Bitcoin unconfirmed transaction count

We offer two different options for testing your blockchain application: Bitcoin Testnet3, and BlockCypher's Test Chain. We offer automated faucets for BlockCypher's Test Chain. We recommend using BlockCypher's Test Chain for a variety of reasons:. In case you missed the Resources section , the BlockCypher Test Chain is accessible from this resource:. To help facilitate automated testing in your applications, a faucet endpoint is available on both BlockCypher's Test Chain and Bitcoin Testnet3. Calling the faucet endpoint, along with passing a valid address, will automatically createand propagatea new transaction funding the address with the amount you provide.

This example shows how to leverage the faucet to programmatically fund addresses, to test your applications. While the example used BlockCypher's Test Chain, the same example could have used Bitcoin Testnet3 and worked the exact same way. Some of you might be more interested in the endpoints themselves, in which case, feel free to skip to the next section. But for others, a section dedicated to all of BlockCypher's Objects might prove a useful overview, especially if you're new to Blockchain development in general.

And in either case, this section provides a comprehensive reference for Objects in the API. For each Object there's a description and a link to a germane API endpoint.

Documentation Structure

Typically returned from the Chain API endpoint. A Block represents the current state of a particular block from a Blockchain. Typically returned from the Block Hash and Block Height endpoints. A TX represents the current state of a particular transaction from either a Block within a Blockchain , or an unconfirmed transaction that has yet to be included in a Block. Typically returned from the Unconfirmed Transactions and Transaction Hash endpoints.

Blockchain Unconfirmed Transactions Script TX 2021

A TXInput represents an input consumed within a transaction. Typically found within an array in a TX. A TXOutput represents an output created by a transaction. A TXConfidence represents information about the confidence that an unconfirmed transaction will make it into the next block. Typically used as a return object from the Transaction Confidence Endpoint. A TXRef object represents summarized data about a transaction input or output.


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Typically found in an array within an Address object, which is usually returned from the standard Address Endpoint. A NullData Object is used exclusively by our Data Endpoint to embed small pieces of data on the blockchain. If your data is over 40 bytes, it cannot be embedded into the blockchain and will return an error. An Address represents a public address on a blockchain, and contains information about the state of balances and transactions related to this address. An AddressKeychain represents an associated collection of public and private keys alongside their respective public address.

Generally returned and used with the Generate Address Endpoint. A Wallet contains a list of addresses associated by its name and the user's token. It can be used interchangeably with all the Address API endpoints, and in many places that require addresses, like when Creating Transactions. The name of a wallet must be characters long and cannot start with any characters that start an address for the currency contained in the wallet. For example, bitcoin wallet names cannot start with '1' or '3'. An HDWallet contains addresses derived from a single seed.

Like normal wallets, it can be used interchangeably with all the Address API endpoints, and in many places that require addresses, like when Creating Transactions. It also contains the hex-encoded public key when returned from the Derive Address in Wallet endpoint. A AddressForward object represents a request set up through the Address Forwarding service.

If you're new to blockchains, you can think of the blockchain itself as an immutable, distributed ledger. Each block in the blockchain is like a "page" in the ledger containing information about transactions between parties. A great place to start understanding the mechanics behind blockchains is the original Bitcoin whitepaper. General information about a blockchain is available by GET-ing the base resource. For more detailed information about the data returned, check the Blockchain object.

The returned object contains information about the block, including its height, the total amount of satoshis transacted within it, the number of transactions in it, transaction hashes listed in the canonical order in which they appear in the block, and more. For more detail on the data returned, check the Block object. You can also query for information on a block using its height, using the same resource but with a different variable type. As above, the returned object contains information about the block, including its hash, the total amount of satoshis transacted within it, the number of transactions in it, transaction hashes listed in the canonical order in which they appear in the block, and more.

If you're curious about the adoption of upgrade features on a blockchain, you can use this endpoint to get some information about its state on the network. If you're new to blockchains, you can think of public addresses as similar to bank account numbers in a traditional ledger. The biggest differences:. The Address Balance Endpoint is the simplestand fastestmethod to get a subset of information on a public address. The returned object contains information about the address, including its balance in satoshis and the number of transactions associated with it.

The endpoint omits any detailed transaction information, but if that isn't required by your application, then it's the fastest and preferred way to get public address information. The default Address Endpoint strikes a balance between speed of response and data on Addresses. It returns more information about an address' transactions than the Address Balance Endpoint but doesn't return full transaction information like the Address Full Endpoint.

How to Check Bitcoin Confirmations

The Address Full Endpoint returns all information available about a particular address, including an array of complete transactions instead of just transaction inputs and outputs. Unfortunately, because of the amount of data returned, it is the slowest of the address endpoints, but it returns the most detailed data record. The returned object contains information about the address, including its balance in satoshis, the number of transactions associated with it, and the corresponding full transaction records in descending order by block heightand if multiple transactions associated with this address exist within the same block, by descending block index position in block.

The Generate Address endpoint allows you to generate private-public key-pairs along with an associated public address.

No information is required with this POST request. The returned object contains a private key in hex-encoded and wif-encoded format, a public key, and a public address.


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The Generate Multisig Address Endpoint is a convenience method to help you generate multisig addresses from multiple public keys. After supplying a partially filled-out AddressKeychain object including only an array of hex-encoded public keys and the script type , the returned object includes the computed public address. The Wallet API allows you to group multiple addresses under a single name. It only holds public address information and never requires any private keys. A normal Wallet can be created, deleted, and have addresses added and removed.

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The Wallet itself can have any custom name as long as it does not start with the standard address prefix 1, 3 or bc1 for Bitcoin Mainnet. We also offer support for HD Wallets, which make it easy to manage multiple addresses under a single name. All HD wallet addresses are derived from a single seed. HD Wallets can be created, deleted, and have new addresses generated. However, unlike normal Wallets, addresses cannot be removed.

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

See BIP32 for more info.

bitcoin transaction speed

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.