# Developer Discussion **URL:** https://community.fireblocks.com/c/discuss/4.md [Latest](https://community.fireblocks.com/latest.md) · [Categories](https://community.fireblocks.com/categories.md) · [Tags](https://community.fireblocks.com/tags.md) --- ## [About the Developer Discussion category](https://community.fireblocks.com/t/about-the-developer-discussion-category/3)
**Author:** [@system](https://community.fireblocks.com/u/system)\ **Replies:** 0\ **Last updated:** [December 6, 2022, 10:22am UTC](https://community.fireblocks.com/t/about-the-developer-discussion-category/3 "2022-12-06T10:22:35Z")
Dev community questions and discussion relating to what you’re building using Fireblocks. Want advice on how to build your next project? Share and discuss tips with other Fireblocks users here. --- ## [How to add users in console](https://community.fireblocks.com/t/how-to-add-users-in-console/1539)
**Author:** [@Vinay](https://community.fireblocks.com/u/Vinay)\ **Replies:** 4\ **Last updated:** [September 9, 2026, 11:29pm UTC](https://community.fireblocks.com/t/how-to-add-users-in-console/1539 "2026-09-09T23:29:39Z")
How to add users other than owner. --- ## [How to get workspace\_id?](https://community.fireblocks.com/t/how-to-get-workspace-id/3197)
**Author:** [@karlosmid-ioent](https://community.fireblocks.com/u/karlosmid-ioent)\ **Replies:** 1\ **Last updated:** [August 27, 2026, 2:59pm UTC](https://community.fireblocks.com/t/how-to-get-workspace-id/3197 "2026-08-27T14:59:14Z")
Support request — GET /v1/workspace returns 403 with an empty body Subject: GET /v1/workspace returns HTTP 403 with an empty body — which API user role is required, and is the workspaceId in a webhook envelope the same i… --- ## [Way to fetch vault id by wallet address?](https://community.fireblocks.com/t/way-to-fetch-vault-id-by-wallet-address/3181)
**Author:** [@sundonategg](https://community.fireblocks.com/u/sundonategg)\ **Replies:** 1\ **Last updated:** [August 26, 2026, 9:12pm UTC](https://community.fireblocks.com/t/way-to-fetch-vault-id-by-wallet-address/3181 "2026-08-26T21:12:18Z")
Is there a way to fetch vault id just by a given wallet address? --- ## [I can't acess the Fireblocks academy](https://community.fireblocks.com/t/i-cant-acess-the-fireblocks-academy/2292)
**Author:** [@Vinikra](https://community.fireblocks.com/u/Vinikra)\ **Replies:** 5\ **Last updated:** [August 26, 2026, 6:58pm UTC](https://community.fireblocks.com/t/i-cant-acess-the-fireblocks-academy/2292 "2026-08-26T18:58:26Z")
I’m tryin to acess but the email confirmation don’t arrive --- ## [Sandbox access request: authorization policy rules in sandbox](https://community.fireblocks.com/t/sandbox-access-request-authorization-policy-rules-in-sandbox/3183)
**Author:** [@lamkeo](https://community.fireblocks.com/u/lamkeo)\ **Replies:** 0\ **Last updated:** [July 15, 2026, 1:08am UTC](https://community.fireblocks.com/t/sandbox-access-request-authorization-policy-rules-in-sandbox/3183 "2026-07-15T01:08:32Z")
Hello, I need to be able to add and modify transaction authorization policy rules in my sandbox. I would like to create a Fireblocks Policy for the Gas Station ERC20 Fee Wallet, but my users are unable to create it. Co… --- ## [Migration from Fireblock webhook V1 -\> V2](https://community.fireblocks.com/t/migration-from-fireblock-webhook-v1-v2/3149)
