Esplora JS API - Blockstream.info

Easy way to add BlockStream.info API to your JS application.

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References

• Blockstream Info: https://blockstream.info
• API Documentation: https://github.com/Blockstream/esplora/blob/master/API.md

Features

• Fees
  • Get Fees Recommended
• Mempool
  • Get Mempool
  • Get Mempool Recent
  • Get Mempool Txids
• Blocks
  • Get Block
  • Get Block Header
  • Get Block Status
  • Get Block Txs
  • Get Block Txids
  • Get Block Txid
  • Get Block Raw
  • Get Blocks Height
  • Get Blocks
  • Get Blocks Tip Height
  • Get Blocks Tip Hash
• Transactions
  • Get Tx
  • Get Tx Status
  • Get Tx Hex
  • Get Tx Raw
  • Get Tx Merkle Block Proof
  • Get Tx Merkle Proof
  • Get Tx Outspend
  • Get Tx Outspends
• Addresses
  • Get Address
  • Get Address Txs
  • Get Address Txs Chain
  • Get Address Txs Mempool
  • Get Address Txs Utxo
• Assets (Liquid Only)
  • Get Asset
  • Get Asset Txs
  • Get Asset Txs Mempool
  • Get Asset Registry
  • Get Asset Supply
  • Get Asset Txs Chain
  • Get Asset Txs Mempool

Installation

Using npm:

$ npm install esplora-js

Using yarn:

$ yarn add esplora-js

Usage

Get Fees Recommended

Get an object where the key is the confirmation target (in number of blocks) and the value is the estimated feerate (in sat/vB).

[ Example ] [ Top ]

import { fees } from 'esplora-js';
...
const feesRecommended = await fees.getFeesRecommended();
console.log(feesRecommended);

Get Mempool

Get mempool backlog statistics.

[ Example ] [ Top ]

import { mempool } from 'esplora-js';
...
const getMempool = await mempool.getMempool();
console.log(getMempool);

Get Mempool Txids

Get the full list of txids in the mempool as an array. The order of the txids is arbitrary and does not match bitcoind's.

[ Example ] [ Top ]

import { mempool } from './../src/';
...
const getMempoolTxids = await mempool.getMempoolTxids();
console.log(getMempoolTxids);

Get Mempool Recent

Get a list of the last 10 transactions to enter the mempool. Each transaction object contains simplified overview data, with the following fields: txid, fee, vsize and value.

[ Example ] [ Top ]

import { mempool } from 'esplora-js';
...
const getMempoolRecent = await mempool.getMempoolRecent();
console.log(getMempoolRecent);

Get Block

Returns information about a block.

Parameters:

• {Object} params - Params object.
• {string} params.hash - Hash from a block

[ Example ] [ Top ]

import { blocks } from 'esplora-js';
...
const block = await blocks.getBlock({
  hash: '000000000000000015dc...'
});
console.log(block);

Get Block Status

Returns the block status.

Parameters:

• {Object} params - Params object.
• {string} params.hash - Hash from a block

[ Example ] [ Top ]

import { blocks } from 'esplora-js';
...
const blockStatus = await blocks.getBlockStatus({
  hash: '000000000000000015dc...'
});
console.log(blockStatus);

Get Block Header

Returns the hex-encoded block header.

Parameters:

• {Object} params - Params object.
• {string} params.hash - Hash from a block

[ Example ] [ Top ]

import { blocks } from 'esplora-js';
...
const blockHeader = await blocks.getBlockHeader({
  hash: '000000000000000015dc...'
});
console.log(blockStatus);

Get Block Txs

Returns a list of transactions in the block (up to 25 transactions beginning at start_index).

Parameters:

• {Object} params - Params object.
• {string} params.hash - Hash from a block
• {number} params.start_index - Default: 25

[ Example ] [ Top ]

import { blocks } from 'esplora-js';
...
const blockTxs = await blocks.getBlockTxs({
  hash: '000000000000000015dc...'
});
console.log(blockTxs);

Get Block Txids

Returns a list of all txids in the block.

Parameters:

• {Object} params - Params object.
• {string} params.hash - Hash from a block

[ Example ] [ Top ]

import { blocks } from 'esplora-js';
...
const blockTxids = await blocks.getBlockTxids({
  hash: '000000000000000015dc...'
});
console.log(blockTxids);

Get Block Txid

Returns the transaction at index :index within the specified block.

