# Developer Discussion **URL:** https://community.fireblocks.com/c/discuss/4.md?page=2 [Latest](https://community.fireblocks.com/latest.md) · [Categories](https://community.fireblocks.com/categories.md) · [Tags](https://community.fireblocks.com/tags.md) **Page:** 3 --- ## [I've Lost Access to Authenticator App](https://community.fireblocks.com/t/ive-lost-access-to-authenticator-app/2703)
**Author:** [@bilal4598](https://community.fireblocks.com/u/bilal4598)\ **Replies:** 3\ **Last updated:** [August 26, 2025, 3:42am UTC](https://community.fireblocks.com/t/ive-lost-access-to-authenticator-app/2703 "2025-08-26T03:42:27Z")
I’ve lost access to my authenticator app, and I cannot access it, I tried creating a ticket here: https://support.fireblocks.io/hc/en-us/requests/new?ticket\_form\_id=360003372200&tf\_360023089139=user\_operations&tf\_360023… --- ## [Bug in documentation](https://community.fireblocks.com/t/bug-in-documentation/2706)
**Author:** [@michaldo](https://community.fireblocks.com/u/michaldo)\ **Replies:** 2\ **Last updated:** [August 26, 2025, 3:07am UTC](https://community.fireblocks.com/t/bug-in-documentation/2706 "2025-08-26T03:07:36Z")
Hi, there is bug in webhook documentation Transaction events In documentation: transaction.approval.status.updated In real: transaction.approval\_status.updated --- ## [Binance Testnet](https://community.fireblocks.com/t/binance-testnet/2707)
**Author:** [@george.monroyo](https://community.fireblocks.com/u/george.monroyo)\ **Replies:** 0\ **Last updated:** [August 20, 2025, 4:23pm UTC](https://community.fireblocks.com/t/binance-testnet/2707 "2025-08-20T16:23:46Z")
I see that fireblocks is connected to binance exchange, but I am not seeing it in sandbox console. Is it available only on Mainnet? --- ## [Request for 2FA Reset](https://community.fireblocks.com/t/request-for-2fa-reset/2701)
**Author:** [@bilal](https://community.fireblocks.com/u/bilal)\ **Replies:** 0\ **Last updated:** [August 20, 2025, 3:47am UTC](https://community.fireblocks.com/t/request-for-2fa-reset/2701 "2025-08-20T03:47:26Z")
FireBlocks isn’t accepting my 2FA, and I’ve lost access to the app. Is there an alternative way to reset it? --- ## [Webhook V2 options not available in Sandbox + 403 error with TS-SDK](https://community.fireblocks.com/t/webhook-v2-options-not-available-in-sandbox-403-error-with-ts-sdk/2643)
**Author:** [@bilal](https://community.fireblocks.com/u/bilal)\ **Replies:** 4\ **Last updated:** [August 19, 2025, 5:30pm UTC](https://community.fireblocks.com/t/webhook-v2-options-not-available-in-sandbox-403-error-with-ts-sdk/2643 "2025-08-19T17:30:32Z")
Hi everyone, I’m working with the Fireblocks Sandbox environment, and trying to set up Webhook V2 using the TypeScript SDK. I’m logged in as a non-signing admin, and I can successfully use basic SDK operations like: co… --- ## [Fireblocks Sandbox not fetching latest block for Shasta TRON](https://community.fireblocks.com/t/fireblocks-sandbox-not-fetching-latest-block-for-shasta-tron/2657)
**Author:** [@Reno](https://community.fireblocks.com/u/Reno)\ **Replies:** 3\ **Last updated:** [August 7, 2025, 10:16am UTC](https://community.fireblocks.com/t/fireblocks-sandbox-not-fetching-latest-block-for-shasta-tron/2657 "2025-08-07T10:16:54Z")
Hi Fireblocks Team, I am facing an issue for fetching latest balance in TRON Shasta Network in Sandbox environment. Fetching latest balance for TRON in Fireblocks resulted : { id: ‘TRX\_TEST’, total: ‘49.8164’, bala… --- ## [Can Fireblocks people respond to the questions? Thx](https://community.fireblocks.com/t/can-fireblocks-people-respond-to-the-questions-thx/2655)