**Author:** [@Raghavendra](https://community.fireblocks.com/u/Raghavendra)\ **Replies:** 0\ **Last updated:** [May 11, 2026, 7:58am UTC](https://community.fireblocks.com/t/migration-from-fireblock-webhook-v1-v2/3149 "2026-05-11T07:58:20Z")
As per the updates for the upcoming Fireblocks V2 release (June 2026), webhook responses are expected to change, including event naming (e.g., TRANSACTION\_CREATED → transaction.created). However, these updates are not re… --- ## [Fireblocks Testnet – Limited Asset Support Issue (BTC\_TEST & USDC\_NOBLE\_TEST only)](https://community.fireblocks.com/t/fireblocks-testnet-limited-asset-support-issue-btc-test-usdc-noble-test-only/3122)
**Author:** [@thiruaxora](https://community.fireblocks.com/u/thiruaxora)\ **Replies:** 1\ **Last updated:** [April 30, 2026, 9:33am UTC](https://community.fireblocks.com/t/fireblocks-testnet-limited-asset-support-issue-btc-test-usdc-noble-test-only/3122 "2026-04-30T09:33:13Z")
Hi everyone, We’re currently integrating with Fireblocks testnet environment and running into a limitation that we’re unable to resolve. Issue Summary In our testnet workspace, only the following assets are working: B… --- ## [Subject: Sandbox co-signer offline since March 2nd — API user disabled (403/1010)](https://community.fireblocks.com/t/subject-sandbox-co-signer-offline-since-march-2nd-api-user-disabled-403-1010/3123)
**Author:** [@HLB](https://community.fireblocks.com/u/HLB)\ **Replies:** 1\ **Last updated:** [April 19, 2026, 2:01pm UTC](https://community.fireblocks.com/t/subject-sandbox-co-signer-offline-since-march-2nd-api-user-disabled-403-1010/3123 "2026-04-19T14:01:51Z")
Hi Fireblocks Support, Our sandbox co-signer (ID: a33622be44) has been offline since March 2nd, 2026. As a result, our API user appears to have been automatically disabled, and all API requests now return 403 with Cloud… --- ## [How Can i get log from fireblocks to qradar with webhook](https://community.fireblocks.com/t/how-can-i-get-log-from-fireblocks-to-qradar-with-webhook/3134)
**Author:** [@gunay.karabulut](https://community.fireblocks.com/u/gunay.karabulut)\ **Replies:** 0\ **Last updated:** [April 13, 2026, 9:19am UTC](https://community.fireblocks.com/t/how-can-i-get-log-from-fireblocks-to-qradar-with-webhook/3134 "2026-04-13T09:19:00Z")
Is there any guide for this topic please send me --- ## [General Fees on trading API](https://community.fireblocks.com/t/general-fees-on-trading-api/3120)
**Author:** [@george.monroyo](https://community.fireblocks.com/u/george.monroyo)\ **Replies:** 0\ **Last updated:** [March 17, 2026, 4:30pm UTC](https://community.fireblocks.com/t/general-fees-on-trading-api/3120 "2026-03-17T16:30:44Z")
Hi, is the general fees already deducted on the quote amount? or it will be deducted later? I know that network fees will be deducted to the wallet giving 0.1 + 0.000238609003101917 deduction to my ETH\_TEST5 wallet. how… --- ## [New Account - dual authentication fail](https://community.fireblocks.com/t/new-account-dual-authentication-fail/3091)
**Author:** [@Investment.Defi](https://community.fireblocks.com/u/Investment.Defi)\ **Replies:** 5\ **Last updated:** [February 20, 2026, 2:35pm UTC](https://community.fireblocks.com/t/new-account-dual-authentication-fail/3091 "2026-02-20T14:35:09Z")
Hello, I’m new, trying to connect first time to the sandbox. Login fail after dual authentication. What should I do ? Thanks --- ## [How can I connect a Solana staking dApp to Fireblocks Sandbox via WalletConnect and sign transactions?](https://community.fireblocks.com/t/how-can-i-connect-a-solana-staking-dapp-to-fireblocks-sandbox-via-walletconnect-and-sign-transactions/1139)