Parameters:

• {Object} params - Params object.
• {string} params.hash - Hash from a block
• {number} params.index - Index

[ Example ] [ Top ]

import { blocks } from 'esplora-js';
...
const blockTxid = await blocks.getBlockTxid({
  hash: '000000000000000015dc...',
  index: 218
});
console.log(blockTxids);

Get Block Raw

Returns the raw block representation in binary.

Parameters:

• {Object} params - Params object.
• {string} params.hash - Hash from a block

[ Example ] [ Top ]

import { blocks } from 'esplora-js';
...
const blockRaw = await blocks.getBlockRaw({
  hash: '000000000000000015dc...'
});
console.log(blockRaw);

Get Blocks Height

Returns the hash of the block currently at height.

Parameters:

• {Object} params - Params object.
• {number} params.height - Height from a block

[ Example ] [ Top ]

import { blocks } from 'esplora-js';
...
const blockHeight = await blocks.getBlockHeader({
  height: 66666,
});
console.log(blockHeight);

Get Blocks

Returns the 10 newest blocks starting at the tip or at start_height if specified.

Parameters:

• {Object} params - Params object.
• {number} params.start_height - Height from a block

[ Example ] [ Top ]

import { blocks } from 'esplora-js';
...
const getBlocks = await blocks.getBlocks({
  start_height: 66666
});
console.log(getBlocks);

Get Blocks Tip Height

Returns the height of the last block.

Parameters:

• {Object} params - Params object.
• {number} params.start_height - Height from a block

[ Example ] [ Top ]

import { blocks } from 'esplora-js';
...
const blocksTipHeight = await blocks.getBlocksTipHeight();
console.log(blocksTipHeight);

Get Blocks Tip Hash

Returns the hash of the last block.

Parameters:

• {Object} params - Params object.
• {number} params.start_height - Height from a block

[ Example ] [ Top ]

import { blocks } from 'esplora-js';
...
const blocksTipHash = await blocks.getBlocksTipHash();
console.log(blocksTipHash);

Get Tx

Returns information about the transaction.

Parameters:

• {Object} params - Params object.
• {string} params.txid - Transactions id.

[ Example ] [ Top ]

import { transactions } from 'esplora-js';
...
const tx = await transactions.getTx({
  txid: '15e10745f15593...'
});
console.log(tx);

Get Tx Status

Returns the transaction confirmation status.

Parameters:

• {Object} params - Params object.
• {string} params.txid - Transactions id.

[ Example ] [ Top ]

import { transactions } from 'esplora-js';
...
const txStatus = await transactions.getTxStatus({
  txid: '15e10745f15593...'
});
console.log(txStatus);

Get Tx Hex

Returns the transaction hex.

Parameters:

• {Object} params - Params object.
• {string} params.txid - Transactions id.

[ Example ] [ Top ]

import { transactions } from 'esplora-js';
...
const txHex = await transactions.getTxHex({
  txid: '15e10745f15593...'
});
console.log(txHex);

Get Tx Raw

Returns the raw transaction in hex or as binary data.

Parameters:

• {Object} params - Params object.
• {string} params.txid - Transactions id.

[ Example ] [ Top ]

import { transactions } from 'esplora-js';
...
const txRaw = await transactions.getTxRaw({
  txid: '15e10745f15593...'
});
console.log(txRaw);

Get Tx Merkle Block Proof

Returns a merkle inclusion proof for the transaction using bitcoind's merkleblock format.

Parameters:

• {Object} params - Params object.
• {string} params.txid - Transactions id.

[ Example ] [ Top ]

import { transactions } from 'esplora-js';
...
const txMerkleBlockProof = await transactions.getTxMerkleBlockProof({
  txid: '15e10745f15593...'
});
console.log(txMerkleBlockProof);

Get Tx Merkle Proof

Returns a merkle inclusion proof for the transaction using Electrum's blockchain.transaction.get_merkle format.

Parameters:

• {Object} params - Params object.
• {string} params.txid - Transactions id.