**Author:** [@patrice](https://community.fireblocks.com/u/patrice)\ **Replies:** 0\ **Last updated:** [August 6, 2025, 9:20am UTC](https://community.fireblocks.com/t/can-fireblocks-people-respond-to-the-questions-thx/2655 "2025-08-06T09:20:15Z")
I need Fireblocks to reply to my last question, thank you --- ## [Claiming Staking Rewards](https://community.fireblocks.com/t/claiming-staking-rewards/2653)
**Author:** [@Andy8](https://community.fireblocks.com/u/Andy8)\ **Replies:** 0\ **Last updated:** [August 5, 2025, 2:36pm UTC](https://community.fireblocks.com/t/claiming-staking-rewards/2653 "2025-08-05T14:36:15Z")
I’m having trouble finding clear documentation on how Fireblocks handles staking with Kiln, specifically on SOL\_TEST. From what I understand, there is an executeStakingClaimRewards method available in the SDK, but in pr… --- ## [Cannot link a contract from Ethereum Sepolia Testnet](https://community.fireblocks.com/t/cannot-link-a-contract-from-ethereum-sepolia-testnet/2645)
**Author:** [@Taimoor](https://community.fireblocks.com/u/Taimoor)\ **Replies:** 0\ **Last updated:** [August 1, 2025, 2:37pm UTC](https://community.fireblocks.com/t/cannot-link-a-contract-from-ethereum-sepolia-testnet/2645 "2025-08-01T14:37:18Z")
I am trying to link my own contract deployed on Ethereum Sepolia Testnet but I am getting: Contract does not exist or address is invalid, please try again. But I can see the contract on Sepolia Testnet. I deployed the … --- ## [Webhook Notifications Not Working & “Webhooks” Tab Missing in Partner Center](https://community.fireblocks.com/t/webhook-notifications-not-working-webhooks-tab-missing-in-partner-center/2623)
**Author:** [@o.rzazade](https://community.fireblocks.com/u/o.rzazade)\ **Replies:** 4\ **Last updated:** [July 29, 2025, 6:19pm UTC](https://community.fireblocks.com/t/webhook-notifications-not-working-webhooks-tab-missing-in-partner-center/2623 "2025-07-29T18:19:43Z")
Hello, I’m seeing two related issues in my Sandbox Partner Center: No webhook callbacks ever reach my endpoint when I trigger transactions in the sandbox. Overnight, the entire Webhooks configuration tab has disappear… --- ## [How can I correct this structure to make a call to a whitelisted contract?](https://community.fireblocks.com/t/how-can-i-correct-this-structure-to-make-a-call-to-a-whitelisted-contract/2634)
**Author:** [@Taimoor](https://community.fireblocks.com/u/Taimoor)\ **Replies:** 1\ **Last updated:** [July 28, 2025, 2:06pm UTC](https://community.fireblocks.com/t/how-can-i-correct-this-structure-to-make-a-call-to-a-whitelisted-contract/2634 "2025-07-28T14:06:44Z")
I have been trying to call the contract that is whitelisted in my Fireblocks portal but I get: { "message": "One or more destinations are invalid", "code": 1428 } This is my request structure, I have tried chan… --- ## [Getting Transaction Internal Error after calling contract data](https://community.fireblocks.com/t/getting-transaction-internal-error-after-calling-contract-data/2562)
**Author:** [@junmeng-t](https://community.fireblocks.com/u/junmeng-t)\ **Replies:** 1\ **Last updated:** [June 18, 2025, 3:01am UTC](https://community.fireblocks.com/t/getting-transaction-internal-error-after-calling-contract-data/2562 "2025-06-18T03:01:02Z")
Hi, When i invoke a contract function AMOY\_POLYGON\_TEST chain in Sandbox, I am getting Fireblocks Internal Error, does Sandbox environment supports contract call to AMOY\_POLYGON\_TEST chain? I don’t see any node status A… --- ## [How to deduct fees from a withdraw transaction and send to a specific user?](https://community.fireblocks.com/t/how-to-deduct-fees-from-a-withdraw-transaction-and-send-to-a-specific-user/2566)