**Author:** [@bearfly](https://community.fireblocks.com/u/bearfly)\ **Replies:** 5\ **Last updated:** [January 30, 2026, 12:04am UTC](https://community.fireblocks.com/t/how-can-i-connect-a-solana-staking-dapp-to-fireblocks-sandbox-via-walletconnect-and-sign-transactions/1139 "2026-01-30T00:04:24Z")
At present, I am trying to connect to Fireblocks Sandbox via WalletConnect using the official demo address: https://react-app.walletconnect.com/. However, I am receiving an error message: ‘Fireblocks doesn’t support the … --- ## [Dev IP whitelisting on Sandbox](https://community.fireblocks.com/t/dev-ip-whitelisting-on-sandbox/3087)
**Author:** [@ayanda.luthuli](https://community.fireblocks.com/u/ayanda.luthuli)\ **Replies:** 0\ **Last updated:** [January 29, 2026, 9:51am UTC](https://community.fireblocks.com/t/dev-ip-whitelisting-on-sandbox/3087 "2026-01-29T09:51:08Z")
I want my dev box IP whitelisted. I am the only user of my workspace but I do not have rights to add the IP. --- ## [Not able to recover 2fa on my new device](https://community.fireblocks.com/t/not-able-to-recover-2fa-on-my-new-device/3064)
**Author:** [@danymar](https://community.fireblocks.com/u/danymar)\ **Replies:** 1\ **Last updated:** [January 6, 2026, 12:55pm UTC](https://community.fireblocks.com/t/not-able-to-recover-2fa-on-my-new-device/3064 "2026-01-06T12:55:14Z")
Hi, can you please reset the 2fa for my account d.marinelli@dtsh.io to access the console? thank you in advance Daniele --- ## [Missing counter transaction when sending tx to self](https://community.fireblocks.com/t/missing-counter-transaction-when-sending-tx-to-self/1076)
**Author:** [@pavel.niedoba](https://community.fireblocks.com/u/pavel.niedoba)\ **Replies:** 6\ **Last updated:** [January 5, 2026, 1:53pm UTC](https://community.fireblocks.com/t/missing-counter-transaction-when-sending-tx-to-self/1076 "2026-01-05T13:53:37Z")
In special use case API is not returning counter transaction which is expected to show. I need to know if this is bug o feature. have a VAULT with BTC asset and some balance. list VAULT:BTC addresses and take one ADDRE… --- ## [OpenAPI 3.0 version for Webhook v2](https://community.fireblocks.com/t/openapi-3-0-version-for-webhook-v2/3063)
**Author:** [@stealash](https://community.fireblocks.com/u/stealash)\ **Replies:** 0\ **Last updated:** [January 5, 2026, 5:00am UTC](https://community.fireblocks.com/t/openapi-3-0-version-for-webhook-v2/3063 "2026-01-05T05:00:06Z")
Good morning! Where can I download the OpenAPI 3.0 (Swagger) specification for Webhook v2? I tried downloading it from the REST API Guide page, but the link points to version 1.6.2. I also tried using version 1.6.2, ho… --- ## [Sandbox renewal for dev:](https://community.fireblocks.com/t/sandbox-renewal-for-dev/3062)
**Author:** [@Hannay](https://community.fireblocks.com/u/Hannay)\ **Replies:** 0\ **Last updated:** [December 31, 2025, 2:40pm UTC](https://community.fireblocks.com/t/sandbox-renewal-for-dev/3062 "2025-12-31T14:40:26Z")
Hi, please could you extend my sandbox session, thanks. frankreeves@klaros.co.uk --- ## [Damaged my phone tied to 2FA for my sandbox](https://community.fireblocks.com/t/damaged-my-phone-tied-to-2fa-for-my-sandbox/3058)
