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October 25, 2022

C# SDK v2.0

C# SDK v2.0: Integration with Ethereum and Bitcoin, Model Validation, and Much More

We have released v2.0 of the Tatum C# SDK. The C# SDK v2.0 allows you as a C# developer to interact with the Tatum APIs and build applications around them.
You can check it out on our GitHub page. We recommend that you start with reviewing the README.
What blockchains are supported? The C# SDK v2.0 supports Ethereum and Bitcoin for now, but we are working on adding support for more blockchains, so stay tuned!
What does v2.0 offer?
  • Integration with the Tatum APIs for Ethereum and Bitcoin
  • Modularity with separate blockchain-targeted packages
  • Built-in model validation
  • Local cryptographic functionalities using relevant packages such as Nethereum and NBitcoin
  • A demo application and code examples demonstrating how to use the SDK in different scenarios
  • Injectable HttpClient and the option to use the Tatum Client as a Typed Client in .NET applications
  • An interface for calls returning the response model or throwing an exception
  • An interface for calls returning an ApiResponse wrapper
  • Support for CancellationToken
  • Built-in documentation generated from OpenAPI specification files
What to do if you are using v1.0 The C# SDK v1.0 has not been maintained by Tatum for a while now and is ultimately community-driven. If you are using the Tatum C# SDK, we recommend that you switch to v2.0.
The SDK v2.0 is structurally different from v1.0, therefore there is no option to upgrade from v1.0 to v2.0. You have to start from scratch. However, we do recommend that you move to v2.0 because v1.0 does not receive new features or bug fixes and no technical support is provided.
Need help?
  • If you are having a technical issue with the C# SDK, please submit an issue to the C# SDK GitHub repository.
  • If you have a question about the C# SDK in general, please post a question in the #tatum-c-sharp Discord channel.
​

October 19, 2022

API v3.17

Avalanche and ZCash: New Blockchains Available via RPC

We have added two more blockchains to the list of the blockchains to which you can connect directly via the node provided by Tatum:
  • ​Avalanche: Contract Chain (C-Chain), Platform Chain (P-Chain), and Exchange Chain (X-Chain) https://{region}.tatum.io/v3/blockchain/node/AVAX/{your_api_key}/{rpc_path}?chainType=avax-c|avax-p|avax-x
  • ​ZCash https://{region}.tatum.io/v3/blockchain/node/ZCASH/{your_api_key}/{rpc_path}

Bitcoin, Bitcoin Cash, Litecoin: New Options when Transferring Cryptocurrency from Address to Address

New options are available for you when you are transferring cryptocurrency on Bitcoin, Bitcoin Cash, or Litecoin.

Specify the transaction fee and change address

Applicable to Bitcoin, Bitcoin Cash, and Litecoin
You can now explicitly specify the amount of the fee that you want to pay for a transfer transaction and the address where the change (any extra funds remaining after the transaction has been completed) will be sent.
{ "fromAddress": [ { "address": "2N9bBiH2qrTDrPCzrNhaFGdkNKS86PJAAAS", "privateKey": "cVX7Y...pzobf" } ], "to": [ { "address": "2MzNGwuKvMEvKMQogtgzSqJcH2UW3Tc5oc7", "value": 0.02969944 } ], "fee": 0.00005, "changeAddress": "2TDrPCzrNhaFS86PJAAASGN9bBiH2qrdkNK" }
For more information, refer to the API Reference on transferring cryptocurrency on Bitcoin, Bitcoin Cash and Litecoin.
The options of specifying the transaction fee amount and change address have been already available for Dogecoin.

