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It ignores existing signatures. It is equivalent to calling createrawtransaction followed by converttopsbt. The transaction is not stored in the wallet or transmitted to the network. But does not remove it from the wallet. This is only to enable encryption for the first time. After encryption is enabled, you will need to enter the passphrase to use private keys. External clients can query and use this data in their own fee estimation logic. If the account doesn't exist, it creates both the account and a new address for receiving payment.

Once a payment has been received to an address, future calls to this RPC for the same account will return a different address. Some information requires the address to be in the wallet. All amounts are in satoshis. If an account is specified, payments received with the address will be credited to that account. It may be used to find nodes to connect to without using a DNS seeder. This is for use with raw transactions, not normal use. It does not count coinbase transactions.

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Note that this call may take some time and that it only counts outputs from confirmed transactionsit does not count outputs from the memory pool. Commands which are unavailable will not be listed, such as wallet RPCs if wallet support is disabled.

Meant for use with pruned wallets. Requires a new wallet backup. These keys will be added to the keys currently in the wallet. This call may need to rescan all or parts of the block chain for transactions affecting the newly-added keys, which may take several minutes.

When creating a wallet, one can optionally include one or more "subchain" indexes.

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These subchains can later be referenced when generating new addresses or sending txs. If no index is given when using the wallet with other APIs, it defaults to using the wallet's first sub chain. Note that this is different from the default BIP32 wallet layout. If an address ahead of current addresses listed in an HD Wallet receives a transaction, it will be added, along with any addresses between the new address and the last used one.

In general, using a wallet instead of an address in an API will have the effect of batching the set of addresses contained in the wallet. The following code examples should be considered serially; that is to say, the results will appear as if each API call were done sequentially.

As you'll see in the examples, if you're using HD Wallets, take care to use the appropriate resource e. For normal wallets, at minimum, you must include the name attribute and at least one public address in the addresses array. The encoding of the key is documented here. If not given, the wallet will derive address straight from the given extended pubkey.

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See BIP32 for more info. If successful, it will return the same Wallet or HDWallet object you requested, appended with your user token. You can then query detailed information on individual wallets via their names by leveraging the Get Wallet Endpoint. You only need to include the additional addresses in a new addresses array in the object. If successful, it will return the newly modified Wallet , including an up-to-date, complete listing of addresses.

It returns the addresses in a partially filled out Wallet which you'll find under the addresses attribute. If successful, it will return an HTTP status code with no return object. If successful, it will returned the newly modified Wallet composed with an AddressKeychain. If successful, it will return an HDWallet but only with the newly derived address es represented in its chains field to limit the data transmitted; for the full address list after derivation, you can follow up this API call with the Get Wallet Addresses Endpoint. If you're new to blockchains, the idea of transactions is relatively self-explanatory.

Here's what's going on underneath the hood: a transaction takes previous "unspent transaction outputs" also known as UTXOs as "transaction inputs" and creates new "locking scripts" on those inputs such that they are "sent" to new addresses to become new UTXOs. While most of these public addresses are reference points for single private keys that can "unlock" the newly created UTXOs, occasionally they are sent to more exotic addresses through pay-to-script-hash , typically multisignature addresses.

The Transaction Hash Endpoint returns detailed information about a given transaction based on its hash. TXHASH is a string representing the hex-encoded transaction hash you're interested in querying, for example:. The returned object contains detailed information about the transaction, including the value transfered, date received, and a full listing of inputs and outputs. The Unconfirmed Transactions Endpoint returns an array of the latest transactions relayed by nodes in a blockchain that haven't been included in any blocks.

The returned object is an array of transactions that haven't been included in blocks, arranged in reverse chronological order latest is first, then older transactions follow. To use BlockCypher's two-endpoint transaction creation tool, first you need to provide the input address es , output address, and value to transfer in satoshis. Provide this in a partially-filled out TX request object.

As you can see from the code example, you only need to provide a single public address within the addresses array of both the input and output of your TX request object. You also need to fill in the value with the amount you'd like to transfer from one address to another.

Blockchain Developer API for Bitcoin, Ethereum, Testnet, Litecoin and More | BlockCypher

If you'd like, you can even use a Wallet instead of addresses as your input. While this particular usage will differ between client libraries, the result is the same: the addresses within your wallet will be used as the inputs , as if all of them had been placed within the addresses array. As a return object, you'll receive a TXSkeleton containing a slightly-more complete TX alongside data you need to sign in the tosign array. You'll need this object for the next steps of the transaction creation process.

For the extra cautious, you can protect yourself from a potential malicious attack on BlockCypher by validating the data we're asking you to sign. Unfortunately, it's impossible to do so directly, as pre-signed signature data is hashed twice using SHA With your TXSkeleton returned from the New Transaction Endpoint, you now need to use your private key s to sign the data provided in the tosign array. Digital signing can be a difficult process, and is where the majority of issues arise when dealing with cryptocurrency transactions.

We are working on integrating client-side signing solutions into our libraries to make this process easier. You can read more about signing here.

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In the mean time, if you want to experiment with client-side signing, consider using our signer tool. Once you've finished signing the tosign array locally, put that hex-encoded data into the signatures array of the TXSkeleton. Signature and public key order matters, so make sure they are returned in the same order as the inputs you provided.

Signing and creating transactions can be one of the trickiest parts of using blockchains in your applications.

By default, we allow unconfirmed UTXOs as inputs when creating transactions. We will compute change and fees the same way. Fees in cryptocurrencies can be complex. We provide 2 different ways for you to control the fees included in your transactions:. To learn more about fees, bitcoinfees. You'll notice this used to powerful effect in the section on Multisig Transactions. These are the possible script types:. If you'd prefer to use your own transaction library instead of the recommended path of our two-endpoint transaction generation we're still happy to help you propagate your raw transactions.

Simply send your raw hex-encoded transaction to this endpoint and we'll leverage our huge network of nodes to propagate your transaction faster than anywhere else. If you'd like, you can use the decoded transaction hash alongside an Event to track its progress in the network. We also offer the ability to decode raw transactions without sending propagating them to the network; perhaps you want to double-check another client library or confirm that another service is sending proper transactions. This allows you to double check the which input you are spending and the value transfered.

If it succeeds, you'll receive your decoded WitnessToSignTx object. Multisignature transactions are made simple by the method described in the Creating Transactions section, but they deserve special mention. In order to use them, you first need to fund a multisignature address. The code example demonstrates how the partially filled TX request object would appear.

If it returns with an HTTP Status Code , then your multisignature address via a pay-to-script-hash address is funded. Once funded, you might want to programmatically spend the money in the address at some point. Here the process is similar, but with the inputs and outputs reversed.

Then you'd need to return each piece of data signed twice, preserving order between signatures and pubkeys, resulting in four elements for the signatures and pubkeys arrays:. While you can certainly use our guided transaction process and customize your script output, there's a simpler way: through our Data Endpoint. All you need is the data you want to embed up to 40 bytes, inclusive and we'll handle the rest.

In your request object, simply include the data you want to embed.