# \#getting-started **URL:** https://community.fireblocks.com/tag/getting-started/3.md [Latest](https://community.fireblocks.com/latest.md) · [Categories](https://community.fireblocks.com/categories.md) · [Tags](https://community.fireblocks.com/tags.md) --- ## [Unable to complete Developer Sandbox registration invitation link error](https://community.fireblocks.com/t/unable-to-complete-developer-sandbox-registration-invitation-link-error/3217)
**Author:** [@CheeryMeadow29](https://community.fireblocks.com/u/CheeryMeadow29)\ **Replies:** 0\ **Last updated:** [September 18, 2026, 9:28am UTC](https://community.fireblocks.com/t/unable-to-complete-developer-sandbox-registration-invitation-link-error/3217 "2026-09-18T09:28:55Z")
I received a link to join sandbox (I have submitted my info and got acceptance mail), but the link was probably expired (as I’m not sure If I clicked the link, I remember as I did but didn’t put a password or anything at… --- ## [Developer Sandbox invite email not received after accepting license agreement](https://community.fireblocks.com/t/developer-sandbox-invite-email-not-received-after-accepting-license-agreement/3154)
**Author:** [@havanbien](https://community.fireblocks.com/u/havanbien)\ **Replies:** 1\ **Last updated:** [September 15, 2026, 8:32am UTC](https://community.fireblocks.com/t/developer-sandbox-invite-email-not-received-after-accepting-license-agreement/3154 "2026-09-15T08:32:59Z")
Hi Fireblocks team, I registered from here for the Developer Sandbox and accepted the Testnet Workspace License Agreement, but I have not received the Sandbox invite link. I can access community, but login to Sandbox f… --- ## [Can't Proceed Past Fireblocks Developer Sandbox Agreement](https://community.fireblocks.com/t/cant-proceed-past-fireblocks-developer-sandbox-agreement/3214)
**Author:** [@sakura-finance](https://community.fireblocks.com/u/sakura-finance)\ **Replies:** 0\ **Last updated:** [September 15, 2026, 8:32am UTC](https://community.fireblocks.com/t/cant-proceed-past-fireblocks-developer-sandbox-agreement/3214 "2026-09-15T08:32:10Z")
Once I get to the agreement, I scroll to the bottom and click submit. Then it says: Thank you for accepting the Fireblocks Testnet Workspace License Agreement! You should receive a link to your Developer Sandbox via em… --- ## [Can't login fireblocks Sandbox : Workspace IP allowlist locked out](https://community.fireblocks.com/t/cant-login-fireblocks-sandbox-workspace-ip-allowlist-locked-out/3169)
**Author:** [@bulapu](https://community.fireblocks.com/u/bulapu)\ **Replies:** 1\ **Last updated:** [June 22, 2026, 3:39am UTC](https://community.fireblocks.com/t/cant-login-fireblocks-sandbox-workspace-ip-allowlist-locked-out/3169 "2026-06-22T03:39:34Z")
Hi, I’m unable to access my Fireblocks sandbox account. Could you please help me regain access? Workspace: Ripple - Bhavya Ulapu Email: bulapu@ripple.com --- ## [Unable to log into Sandbox — 2FA not working](https://community.fireblocks.com/t/unable-to-log-into-sandbox-2fa-not-working/3165)
**Author:** [@bulapu](https://community.fireblocks.com/u/bulapu)\ **Replies:** 0\ **Last updated:** [June 8, 2026, 4:49pm UTC](https://community.fireblocks.com/t/unable-to-log-into-sandbox-2fa-not-working/3165 "2026-06-08T16:49:56Z")
I recently created a Fireblocks Developer Sandbox account and scanned the QR code to set up 2FA, but I’m getting “Something went wrong” every time I enter the 6-digit code from my authenticator app. I’m unable to log in.… --- ## [Sandbox Webhook Retries Not Triggering on "No Response"](https://community.fireblocks.com/t/sandbox-webhook-retries-not-triggering-on-no-response/3090)