Sign transactions with a mnemonic-based signature ID

Applicable only to Bitcoin and Litecoin
If you use Key Management System (KMS) and send cryptocurrency from blockchain addresses (as opposed to sending it from UTXOs), you can now sign transactions with a mnemonic-based signature ID. In this case, you need to also provide the index of the address that you are using this signature ID for.
{ "fromAddress": [ { "address": "2N9bBiH2qrTDrPCzrNhaFGdkNKS86PJAAAS", "signatureId": "1f7f7c0c-...-4b67c43918f6", // mnemonic-based "index": 459 } ], "to": [ { "address": "2MzNGwuKvMEvKMQogtgzSqJcH2UW3Tc5oc7", "value": 0.02969944 } ] }
For more information, refer to the API Reference on transferring cryptocurrency on Bitcoin and Litecoin.

Solana: Gas Fees from Different Address and Risk Assessment

A new option is available for you when you are transferring cryptoassets on Solana. We also enhanced notifications fired by ADDRESS_TRANSACTION subscriptions.

Cover gas fees from a different address

When you are transferring SPL tokens or SOL, you can now specify a different address to cover the gas fees instead of the address that the tokens or SOL are transferred from. To do that, specify the feePayer and feePayerPrivateKey/feePayerSignatureId parameters in the API request body.
  • ​Transferring SPL tokens (see the chainTransferSolanaSpl and chainTransferSolanaSplKMS schemas of the request body) { "chain": "SOL", "from": "BL4Xgn1jkuU4Yr3SQ4HG8cD5SBrsSk7BihKzkb5zTUfs", "to": "FykfMwA9WNShzPJbbb9DNXsfgDgS3XZzWiFgrVXfWoPJ", "contractAddress": "DgS3XZzWiFgrVXfWoPJFykfMwA9WNShzPJbbb9DNXsfg", "amount": "100000", "digits": 18, "fromPrivateKey": "Hdz3ij...buk9V", "feePayer": "SQ4HG8cD5SBrsSk7B3ihKzkb5zTUfsBL4Xgn1jkuU4Yr", "feePayerPrivateKey": "YdQ1i...DMsGaf" }
  • ​Transferring SOL { "from": "BL4Xgn1jkuU4Yr3SQ4HG8cD5SBrsSk7BihKzkb5zTUfs", "to": "FykfMwA9WNShzPJbbb9DNXsfgDgS3XZzWiFgrVXfWoPJ", "amount": "100000", "fromPrivateKey": "Hdz3ij...buk9V", "feePayer": "SQ4HG8cD5SBrsSk7B3ihKzkb5zTUfsBL4Xgn1jkuU4Yr", "feePayerPrivateKey": "YdQ1i...DMsGaf" }

Risk assessment information included in ADDRESS_TRANSACTION notifications

We added a new parameter, addressesRiskRatio, to the notifications fired by ADDRESS_TRANSACTION subscriptions. This parameter provides information about risk levels assigned to the addresses with which your address communicated within the transaction. The addresses are assessed using the AML/CFT solution by BlockmateBC.
{ "address": "BL4Xgn1jkuU4Yr3SQ4HG8cD5SBrsSk7BihKzkb5zTUfs", "txId": "2rdy3...DBk7A", "asset": "3gUeeR3BfVhukYJMwtHownRtRkGcf1bvwiV8TbKMZBVz", ... "addressesRiskRatio": [ { "vTEfAhXTmvgFmepgfhzBbRrJ4EtUP9adbMJjpzLsDMk": 0 }, { "zBbRrJ4EtUP9adbMJjpzLsDMkvTEfAhXTmvgFmepgfh": 100 } ] }
This parameter is enabled only in the notifications sent from the Solana mainnet. This parameter may not appear in a notification if the risk assessment information is not available or could not be retrieved.
For more information, refer to the API Reference on creating subscriptions.
​
KMS v6.2

Key Management System v6.2: Support for Mnemonic-based Signature IDs on Bitcoin and Litecoin

We released version 6.2 of our Key Management System (KMS), which is a comprehensive security solution that generates and stores private keys and uses them to sign transactions locally.
For Bitcoin and Litecoin, KMS can now support mnemonic-based signature IDs.
To download or upgrade KMS, please visit our GitHub page. To learn how to use KMS, see Tatum Key Management System (KMS).
​

