account-proof/3901 "2022-11-28T10:11:50Z")
Hi all, I have some questions regarding account proof implementation/purpose. https://github.com/onflow/fcl-js/blob/master/docs/reference/proving-authentication.mdx If my application backend has some wallet-associated … --- ## [Computation limited exceeded:](https://forum.flow.com/t/computation-limited-exceeded/3707)
**Author:** [@developer.mobilefirs](https://forum.flow.com/u/developer.mobilefirs)\ **Replies:** 0\ **Last updated:** [October 11, 2022, 11:06am UTC](https://forum.flow.com/t/computation-limited-exceeded/3707 "2022-10-11T11:06:52Z")
I am getting computation limit exceeded and not able to track what is the issue. I have also checked increasing the limit to 9999. Not sure how this calculation is made at the backend, but this is something which is very… --- ## [Read NFT Metadata from Wallet Connection](https://forum.flow.com/t/read-nft-metadata-from-wallet-connection/3589)
**Author:** [@Matt](https://forum.flow.com/u/Matt)\ **Replies:** 0\ **Last updated:** [September 19, 2022, 4:08pm UTC](https://forum.flow.com/t/read-nft-metadata-from-wallet-connection/3589 "2022-09-19T16:08:58Z")
Hey Flow community! I am just about a week into exploring the Flow blockchain, trying to build super basic application to connect to wallet and list the metadata from the NFTs contained within connected wallet. I manage… --- ## [431 error in Dapper wallet login](https://forum.flow.com/t/431-error-in-dapper-wallet-login/3546)
**Author:** [@FOGGYOON](https://forum.flow.com/u/FOGGYOON)\ **Replies:** 0\ **Last updated:** [August 31, 2022, 6:37pm UTC](https://forum.flow.com/t/431-error-in-dapper-wallet-login/3546 "2022-08-31T18:37:36Z")
Hi :slight\_smile: When I tried to login Dapper wallet. I got 431 error. Here is the dapper wallet config. config().put(‘discovery.wallet’, ‘https://staging.accounts.meetdapper.com/fcl/authn-restricted’); config().put… --- ## [HTTP Request Error: An error occurred when interacting with the Access API](https://forum.flow.com/t/http-request-error-an-error-occurred-when-interacting-with-the-access-api/3483)
**Author:** [@shanmugam](https://forum.flow.com/u/shanmugam)\ **Replies:** 1\ **Last updated:** [August 12, 2022, 3:58pm UTC](https://forum.flow.com/t/http-request-error-an-error-occurred-when-interacting-with-the-access-api/3483 "2022-08-12T15:58:54Z")
I would like to report an issue I am currently facing when trying to get the event on the testnet within the backend server, HTTPRequestError \[HTTP Request Error\]: 0|bab api | HTTP Request Error: An error occurr… --- ## [Transaction arguments are invalid](https://forum.flow.com/t/transaction-arguments-are-invalid/3304)
**Author:** [@e11](https://forum.flow.com/u/e11)\ **Replies:** 2\ **Last updated:** [June 25, 2022, 5:40pm UTC](https://forum.flow.com/t/transaction-arguments-are-invalid/3304 "2022-06-25T17:40:28Z")
Hi. I am developing an nft mint. I deployed my contracts to testnet. I created my NFT on Playground. But i tried with react / onflow that error occured: invalid argument at index 6: decodeing argument failed: \[Error … --- ## [Auto login for Authentication](https://forum.flow.com/t/auto-login-for-authentication/3201)
**Author:** [@savebo](https://forum.flow.com/u/savebo)\ **Replies:** 0\ **Last updated:** [June 8, 2022, 4:59am UTC](https://forum.flow.com/t/auto-login-for-authentication/3201 "2022-06-08T04:59:08Z")
Hello, I am using the Flow FCL with blocto wallet to log into the blockchain but I have noticed something weird in the authentication process. At the moment, let’s say user A logs into his account on the device, does s… --- ## [Cannot check account freeze status error](https://forum.flow.com/t/cannot-check-account-freeze-status-error/3191)
**Author:** [@ben2524](https://forum.flow.com/u/ben2524)\ **Replies:** 0\ **Last updated:** [June 3, 2022, 11:26pm UTC](https://forum.flow.com/t/cannot-check-account-freeze-status-error/3191 "2022-06-03T23:26:01Z")
Hi, I’m trying to follow along with rrrken’s topshot sales article below but have gotten stuck. https://medium.com/@eric.ren\_51534/polling-nba-top-shot-p2p-market-purchase-events-from-flow-blockchain-using-flow-go-sdk-… --- ## [Flow Cli did not upgrated v0.34.x](https://forum.flow.com/t/flow-cli-did-not-upgrated-v0-34-x/3138)