**Author:** [@wasantha](https://community.fireblocks.com/u/wasantha)\ **Replies:** 0\ **Last updated:** [February 6, 2026, 7:32am UTC](https://community.fireblocks.com/t/sandbox-webhook-retries-not-triggering-on-no-response/3090 "2026-02-06T07:32:18Z")
I am currently testing our integration in the Sandbox environment and am encountering an issue where webhook notification retries are not triggering as expected. The Scenario: According to the Fireblocks documentation, … --- ## [Sandbox connection to solana dapp from WalletConnect modal](https://community.fireblocks.com/t/sandbox-connection-to-solana-dapp-from-walletconnect-modal/843)
**Author:** [@mikhail](https://community.fireblocks.com/u/mikhail)\ **Replies:** 4\ **Last updated:** [January 30, 2026, 12:05am UTC](https://community.fireblocks.com/t/sandbox-connection-to-solana-dapp-from-walletconnect-modal/843 "2026-01-30T00:05:23Z")
So recently Fireblocks tech support has enabled “web3 integration for WalletConnect” for our Sandbox (thanks guys). Now I’m trying to connect solana dapp to the Sandbox on solana devnet chain (solana:EtWTRABZaYq6iMfeYKo… --- ## [Fireblocks V2 signature validation on PHP](https://community.fireblocks.com/t/fireblocks-v2-signature-validation-on-php/3083)
**Author:** [@ssj4maiko](https://community.fireblocks.com/u/ssj4maiko)\ **Replies:** 0\ **Last updated:** [January 21, 2026, 7:39pm UTC](https://community.fireblocks.com/t/fireblocks-v2-signature-validation-on-php/3083 "2026-01-21T19:39:02Z")
I was previously helped by a post here to get Fireblocks signature validation on PHP, so with V2 coming, I had to get it work by myself now, took some time until I got it to work fully, use Firebase\\JWT\\JWT; use Firebas… --- ## [Not receiving link to Developer Sandbox](https://community.fireblocks.com/t/not-receiving-link-to-developer-sandbox/3055)
**Author:** [@Mikail](https://community.fireblocks.com/u/Mikail)\ **Replies:** 0\ **Last updated:** [December 21, 2025, 11:26pm UTC](https://community.fireblocks.com/t/not-receiving-link-to-developer-sandbox/3055 "2025-12-21T23:26:55Z")
I have tried with 3 different business emails but I am unable to obtain access to the Developer Sandbox. After submitting the form to get access to the Sandbox, I receive an email with the subject “Action required: Your… --- ## [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… --- ## [Request for Testnet Account and Guidance on Required Production Settings](https://community.fireblocks.com/t/request-for-testnet-account-and-guidance-on-required-production-settings/2990)
**Author:** [@dung.nguyen.trung](https://community.fireblocks.com/u/dung.nguyen.trung)\ **Replies:** 1\ **Last updated:** [October 22, 2025, 6:39am UTC](https://community.fireblocks.com/t/request-for-testnet-account-and-guidance-on-required-production-settings/2990 "2025-10-22T06:39:09Z")
Hi Fireblocks team :waving\_hand:, I’ve been testing my integration successfully on the Fireblocks Sandbox environment, and everything is working as expected. In my sandbox setup: I created separate vaults for each n… --- ## [Fiat off-ramp solution for bulk payouts to multiple recipients](https://community.fireblocks.com/t/fiat-off-ramp-solution-for-bulk-payouts-to-multiple-recipients/2975)
**Author:** [@Anton](https://community.fireblocks.com/u/Anton)\ **Replies:** 0\ **Last updated:** [October 3, 2025, 12:36pm UTC](https://community.fireblocks.com/t/fiat-off-ramp-solution-for-bulk-payouts-to-multiple-recipients/2975 "2025-10-03T12:36:55Z")
Hi FireBlocks Community, We’re building a payment platform that needs to convert USDC from FireBlocks custody to USD and send payments to hundreds of individual bank accounts (third-party beneficiaries). Requirements: … --- ## [Help with correct sequence for real estate tokenization](https://community.fireblocks.com/t/help-with-correct-sequence-for-real-estate-tokenization/2847)