**Author:** [@shubhamsharma0040](https://community.fireblocks.com/u/shubhamsharma0040)\ **Replies:** 1\ **Last updated:** [June 18, 2025, 1:42am UTC](https://community.fireblocks.com/t/how-to-deduct-fees-from-a-withdraw-transaction-and-send-to-a-specific-user/2566 "2025-06-18T01:42:30Z")
I am using Fireblocks in my platform, and need to deduct fees from users withdrawing their tokens from the Fireblocks wallet. Now, one way is to create 2 transactions, one in which fees are deducted and sent to the admi… --- ## [Webhooks Beta V2 Forbidden Access using Non-SIgning Admin Api Key](https://community.fireblocks.com/t/webhooks-beta-v2-forbidden-access-using-non-signing-admin-api-key/2553)
**Author:** [@drewjya](https://community.fireblocks.com/u/drewjya)\ **Replies:** 1\ **Last updated:** [June 17, 2025, 7:45am UTC](https://community.fireblocks.com/t/webhooks-beta-v2-forbidden-access-using-non-signing-admin-api-key/2553 "2025-06-17T07:45:04Z")
Based on the Fireblocks documentation (Webhooks v2), I understand that I can test webhooks via the dashboard or through the SDK. However, I cannot find the ‘test endpoint’ button on the dashboard. Additionally, when I at… --- ## [Wrong wallet balance](https://community.fireblocks.com/t/wrong-wallet-balance/2557)
**Author:** [@tkwan](https://community.fireblocks.com/u/tkwan)\ **Replies:** 3\ **Last updated:** [June 13, 2025, 11:37pm UTC](https://community.fireblocks.com/t/wrong-wallet-balance/2557 "2025-06-13T23:37:23Z")
My wallet balance show as 0, but in polygon scan is 0.1 POL . This is Polygon Amoy testnet. wallet address is 0x96cB9B09F746e59D4575Aa92Aa2D10C002E59514 https://amoy.polygonscan.com/address/0x96cB9B09F746e59D4575Aa9… --- ## [Issuing New Token via Java SDK Not Working](https://community.fireblocks.com/t/issuing-new-token-via-java-sdk-not-working/2483)
**Author:** [@Zoran](https://community.fireblocks.com/u/Zoran)\ **Replies:** 2\ **Last updated:** [June 12, 2025, 1:36pm UTC](https://community.fireblocks.com/t/issuing-new-token-via-java-sdk-not-working/2483 "2025-06-12T13:36:14Z")
I’m using the Fireblocks Java SDK (version 10.1.0) and most operations are working fine — I can list vault accounts, create wallets, etc., without any issues. However, I’m running into a problem when trying to issue a n… --- ## [Transfer With in Fireblocks](https://community.fireblocks.com/t/transfer-with-in-fireblocks/2540)
**Author:** [@Shiva](https://community.fireblocks.com/u/Shiva)\ **Replies:** 1\ **Last updated:** [June 11, 2025, 6:51pm UTC](https://community.fireblocks.com/t/transfer-with-in-fireblocks/2540 "2025-06-11T18:51:15Z")
Does Fireblocks has the option to send funds to other fireblock account avoiding the gas fee and other network delays. if yes how can i do so that i pass the receiver id , currency and the amount to send. --- ## [Deserialization Error When Retrieving ERC20 Token Contract Address, Java SDK 10.1.0](https://community.fireblocks.com/t/deserialization-error-when-retrieving-erc20-token-contract-address-java-sdk-10-1-0/2550)
**Author:** [@Zoran](https://community.fireblocks.com/u/Zoran)\ **Replies:** 0\ **Last updated:** [June 11, 2025, 2:51pm UTC](https://community.fireblocks.com/t/deserialization-error-when-retrieving-erc20-token-contract-address-java-sdk-10-1-0/2550 "2025-06-11T14:51:25Z")
Hi, I’m trying to perform a mint operation for the ETH\_TEST5 ERC20 token using the Fireblocks Java SDK (version 10.1.0). To do this, I first need to retrieve the token contract address from the Fireblocks API: Endpoint… --- ## [Understanding the webhook responses](https://community.fireblocks.com/t/understanding-the-webhook-responses/2529)