September 27, 2022

API v3.16

Ethereum: Support for Goerli Added

In addition to Sepolia, we now support Goerli on Ethereum.
Goerli is an Ethereum proof-of-authority testnet that works across clients. For more information about Goerli, please see the Ethereum user documentation about the Ethereum testnets.
Currently, you can use Goerli in the following scenarios:
  • If you work with Ethereum via a Tatum node. Just add the testnetType parameter to the API endpoint URL and set it to ethereum-goerli: https://{region}.tatum.io/v3/blockchain/node/ETH/{your_api_key}/{rpc_path}?testnetType=ethereum-goerli
  • If you are setting up notifications of the following types on Ethereum:
    • ADDRESS_TRANSACTION
    • CONTRACT_NFT_TXS_PER_BLOCK
    • CONTRACT_MULTITOKEN_TXS_PER_BLOCK
    • CONTRACT_LOG_EVENT Similar to the previous point, add the testnetType parameter to the API endpoint URL and set it to ethereum-goerli: https://{region}.tatum.io/v3/subscription?testnetType=ethereum-goerli
We are working on implementing Goerli in all our APIs that support Ethereum. Stay tuned!

Gas Pump: New Workflow Introduced

We updated our Gas Pump solution to make it more cost-efficient for you.
What is Gas Pump? Gas Pump is Tatum's feature that helps you manage gas fees in a custodial application. When you use Gas Pump, gas fees for any transaction made by your customers (users of your custodial application) are automatically deducted from the master address instead of the customer's address. This eliminates the need to send crypto to each customer's address to pay for gas fees.
What has changed and what remained unchanged? The main changes were made in the processes of setting up a Gas Pump solution:
  • You no longer need to deploy a separate smart contract that would act as a gas pump wallet to cover your customers’ gas fees. Instead, you would start with precalculating gas pump addresses that you can immediately assign to the customers of your custodial application, and the customers can start receiving funds to their addresses right away. No gas fee is applied to the precalculation operation.
  • Gas fees are first introduced when your customers decide to send funds from their gas pump addresses to other blockchain addresses. To allow them to do that, you need to activate the addresses. The activation operation costs some amount of gas on a blockchain, so you would activate only those addresses that will be sending funds instead of activating all the addresses.
What has not changed are the processes for sending one or multiple assets from a gas pump address as well as approving the asset transfer. They work exactly as they worked before.
What’s the new workflow to set up Gas Pump? Here is how it works now:
  1. 1.
    ​Precalculate gas pump addresses and assign them to your customers.
  2. 2.
    Set up the activation process to activate a gas pump address by demand (for example, you may want to activate an address when the customer tries to send an asset from this address for the first time).
  3. 3.
    Any time a customer tries to send funds from their gas pump address, check whether the address is activated before allowing the customer to complete the transfer.
What about the APIs? To help you understand the changes better, here is how the API Reference was updated to reflect the new workflow:
​
  • #1 are the newly added APIs.
  • #2 are the APIs that remain unchanged and work exactly as before.
  • #3 are the APIs calls that were replaced by the new APIs and are now deprecated.
How does this affect the Gas Pump solution running in your application? The Gas Pump solution that you implemented in your application will continue working normally. The changes that we introduced do not break any existing implementation, and you do not need to make any immediate change to your current processes.
Here is what you need to know:
However, we recommend that you switch to the new workflow: next time you need to add new addresses, precalculate them!
Where can you find more information? Please refer to Pay Gas Fees with Tatum Gas Pump and the API Reference.