**Author:** [@e11](https://forum.flow.com/u/e11)\ **Replies:** 4\ **Last updated:** [June 1, 2022, 7:13am UTC](https://forum.flow.com/t/flow-cli-did-not-upgrated-v0-34-x/3138 "2022-06-01T07:13:42Z")
Hi. I installed flow cli for windows and then terminal warns me the flow cli has a new version please upgrade. I want to upgrade but there is nothing. My system flow cli is v0.33.x I guess windows platform is not work… --- ## [How to count items minted](https://forum.flow.com/t/how-to-count-items-minted/3174)
**Author:** [@veerdev](https://forum.flow.com/u/veerdev)\ **Replies:** 2\ **Last updated:** [May 30, 2022, 7:13pm UTC](https://forum.flow.com/t/how-to-count-items-minted/3174 "2022-05-30T19:13:51Z")
How do we count the number of times a item is minted? can we query it. I dont have an function on my contract to this, is there is a way to query it. my minting function looks like below, recipient.deposit(token: \<-cr… --- ## [Alchemy is not work for goSDK](https://forum.flow.com/t/alchemy-is-not-work-for-gosdk/3100)
**Author:** [@skyone](https://forum.flow.com/u/skyone)\ **Replies:** 1\ **Last updated:** [May 11, 2022, 5:26am UTC](https://forum.flow.com/t/alchemy-is-not-work-for-gosdk/3100 "2022-05-11T05:26:29Z")
i try to use alchemy rpc to send tx or get tx. but, maybe it need grpc.WithTransportCredentials? or need something else except the docs said alchemy docs is not make sense… how could i init flowclient? https://doc… --- ## [FlowAccessApi for testnet not working properly](https://forum.flow.com/t/flowaccessapi-for-testnet-not-working-properly/3017)
**Author:** [@sandeep](https://forum.flow.com/u/sandeep)\ **Replies:** 1\ **Last updated:** [May 9, 2022, 5:07pm UTC](https://forum.flow.com/t/flowaccessapi-for-testnet-not-working-properly/3017 "2022-05-09T17:07:56Z")
I’ve submitted my transaction on Testnet and got the transaction id successfully. But even after 15 minutes transaction result is showing as pending while on flow-view-source it shows that transaction is executed. I am … --- ## [NBA TopShot Chain/Account Information](https://forum.flow.com/t/nba-topshot-chain-account-information/1558)
**Author:** [@Deetow](https://forum.flow.com/u/Deetow)\ **Replies:** 5\ **Last updated:** [April 30, 2022, 6:39pm UTC](https://forum.flow.com/t/nba-topshot-chain-account-information/1558 "2022-04-30T18:39:03Z")
Hi, I was wondering how we can correlate account addresses stored on chain with NBA Top Shot usernames. It would be nice to have a human readable format for seller/buyer in transactions, and it seems like other sites ar… --- ## [Get NBA Tops Account & Moments via SDK or API?](https://forum.flow.com/t/get-nba-tops-account-moments-via-sdk-or-api/3063)
**Author:** [@laf](https://forum.flow.com/u/laf)\ **Replies:** 0\ **Last updated:** [April 30, 2022, 1:49am UTC](https://forum.flow.com/t/get-nba-tops-account-moments-via-sdk-or-api/3063 "2022-04-30T01:49:24Z")
From what I understand, I can currently use FCL to query the Tops Marketplace but how do I even find the NFT ID from a moment I already purchased? I saw the GraphQL API (TopShot Marketplace API) but like, what is the v… --- ## [Error: code = Unavailable desc = upstream connect error or disconnect/reset before headers. reset reason: overflow](https://forum.flow.com/t/error-code-unavailable-desc-upstream-connect-error-or-disconnect-reset-before-headers-reset-reason-overflow/3012)
**Author:** [@dh77](https://forum.flow.com/u/dh77)\ **Replies:** 0\ **Last updated:** [April 10, 2022, 5:34pm UTC](https://forum.flow.com/t/error-code-unavailable-desc-upstream-connect-error-or-disconnect-reset-before-headers-reset-reason-overflow/3012 "2022-04-10T17:34:45Z")
Hey everyone, are there currently any issues with the Testnet? The status is “healthy” I just got this error twice while trying to execute my transaction (it never happened before in the previous months): Waiting for … [Next page](https://forum.flow.com/c/flow-sdks/8.md?page=1)