**Author:** [@Zoran](https://community.fireblocks.com/u/Zoran)\ **Replies:** 0\ **Last updated:** [June 6, 2025, 8:02pm UTC](https://community.fireblocks.com/t/understanding-the-webhook-responses/2529 "2025-06-06T20:02:09Z")
Hi everyone, I’m having some trouble understanding the webhook responses I get from the API when I make a token creation request. Besides the "status": "COMPLETED" field, I’m not really sure what the other fields mean o… --- ## [Fireblocks Java SDK 10.1.0: Deserialization Error When Retrieving ERC20 Token Contract Address](https://community.fireblocks.com/t/fireblocks-java-sdk-10-1-0-deserialization-error-when-retrieving-erc20-token-contract-address/2528)
**Author:** [@Zoran](https://community.fireblocks.com/u/Zoran)\ **Replies:** 0\ **Last updated:** [June 6, 2025, 7:38pm UTC](https://community.fireblocks.com/t/fireblocks-java-sdk-10-1-0-deserialization-error-when-retrieving-erc20-token-contract-address/2528 "2025-06-06T19:38:56Z")
Hi, I’m trying to perform a mint operation for the ETH\_TEST5 ERC20 token using the Fireblocks Java SDK (version 10.1.0). To do this, I first need to retrieve the token contract address from the Fireblocks API: Endpoint… --- ## [Understanding the webhook responses](https://community.fireblocks.com/t/understanding-the-webhook-responses/2527)
**Author:** [@Zoran](https://community.fireblocks.com/u/Zoran)\ **Replies:** 0\ **Last updated:** [June 6, 2025, 7:31pm UTC](https://community.fireblocks.com/t/understanding-the-webhook-responses/2527 "2025-06-06T19:31:19Z")
Hi everyone, I’m having some trouble understanding the webhook responses I get from the API when I make a token creation request. Besides the "status": "COMPLETED" field, I’m not really sure what the other fields mean o… --- ## [Validate Address method not working](https://community.fireblocks.com/t/validate-address-method-not-working/2456)
**Author:** [@pemaju02](https://community.fireblocks.com/u/pemaju02)\ **Replies:** 4\ **Last updated:** [May 26, 2025, 5:39am UTC](https://community.fireblocks.com/t/validate-address-method-not-working/2456 "2025-05-26T05:39:58Z")
We are using this method createVaultAsset for address generation, Address generation is fine, but generated address is valid or not to check using this method const validAddess = await fireblocks.validateAddress(currenc… --- ## [Fireblocks showing incorrect token balance after a failed transaction](https://community.fireblocks.com/t/fireblocks-showing-incorrect-token-balance-after-a-failed-transaction/2417)
**Author:** [@shubhamsharma0040](https://community.fireblocks.com/u/shubhamsharma0040)\ **Replies:** 7\ **Last updated:** [May 26, 2025, 4:20am UTC](https://community.fireblocks.com/t/fireblocks-showing-incorrect-token-balance-after-a-failed-transaction/2417 "2025-05-26T04:20:34Z")
I created a token, Alysa Abernathy (AA), on the Amoy testnet and registered it on Fireblocks. Now, I tried to transfer some tokens from one account to another, which failed due to a condition in the contract. But now, f… --- ## [Make a Custodial (Omnibus) Ecosystem](https://community.fireblocks.com/t/make-a-custodial-omnibus-ecosystem/2479)
**Author:** [@isaac](https://community.fireblocks.com/u/isaac)\ **Replies:** 1\ **Last updated:** [May 25, 2025, 6:56am UTC](https://community.fireblocks.com/t/make-a-custodial-omnibus-ecosystem/2479 "2025-05-25T06:56:25Z")
Hi, I’m looking for a way to use the Omnibus wallet model rather than the segregated approach. Is this a feature that works on all assets? And how does one get started on that? I’ve been digging through the docs and sti… --- ## [Trouble download certificate from fireblocks SDK](https://community.fireblocks.com/t/trouble-download-certificate-from-fireblocks-sdk/2487)