**Author:** [@basit](https://community.fireblocks.com/u/basit)\ **Replies:** 0\ **Last updated:** [August 29, 2025, 11:38am UTC](https://community.fireblocks.com/t/help-with-correct-sequence-for-real-estate-tokenization/2847 "2025-08-29T11:38:40Z")
hey everyone I am new here testing the sandbox and I hit a bump on the road. I am building a MVP to fractionalize real estate into ERC20F tokens, I want to confirm the correct sequence for tokenization and contract inte… --- ## [Can not change 'configure callback handler url' on fireblocks sandbox](https://community.fireblocks.com/t/can-not-change-configure-callback-handler-url-on-fireblocks-sandbox/2713)
**Author:** [@nathan](https://community.fireblocks.com/u/nathan)\ **Replies:** 2\ **Last updated:** [August 25, 2025, 9:35am UTC](https://community.fireblocks.com/t/can-not-change-configure-callback-handler-url-on-fireblocks-sandbox/2713 "2025-08-25T09:35:19Z")
I’m working on the Sandbox with the cosigner feature. Initially, I configured the callback handler URL using a temporary ngrok domain. After restarting my local machine, the domain changed, but I realized the Sandbox onl… --- ## [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… --- ## [Unauthorized: Error getting User certificate" in Sandbox](https://community.fireblocks.com/t/unauthorized-error-getting-user-certificate-in-sandbox/2611)
**Author:** [@10zxz01](https://community.fireblocks.com/u/10zxz01)\ **Replies:** 1\ **Last updated:** [July 28, 2025, 1:45pm UTC](https://community.fireblocks.com/t/unauthorized-error-getting-user-certificate-in-sandbox/2611 "2025-07-28T13:45:06Z")
Hey everyone! :waving\_hand: I’m new here and working on my very first API project using the Fireblocks Developer Sandbox. I’m 17, just starting out in the API security and bug bounty world (I’m a researcher on HackerOne… --- ## [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… --- ## [Issue: API Key Non-Signing Admin Co-Signer Setup](https://community.fireblocks.com/t/issue-api-key-non-signing-admin-co-signer-setup/2544)
**Author:** [@drewjya](https://community.fireblocks.com/u/drewjya)\ **Replies:** 2\ **Last updated:** [June 12, 2025, 2:28am UTC](https://community.fireblocks.com/t/issue-api-key-non-signing-admin-co-signer-setup/2544 "2025-06-12T02:28:15Z")
I’m working in the testnet environment and setting up webhooks to be sent from my local endpoint using ngrok. I’ve successfully created an API Key user with a Non-Signing Admin role. However, I’m encountering an issue: I… --- ## [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/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… --- ## [Using Python-SDK could not create new transaction](https://community.fireblocks.com/t/using-python-sdk-could-not-create-new-transaction/2435)
**Author:** [@dishant-infi](https://community.fireblocks.com/u/dishant-infi)\ **Replies:** 3\ **Last updated:** [May 25, 2025, 2:28pm UTC](https://community.fireblocks.com/t/using-python-sdk-could-not-create-new-transaction/2435 "2025-05-25T14:28:06Z")
I am using Latest fireblock Python SDK to integrate with fireblocks api. With some trial and error i successfully created new vault account and BTC\_TEST asset wallet. But when i tried to create a Transfer transaction fr… --- ## [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… --- ## [Address generation and Transaction creation method for Bep20 and ERC20 Tokens](https://community.fireblocks.com/t/address-generation-and-transaction-creation-method-for-bep20-and-erc20-tokens/2454)