**Author:** [@jaijiv](https://community.fireblocks.com/u/jaijiv)\ **Replies:** 1\ **Last updated:** [December 29, 2025, 1:19am UTC](https://community.fireblocks.com/t/damaged-my-phone-tied-to-2fa-for-my-sandbox/3058 "2025-12-29T01:19:56Z")
hi, i damaged my phone connected to 2FA for my sandbox env - can u please reset jaijiv.prabhakaran@morganstanley.com --- ## [MPC signing failed for Embedded Wallets (NCW) sandbox environment](https://community.fireblocks.com/t/mpc-signing-failed-for-embedded-wallets-ncw-sandbox-environment/3050)
**Author:** [@jon](https://community.fireblocks.com/u/jon)\ **Replies:** 0\ **Last updated:** [December 19, 2025, 1:04pm UTC](https://community.fireblocks.com/t/mpc-signing-failed-for-embedded-wallets-ncw-sandbox-environment/3050 "2025-12-19T13:04:02Z")
I’m integrating Embedded Wallets. Things is working fine so far and I could generate mpc keys and sign transactions. But suddenly it stops working since yesterday and I could not sign transaction anymore. I updated the… --- ## [Request for sandbox access extension](https://community.fireblocks.com/t/request-for-sandbox-access-extension/3043)
**Author:** [@Keerthana](https://community.fireblocks.com/u/Keerthana)\ **Replies:** 0\ **Last updated:** [December 16, 2025, 6:36am UTC](https://community.fireblocks.com/t/request-for-sandbox-access-extension/3043 "2025-12-16T06:36:31Z")
Hi, Request to extend Sandbox account for development work for the email ID kesarava@in.ibm.com . Thank you --- ## [Sandbox account not activate - upmount](https://community.fireblocks.com/t/sandbox-account-not-activate-upmount/3040)
**Author:** [@upmount](https://community.fireblocks.com/u/upmount)\ **Replies:** 0\ **Last updated:** [December 15, 2025, 4:41am UTC](https://community.fireblocks.com/t/sandbox-account-not-activate-upmount/3040 "2025-12-15T04:41:51Z")
The sandbox account created with dev@upmount.co.kr is not activated. I’ve also completed 2FA setup. --- ## [Can't login on sandbox](https://community.fireblocks.com/t/cant-login-on-sandbox/3034)
**Author:** [@feynman](https://community.fireblocks.com/u/feynman)\ **Replies:** 0\ **Last updated:** [December 5, 2025, 7:11am UTC](https://community.fireblocks.com/t/cant-login-on-sandbox/3034 "2025-12-05T07:11:56Z")
I’m currently unable to log in to my account, and I’m also not receiving the password reset link on my registered email ID. As a result, I’m unable to reset my password or regain access. I am working on the sandbox envi… --- ## [Unfreeze Fireblocks Sandbox Workspace and Arc Testnet](https://community.fireblocks.com/t/unfreeze-fireblocks-sandbox-workspace-and-arc-testnet/3033)
**Author:** [@Hannay](https://community.fireblocks.com/u/Hannay)\ **Replies:** 0\ **Last updated:** [December 5, 2025, 6:15am UTC](https://community.fireblocks.com/t/unfreeze-fireblocks-sandbox-workspace-and-arc-testnet/3033 "2025-12-05T06:15:37Z")
I need access to the Fireblocks sandbox to continue dev of a digital trade settlement platform - it expired before I was able to fully integrate it. My workspace is Klaros Ltd, under Frank Reeves. Grateful if I could hav… --- ## [Arc Testnet as a supported/custom EVM network](https://community.fireblocks.com/t/arc-testnet-as-a-supported-custom-evm-network/3032)
**Author:** [@Hannay](https://community.fireblocks.com/u/Hannay)\ **Replies:** 0\ **Last updated:** [December 2, 2025, 9:47pm UTC](https://community.fireblocks.com/t/arc-testnet-as-a-supported-custom-evm-network/3032 "2025-12-02T21:47:53Z")
Could you please advise whether you can enable Arc Testnet a supported/custom EVM network in my Sandbox? Network details: Arc Testnet Type: EVM testnet Chain ID: 5042002 RPC URL: https://rpc.testnet.arc.network Native… --- ## [Fireblocks Java SDK: WriteCallFunction api input is not working with array types](https://community.fireblocks.com/t/fireblocks-java-sdk-writecallfunction-api-input-is-not-working-with-array-types/2616)