**Author:** [@kevinn888](https://community.fireblocks.com/u/kevinn888)\ **Replies:** 0\ **Last updated:** [May 24, 2025, 6:33am UTC](https://community.fireblocks.com/t/trouble-download-certificate-from-fireblocks-sdk/2487 "2025-05-24T06:33:10Z")
i got an error to download certificate to mobile app using react-native-ncw-sdk this is the message i got before invokeWalletRpc in backend service { “headers”: { “physicalDeviceId”: “ac0c8ee5-1c12-485a-8ef8-8091d63… --- ## [Co-signer callback handle is not working](https://community.fireblocks.com/t/co-signer-callback-handle-is-not-working/2467)
**Author:** [@ansab](https://community.fireblocks.com/u/ansab)\ **Replies:** 1\ **Last updated:** [May 21, 2025, 8:00am UTC](https://community.fireblocks.com/t/co-signer-callback-handle-is-not-working/2467 "2025-05-21T08:00:27Z")
i am trying to configure co-signer call back handle and it shows something went wrong , i used endpoint “https://3b29-2402-3a80-4493-b28b-83f-a20f-8b66-502b.ngrok-free.app/sign” and public key properly please help to … --- ## [Receiving "invalid signature" Error While Authenticating with Fireblocks Sandbox API](https://community.fireblocks.com/t/receiving-invalid-signature-error-while-authenticating-with-fireblocks-sandbox-api/2452)
**Author:** [@mit](https://community.fireblocks.com/u/mit)\ **Replies:** 1\ **Last updated:** [May 15, 2025, 7:04am UTC](https://community.fireblocks.com/t/receiving-invalid-signature-error-while-authenticating-with-fireblocks-sandbox-api/2452 "2025-05-15T07:04:55Z")
Hi everyone, I’m currently working on integrating with the Fireblocks Sandbox API, and I’m running into an issue during the authentication process. When I attempt to make a request, I consistently receive the following … --- ## [Forbidden Error when getting list of webhooks in sandbox](https://community.fireblocks.com/t/forbidden-error-when-getting-list-of-webhooks-in-sandbox/2412)
**Author:** [@george.monroyo](https://community.fireblocks.com/u/george.monroyo)\ **Replies:** 5\ **Last updated:** [May 10, 2025, 1:45pm UTC](https://community.fireblocks.com/t/forbidden-error-when-getting-list-of-webhooks-in-sandbox/2412 "2025-05-10T13:45:28Z")
I am trying to get list of webhooks using this endpoint \[Get\] /v1/webhooks I set the ff. headers: X-API-KEY Authorization But I am getting forbidden error. Is this endpoint available in sandbox? --- ## [Computing the $value of an asset balance using API](https://community.fireblocks.com/t/computing-the-value-of-an-asset-balance-using-api/2432)
**Author:** [@george.monroyo](https://community.fireblocks.com/u/george.monroyo)\ **Replies:** 1\ **Last updated:** [May 8, 2025, 8:26pm UTC](https://community.fireblocks.com/t/computing-the-value-of-an-asset-balance-using-api/2432 "2025-05-08T20:26:02Z")
What API end point can I call in order to compute the $ equivalent of an asset balance --- ## [No webhook notification from external to fireblocks in Sandbox](https://community.fireblocks.com/t/no-webhook-notification-from-external-to-fireblocks-in-sandbox/2416)
**Author:** [@george.monroyo](https://community.fireblocks.com/u/george.monroyo)\ **Replies:** 2\ **Last updated:** [May 7, 2025, 5:19pm UTC](https://community.fireblocks.com/t/no-webhook-notification-from-external-to-fireblocks-in-sandbox/2416 "2025-05-07T17:19:53Z")
I transfer from google faucet to fireblocks for ETH\_TEST. there is no notification sent to webhook [Previous page](https://community.fireblocks.com/c/discuss/4.md?page=1) [Next page](https://community.fireblocks.com/c/discuss/4.md?page=3)