**Author:** [@pemaju02](https://community.fireblocks.com/u/pemaju02)\ **Replies:** 4\ **Last updated:** [May 22, 2025, 9:11am UTC](https://community.fireblocks.com/t/address-generation-and-transaction-creation-method-for-bep20-and-erc20-tokens/2454 "2025-05-22T09:11:29Z")
We had a clarity for ETH, BNB, and BTC in the Sandbox workspace, using (ETH\_TEST5, BNB\_TEST, BTC\_TEST) for address generation and transaction creation. Now, we need to integrate support for BEP20 and ERC20 tokens. For e… --- ## [Issue with Custom Token Fee Estimation and Price Feed](https://community.fireblocks.com/t/issue-with-custom-token-fee-estimation-and-price-feed/2405)
**Author:** [@shubhamsharma0040](https://community.fireblocks.com/u/shubhamsharma0040)\ **Replies:** 11\ **Last updated:** [April 29, 2025, 12:19pm UTC](https://community.fireblocks.com/t/issue-with-custom-token-fee-estimation-and-price-feed/2405 "2025-04-29T12:19:53Z")
Hi all I’ve whitelisted a custom token, but I’m encountering issues with fee estimation and withdrawals for this token. Interestingly, this issue doesn’t occur with other tokens I’ve whitelisted, such as a custom USDT t… --- ## [AxiosError: Request failed with status code 401](https://community.fireblocks.com/t/axioserror-request-failed-with-status-code-401/2396)
**Author:** [@pemaju02](https://community.fireblocks.com/u/pemaju02)\ **Replies:** 6\ **Last updated:** [April 29, 2025, 6:30am UTC](https://community.fireblocks.com/t/axioserror-request-failed-with-status-code-401/2396 "2025-04-29T06:30:25Z")
Now we have using this code, but can’t able to access the supported assets. Instead of getting error like AxiosError: Request failed with status code 401 const apiSecret = fs.readFileSync(path.resolve(\_\_dirname, “../… --- ## [Message: 'Unauthorized: Token was not accepted.',](https://community.fireblocks.com/t/message-unauthorized-token-was-not-accepted/2387)
**Author:** [@rishi33785](https://community.fireblocks.com/u/rishi33785)\ **Replies:** 1\ **Last updated:** [April 29, 2025, 2:00am UTC](https://community.fireblocks.com/t/message-unauthorized-token-was-not-accepted/2387 "2025-04-29T02:00:52Z")
code async createApiUser(){ const projectRoot = join(\_\_dirname, ‘..’); const secretKeyPath = join(projectRoot, ‘src’, ‘fireblocks\_secret.key’); try { const data = await this.fireblocks.apiUser.createApiUser({ creat… --- ## [Lacking permissions](https://community.fireblocks.com/t/lacking-permissions/2386)
**Author:** [@rishi33785](https://community.fireblocks.com/u/rishi33785)\ **Replies:** 1\ **Last updated:** [April 25, 2025, 8:21am UTC](https://community.fireblocks.com/t/lacking-permissions/2386 "2025-04-25T08:21:02Z")
My Logs message: ‘Lacking permissions’, staus: 403 my code async getApiUser(){ try{ const data = await this.fireblocks.apiUser.getApiUsers() console.log(“api users”,JSON.stringify(data,null,2)) }catch(err){ cons… --- ## [How can I get Ethereum public key?](https://community.fireblocks.com/t/how-can-i-get-ethereum-public-key/2379)
**Author:** [@lmorais](https://community.fireblocks.com/u/lmorais)\ **Replies:** 1\ **Last updated:** [April 23, 2025, 6:48am UTC](https://community.fireblocks.com/t/how-can-i-get-ethereum-public-key/2379 "2025-04-23T06:48:49Z")
I’m trying to retrieve the public key for an asset (Ethereum) on a specific Vault and I saw this endpoint here: How can I use it for Ethereum, it requires BIP-44 information which is bitcoin exclusive. Is it safe to j… [Next page](https://community.fireblocks.com/tag/getting-started/3.md?match_all_tags=true&page=1&tags%5B%5D=getting-started)