Submit Multiple RPC Methods in One API Call

When working with blockchains by connecting to a blockchain node using the POST or PUT method, you can now submit multiple RPC methods in one API call for the blockchains using the JSON-RPC 2.0 specification.
To do so, construct the request body as follows:
[ { "jsonrpc": "2.0", "id": 1, "method": "{method_1_name}", "params": [] }, { "jsonrpc": "2.0", "id": 2, "method": "{method_2_name}", "params": [] }, ... ]
Please be aware that the number of credits consumed by one API call depends on how many methods you submitted in the call:
  • Connecting using POST:
    • 50 credits per debug*/trace* method (for EVM-based blockchains)
    • 5 credits per eth_call method (for EVM-based blockchains)
    • 2 credits per any other RPC method
  • Connecting using PUT: 2 credits per RPC method

Notifications: Number of Credits Consumed Updated

For a few types of the notification subscriptions, the number of credits that each notification consumes was updated.
Here are the notification types that were affected and how many credits they consume now:
  • ADDRESS_TRANSACTION
    • Bitcoin (BTC) - 5 credits per address per day
    • Bitcoin Cash (BCH) - 5 credits per address per day
    • Dogecoin (DOGE) - 7 credits per address per day
    • Litecoin (LTC) - 7 credits per address per day
  • CONTRACT_NFT_TXS_PER_BLOCK - 500,000 credits per day on any supported blockchain
  • CONTRACT_MULTITOKEN_TXS_PER_BLOCK - 500,000 credits per day on any supported blockchain
  • CONTRACT_LOG_EVENT - 50,000 credits per day on any supported blockchain

Lisk and Neo: Available Only via RPC

You can now work with Lisk and Neo only by connecting to them directly via RPC nodes.

Qtum: End of Support

Following the deprecation, we disabled and completely removed Qtum from our platform. It is no longer supported.
​
KMS v5.1

Key Management System v5.1: Support for AWS Secrets Manager Added

We released version 5.1 of our Key Management System (KMS), which is a comprehensive security solution that generates and stores private keys and uses them to sign transactions locally.
KMS can now be integrated with AWS Secrets Manager where you can store your keys and mnemonics.
To download or upgrade KMS, please visit our GitHub page. To learn how to use KMS, see Tatum Key Management System (KMS).
​

September 6, 2022

API v3.15.0

New Blockchains Available via RPC

We have enabled quite a few new blockchains in the API for connecting to a blockchain via a Tatum node:
https://{region}.tatum.io/v3/blockchain/node/{blockchain}/{your_api_key}/{rpc_path}
Now, you can you this API to connect to the following blockchains:
  • Arbitrum (ARB)
  • Aurora (AURORA)
  • Cronos (CRO)
  • Gnosis (GNO)
  • Kusama (KSM)
  • NEAR (NEAR)
  • Oasis (OASIS)
  • Optimism (OPTIMISM)
  • Palm (PALM)
  • Polkadot (DOT)
  • RSK (RSK)
  • Tezos (TEZOS)
  • TRON (TRON)
For more information about the API for connecting to a blockchain via a Tatum node, please refer to the API Reference.

Solana: Mint and Verify NFTs in Collections

On Solana, you can now mint an NFT as part of a collection. You can also verify that an NFT is indeed a part of a collection.
  • The collection must be a sized collection that was introduced in Version 1.3 of the Metaplex Token Metadata program.
  • Verifying an NFT means that the NFT is really a part of the collection (setting the Verified parameter to true for the NFT)
To know more about Solana collections and verification, please refer to the Solana user documentation.
Minting NFTs in a collection
Minting an NFT as part of a collection is supported for both minting via NFT Express and minting natively. In either case, you have to add the collection parameter to the metadata section of the API request body and set it to the blockchain address of the NFT collection where the NFT should be minted in:
{ "chain": "SOL", "to": "FykfMwA9WNShzPJbbb9DNXsfgDgS3XZzWiFgrVXfWoPJ", ... "metadata": { "name": "My NFT", "symbol": "NFT_SOL_CLASSIC", "sellerFeeBasisPoints": 0, "uri": "https://my_nft_data.com", "collection": "66MZJWWM7ucWay8R2BzYgZnSu6zbMBVKBQz1if85d7ud" } }
Verifying the NFT in the collection
  • If you mint the NFT natively, the minted NFT gets automatically verified in the collection at the time of the minting, and you do not need to perform any additional steps to verify it. The verification will be done on behalf of the blockchain address specified in the from parameter in the API request body.
  • If you mint the NFT using NFT Express, the NFT is minted as not verified. To verify the NFT in the collection, use the verification API. { "chain": "SOL", "nftAddress": "CHw1Fy5YdbaaosLXrrxhuc3X3fpssMqDQm9XwJh9LPGe", "collectionAddress": "66MZJWWM7ucWay8R2BzYgZnSu6zbMBVKBQz1if85d7ud", "from": "XsfgDgS3XZzWiFgrVXfWoPJFykfMwA9WNShzPJbbb9DN", "fromPrivateKey": "3abc79...391ad" }
Need more information?
Please refer to our API Reference:

Get Notified about Smart Contract Events on Blockchain

We added three new types of the subscriptions that allow you to get notified about various events related to smart contracts across a whole blockchain:
  • CONTRACT_LOG_EVENT
  • CONTRACT_NFT_TXS_PER_BLOCK
  • CONTRACT_MULTITOKEN_TXS_PER_BLOCK
What do these new notification types do?
  • A subscription of the CONTRACT_LOG_EVENT type sends a notification about any event that was emitted from any smart contract on a blockchain.
  • A subscription of the CONTRACT_NFT_TXS_PER_BLOCK type sends a notification about any event of minting, transferring, or burning an NFT that was emitted from any smart contract on a blockchain.
  • A subscription of the CONTRACT_MULTITOKEN_TXS_PER_BLOCK type sends a notification about any event of minting, transferring, or burning a Multi Token that was emitted from any smart contract on a blockchain.
These notifications are fired as a batch notification per block: a notification includes all the relevant events from all smart contracts that got recorded into a block, so you get one notification per block, not per individual event.
What blockchains are supported?
The new subscription types are supported on the following blockchains:
  • BNB Smart Chain
  • Celo
  • Ethereum
  • Klaytn
  • Polygon
Need more information?
For information about the new notification types, their body structure, and credits consumed, please refer to the API for creating subscriptions in our API Reference.

Cardano: Support Deprecated, RPC Access Remains

We deprecated support for Cardano.
What does it mean?
  • The blockchain-specific APIs such as https://{region}.tatum.io/v3/ada/... are now marked as deprecated in the API Reference. While those APIs may still be usable, they would accept calls only to the mainnet. Calls to the testnet are not supported. We recommend that you stop using these APIs.
  • In the APIs where Cardano or its assets can be used as a parameter in the request body or as a path parameter, Cardano or ADA are no longer available in the list of available values for these parameters. For example, ADA is no longer listed as a possible value for the currency parameter for https://{region}.tatum.io/v3/tatum/rate/{currency}. Other than that, those APIs do not change in any way.
  • You still can connect to Cardano (the mainnet only) directly via a Tatum node.
Need help?
If you have any question or concern regarding the deprecation, please contact Tatum Support at [email protected] or post a question in the #api channel on our Discord.

Improved Error Messages

Error messages with a server code of 4xx and 5xx may now contain the cause parameter in the response body with additional information about the cause of the error and other details that may help fix the issue.
For example:
{ "statusCode": 403, "errorCode": "sol.transaction.failed", "message": "Failed creating transaction. ", "cause": "unknown signer: FykfMwA9WNShzPJbbb9DNXsfgDgS3XZzWiFgrVXfWoPJ" }
If no additional information is available for the error, the cause parameter is not returned.

Notifications: Free Plan Limit

For the Free pricing plan only
Please be aware that the number of sent notifications (web hooks) for the Free pricing plan is limited to 1,000 per month. The notifications above the limit of 1,000 are not sent.
If this is not sufficient for your needs, please consider switching to a paid pricing plan.