**Author:** [@sangnh99](https://community.fireblocks.com/u/sangnh99)\ **Replies:** 8\ **Last updated:** [December 1, 2025, 1:25pm UTC](https://community.fireblocks.com/t/fireblocks-java-sdk-writecallfunction-api-input-is-not-working-with-array-types/2616 "2025-12-01T13:25:55Z")
I’m using the Fireblocks Java SDK (version 10.4.0), I’m having trouble executing write functions where the input is an array type (uint256\[\]) using the writeCallFunction API. For example, i have a simple contract with t… --- ## [401 Unauthorized - "Error creating public key from user certificate" (code -7) on sandbox](https://community.fireblocks.com/t/401-unauthorized-error-creating-public-key-from-user-certificate-code-7-on-sandbox/3023)
**Author:** [@DavidSwapped](https://community.fireblocks.com/u/DavidSwapped)\ **Replies:** 0\ **Last updated:** [November 26, 2025, 9:52am UTC](https://community.fireblocks.com/t/401-unauthorized-error-creating-public-key-from-user-certificate-code-7-on-sandbox/3023 "2025-11-26T09:52:03Z")
Getting this error when calling POST /v1/transactions on sandbox: { "message": "Unauthorized: Error creating public key from user certificate", "code": -7 } Setup: Can anyone help why this is happening? Nothing changed… --- ## [Clarification on Wallet Capabilities and API Documentation in Fireblocks Essentials Plan](https://community.fireblocks.com/t/clarification-on-wallet-capabilities-and-api-documentation-in-fireblocks-essentials-plan/3021)
**Author:** [@harshala\_supesa](https://community.fireblocks.com/u/harshala_supesa)\ **Replies:** 0\ **Last updated:** [November 24, 2025, 2:53pm UTC](https://community.fireblocks.com/t/clarification-on-wallet-capabilities-and-api-documentation-in-fireblocks-essentials-plan/3021 "2025-11-24T14:53:22Z")
Under the Fireblocks “Essentials” plan, which wallet types are supported? Also, is any configuration required on our side before we can create wallets on production? Please share the API documentation and the key-store … --- ## [Unable to Login or Reset Password for my sandbox account](https://community.fireblocks.com/t/unable-to-login-or-reset-password-for-my-sandbox-account/3015)
**Author:** [@harshala\_supesa](https://community.fireblocks.com/u/harshala_supesa)\ **Replies:** 1\ **Last updated:** [November 18, 2025, 3:14am UTC](https://community.fireblocks.com/t/unable-to-login-or-reset-password-for-my-sandbox-account/3015 "2025-11-18T03:14:35Z")
I’m currently unable to log in to my account, and I’m also not receiving the password reset link on my registered email ID. As a result, I’m unable to reset my password or regain access. I am working on the sandbox envi… --- ## [Cannot send BTC in Sandbox to anywhere](https://community.fireblocks.com/t/cannot-send-btc-in-sandbox-to-anywhere/3014)
**Author:** [@seokho](https://community.fireblocks.com/u/seokho)\ **Replies:** 3\ **Last updated:** [November 14, 2025, 8:46am UTC](https://community.fireblocks.com/t/cannot-send-btc-in-sandbox-to-anywhere/3014 "2025-11-14T08:46:23Z")
Hi, We’re testing to use the Fireblocks Sandbox workspace and cannot test ‘Transfer’ feature of BTC\_TEST. Balance: 0.00267208 BTC\_TEST Send amount: 0.0001 Error: Insufficient funds Why can’t I send that amount to any… [Next page](https://community.fireblocks.com/c/discuss/4.md?page=1)