Terra: End of Support

Following the deprecation, we disabled and completely removed Terra from our platform. It is no longer supported.
​
Dashboard v1.24.0

Dashboard: History of Credit Consumption

You can now check the history of your credit consumption on the Dashboard.
Click your avatar in the top right corner, and select Billing.
​
Your credit consumption history is available under Your credit consumption.
The number of credits consumed is broken down by billing period (one period per page). The credits spent during one billing period are grouped by the pricing plan and the API keys.
Need more information?
For detailed information about the Dashboard and its options, please see Tatum Dashboard.
If you do not have an account on the Dashboard yet, you can sign up here.
​

August 11, 2022

API v3.14.0

Ethereum: Get Notified when Transaction Appears in Mempool

Great news for our Ethereum users: you can now use the ADDRESS_TRANSACTION and ACCOUNT_PENDING_BLOCKCHAIN_TRANSACTION notification subscriptions to get notified when a transaction related to your Ethereum blockchain address or ETH virtual account appears in the mempool.
This will help you find out about such transactions before they get added to a block.
What are these subscription types for, anyway?
  • A subscription of the ADDRESS_TRANSACTION type sends a notification about any transaction (incoming or outgoing) at a specified blockchain address.
  • A subscription of the ACCOUNT_PENDING_BLOCKCHAIN_TRANSACTION type sends a notification about incoming transactions on a virtual account.
What exactly changed for these subscription types?
  • When you set up an ADDRESS_TRANSACTION subscription for an Ethereum address, a notification will now be sent to you as soon as a transaction made from/to your address hits the mempool. The body of such notification includes a new parameter, mempool, set to true, which means that the transaction has been detected in the Ethereum mempool: { "address": "0x9WNce4e40889a13971681391AAd29E88eFAF91f7", "txId": "0x45af182a0ffab58e5ba32...c76c7ee22d72dea99", "asset": "ETH", "amount": "0.00004", "mempool": true, "type": "native", "counterAddress": undefine } Notice that the blockNumber parameter is not present in the notification because the transaction has not been added to any block yet. Once the transaction is added to a block, another notification will be sent. This notification is not going to have the mempool parameter, but it will include the number of the block where the transaction was recorded into. NOTE: Nothing has changed for ADDRESS_TRANSACTION subscriptions for the other supported blockchains: for them, a notification is still sent when a transaction is added to a block.
  • When you set up an ACCOUNT_PENDING_BLOCKCHAIN_TRANSACTION subscription for a virtual account in ETH, a notification will now be sent to you as soon as a transaction to your virtual account hits the mempool. In the body of such notification, the blockHash and blockHeight parameters are set to null because the transaction has not been added to any block yet: { "date": 1619176527481, "amount": "0.0005", "currency": "ETH", "accountId": "1124vb946371b0047825c6a0", "reference: "c9875708-4ba3-41c9-a4cd-271048b41b9a", "txId": "0x45af182a0ffab58e5ba32...c76c7ee22d72dea99", "blockHash": null, "blockHeight": null, "from": "0xFykfMwA9WNShzPJbbb9DNXsfgDgS3XZzWiFgrVXw" "to": "0x9WNce4e40889a13971681391AAd29E88eFAF91f7", "index": null } The virtual account balance, however, will not be updated until the transaction is added to a block. Instead, a deposit corresponding to the pending transaction with a status of "in progress" will appear on the virtual account. Once the transaction is added to the block, the deposit's status will change to "done", and the account balance will be credited with the transaction amount. If you want to get a notification about the balance update, create a subscription of the ACCOUNT_INCOMING_BLOCKCHAIN_TRANSACTION type. NOTE: Nothing has changed for ACCOUNT_PENDING_BLOCKCHAIN_TRANSACTION subscriptions for the other supported blockchains: for them, a notification is still sent when a transaction appears in a block for the first time.
Need more information about the subscriptions?
Please refer to our API Reference and the following articles:

Ethereum: Sepolia Replaced Rinkeby and Ropsten

Following the deprecation of the Rinkeby and Ropsten support, we dropped both Rinkeby and Ropsten completely.
From now on, Sepolia is the default Ethereum testnet.
What does it mean?
  • Any API call explicitly made toward Rinkeby or Ropsten will either fail with a validation error (no endpoint found) or be automatically redirected to Sepolia and return the requested data from Sepolia instead of Rinkeby or Ropsten. For example, requesting the number of the latest block on Ropsten will return the number of the latest block on Sepolia.
  • You cannot access any of your data on Ropsten or Rinkeby such as NFTs, smart contracts, or transactions. However, you can still reuse your existing addresses and private keys as well as notifications attached to the addresses on Sepolia. Virtual accounts and subscriptions attached to them remain under your API key but reference Sepolia.
How can you adopt the changes?
Consider migrating your projects to Sepolia.
  • Redeploy your smart contracts on Sepolia.
  • Check whether your code references Rinkeby and/or Ropsten. If so, update it to either rely on the Tatum API to choose the testnet for you, or point to Sepolia explicitly.
Need more information about the Ethereum testnets?

Fantom: New Blockchain Available via RPC

We have added Fantom to the list of the blockchains to which you can connect directly via the node provided by Tatum:
https://{region}.tatum.io/v3/blockchain/node/FTM/{your_api_key}/{rpc_path}
For more information about Fantom RPCs, please refer to the Fantom user documentation.
​

July 22, 2022

KMS v5.0

Key Management System: Version 5.0 Available

We released version 5.0 of our Key Management System (KMS). KMS is a comprehensive security solution that generates and stores private keys and uses them to sign transactions locally.
KMS version 5.0 brings improved performance: it can take up to 25,000 signature IDs in one go, which means more transactions get signed and sent out to a blockchain for further processing.
To download or upgrade KMS, please visit our GitHub page. To learn how to use KMS, see this article.
​
API v3.13.0

Ethereum: Sepolia Replaces Rinkeby and Ropsten

Following the Ethereum deprecation announcement, we deprecated support for the Rinkeby and Ropsten testnets on Ethereum. We are going to drop both Rinkeby and Ropsten completely in the next release, which is planned to happen in early August. We will post a separate announcement when it happens.
When Rinkeby and Ropsten are made unavailable, Sepolia will become the default Ethereum testnet. That means that any API call made toward an Ethereum testnet will be directed to Sepolia.
Is Sepolia already available for use?
Yes. You can use Sepolia if you work with Ethereum via the blockchain node provided by Tatum. Just add the testnetType parameter to the API endpoint URL and set it to ethereum-sepolia:
https://{region}.tatum.io/v3/blockchain/node/ETH/{your_api_key}/{rpc_path}?testnetType=ethereum-sepolia
How can you get prepared?
Please check whether your code references Rinkeby and/or Ropsten. If so, prepare an update to either rely on the Tatum API to choose the testnet for you, or point to Sepolia explicitly.

TRON: Negative Number Issue in Notifications Fixed

We fixed the issue that occurred in the ADDRESS_TRANSACTION notifications sent for the native currency transactions on TRON. These are transactions where an amount in native TRON currencies (TRX, TRC-10, or TRC-20) is transferred from one address to the other. Such transactions have the type set to native in the notifications.
In such notifications, the amount sometimes was displayed as a negative number, for example:
"amount": "-2"
This has been fixed. Now, the amount in the notifications for native TRON currency transactions is always returned as a positive number.
​

June 24, 2022

API v3.12.0

Support for Blockchains Deprecated: EOSIO, Lisk, Neo, Qtum, and Terra (LUNA)

We deprecated support for the following blockchains:
  • EOSIO (EOS)
  • Lisk (LSK)
  • Neo (NEO)
  • Qtum (QTUM)
  • Terra (LUNA)
What does it mean?
  • For the specified blockchains, the blockchain-specific APIs are now marked as deprecated in the API Reference. The blockchain-specific APIs are the APIs with the endpoint explicitly pointing to the blockchain, for example, https://{region}.tatum.io/v3/neo/... or https://{region}.tatum.io/v3/qtum/.... Those APIs are still usable, but we recommend that you stop using them. Eventually, we will disable and remove those APIs completely.
  • In the APIs where the specified blockchains or their assets can be used as a parameter in the request body or as a path parameter, the blockchains are no longer available in the list of available values for these parameters. For example, EOS and LUNA are no longer listed as possible values for the currency parameter for https://{region}.tatum.io/v3/tatum/rate/{currency}. Other than that, those APIs do not change in any way.
  • For EOSIO and Lisk, you still can and will be able to connect to the blockchains directly via RPC nodes.
Need help?
If you have any question or concern regarding the deprecated blockchains, please contact Tatum Support at [email protected] or post a question in the #api channel on our Discord.
​
Dashboard v1.23.0

Dashboard: Minor Tweaks and Bug Fixes

For our Dashboard, we fixed a few bugs and made some improvements in the underlying processes. We are working on new features - please stay tuned!
If you do not have a Dashboard account yet, you can sign up here.
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June 10, 2022

Dashboard v1.22.0

New Features on Dashboard

We added a few new features to our Dashboard. Check them out at https://dashboard.tatum.io/.
If you do not have an account yet, you can sign up here.
What’s new on the Dashboard?
The menu panel now includes the following options:
  • Explore (and its underlying options)
  • NFT Minter
  • The options under Explore let you review your assets and activities:
    • Debug This option has already been here before, we just moved it under Explore. Here, you can see the last 100 API calls that you made.
    • Deposits This option lists the deposits that you have made and received and lets you filter them by different criteria (from, to, currency, status, and so on).
    • Subscriptions This option lists your existing subscriptions and lets you create a new subscription right from the Dashboard.
    • Webhooks This option lists the last 10 webhook calls that have been made based on your subscriptions, including those that failed.
    • Virtual Accounts This option lists your existing virtual accounts and lets you filter them by different criteria (active/frozen, currency, customer ID, and so on).
  • NFT Minter allows you to mint NFTs right from the Dashboard and without the need to make API calls. You can mint NFTs for the following blockchains:
    • BNB Smart Chain (BSC)
    • Celo (CELO)
    • Ethereum (ETH)
    • Harmony (ONE)
    • Klaytn (KLAY)
    • Polygon (MATIC)
    • Solana (SOL)
Please be aware of the following:
  • All the new features use the corresponding APIs in the background (for example, listing the webhook calls under Webhooks uses the API for listing executed webhooks). Each API call consumes a specific number of credits. Please review the API Reference to see how many credits each API consumes.
  • NFT Minter runs on the API for minting NFTs and uses the NFT Express feature. When used on the mainnet, NFT Express works only with paid Tatum plans: Tatum covers the minting fee for you and then deducts the corresponding number of credits from your monthly credit allowance.
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June 3, 2022

API v3.11.0

Solana and Algorand: Get the Number of Fungible Tokens per Address

For the Solana and Argoland blockchains, you can now retrieve the number of fungible (ERC-20 equivalent) tokens that a specific blockchain address holds.
To do so, use the API for getting ERC-20 tokens per address, and make sure to replace the chain path parameter with either SOL or ALGO.
https://{region}.tatum.io/v3/blockchain/token/address/SOL/{blockchain_address}
https://{region}.tatum.io/v3/blockchain/token/address/ALGO/{blockchain_address}

Solana: Get the List of NFTs per Address

For the Solana blockchain, you can now retrieve the list of NFTs that a specific blockchain address holds.
To do so, use the API for getting NFTs per address, and make sure to replace the chain path parameter with SOL.
https://{region}.tatum.io/v3/nft/address/balance/SOL/{blockchain_address}
The API returns the IDs of the NFTs connected to the address.
For a blockchain address that has fewer than 50 NFTs, the API also returns each NFT's metadata. If the metadata is not returned, you can obtain it using the metadata API.

Solana: Manage SPL Tokens

For the Solana blockchain, you can now manage SPL (Solana Program Library) tokens.
SPL tokens are Solana-specific fungible tokens equivalent to the Ethereum ERC-20 tokens.
Here is what you can do:
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