[ Example ] [ Top ]

import { transactions } from 'esplora-js';
...
const txMerkleProof = await transactions.getTxMerkleProof({
  txid: '15e10745f15593...'
});
console.log(txMerkleProof);

Get Tx Outspend

Returns the spending status of a transaction output.

Parameters:

• {Object} params - Params object.
• {string} params.txid - Transactions id.

[ Example ] [ Top ]

import { transactions } from 'esplora-js';
...
const txOutspend = await transactions.getTxOutspend({
  txid: '15e10745f15593...',
  vout: 3,
});
console.log(txOutspend);

Get Tx Outspends

Returns the spending status of all transaction outputs.

Parameters:

• {Object} params - Params object.
• {string} params.txid - Transactions id.

[ Example ] [ Top ]

import { transactions } from 'esplora-js';
...
const txOutspends = await transactions.getTxOutspends({
  txid: '15e10745f15593...'
});
console.log(txOutspends);

Post Tx Outspends

Broadcast a raw transaction to the network. The transaction should be provided as hex in the request body. The txid will be returned on success.

Parameters:

• {Object} params - Params object.
• {string} params.txid - Transactions id.

[ Example ] [ Top ]

import { transactions } from 'esplora-js';
...
const postTx = await transactions.postTx({
  txid: '15e10745f15593...'
});
console.log(postTx);

Get Address

Get information about an address.

Parameters:

• {Object} params - Params object.
• {string} params.address - Address id.

[ Example ] [ Top ]

import { addresses } from 'esplora-js';
...
const addressTest = await addresses.getAddress({
  address: '15e10745f15593a...'
});
console.log(addressTest);

Get Address Txs

Get transaction history for the specified address/scripthash, sorted with newest first.

Parameters:

• {Object} params - Params object.
• {string} params.address - Address id.

[ Example ] [ Top ]

import { addresses } from 'esplora-js';
...
const addressTxs = await addresses.getAddressTxs({
  address: '15e10745f15593a...'
});
console.log(addressTxs);

Get Address Txs Chain

Get confirmed transaction history for the specified address/scripthash, sorted with newest first.

Parameters:

• {Object} params - Params object.
• {string} params.address - Address id.

[ Example ] [ Top ]

import { addresses } from 'esplora-js';
...
const addressTxsChain = await addresses.getAddressTxsChain({
  address: '15e10745f15593a...'
});
console.log(addressTxsChain);

Get Address Txs Mempool

Get unconfirmed transaction history for the specified address/scripthash.

Parameters:

• {Object} params - Params object.

[ Example ] [ Top ]

import { addresses } from 'esplora-js';
...
const addressTxsMempool = await addresses.getAddressTxsMempool({
  address: '15e10745f15593a...'
});
console.log(addressTxsMempool);

Get Address Txs Utxo

Get the list of unspent transaction outputs associated with the address/scripthash.

Parameters:

• {Object} params - Params object.
• {string} params.address - Address id.

[ Example ] [ Top ]

import { addresses } from 'esplora-js';
...
const addressTxsUtxo = await addresses.getAddressTxsUtxo({
  address: '15e10745f15593a...'
});
console.log(addressTxsUtxo);

Get Asset (Liquid Only)

Get information about an asset.

Parameters:

• {Object} params - Params object.
• {string} params.asset_id - Asset id.

[ Example ] [ Top ]

import { assets } from 'esplora-js';
...
const asset = await assets.getAsset({
  asset_id: '6f0279e9ed04...'
});
console.log(asset);

Get Asset Txs (Liquid Only)

Get information about an asset txs.

Parameters:

• {Object} params - Params object.
• {string} params.asset_id - Asset id.

[ Example ] [ Top ]

import { assets } from 'esplora-js';
...
const asset = await assets.getAssetTxs({
  asset_id: `6f0279e9ed041c3d710a9f57d0c02928416460c4b722ae3457a11eec381c526d`,
});
console.log(asset);

Get Asset Txs Mempool (Liquid Only)

Get information about an asset mempool txs.

Parameters:

• {Object} params - Params object.
• {string} params.asset_id - Asset id.

[ Example ] [ Top ]

import { assets } from 'esplora-js';
...
const asset = await assets.getAssetTxsMempool({
  asset_id: `6f0279e9ed041c3d710a9f57d0c02928416460c4b722ae3457a11eec381c526d`,
});
console.log(asset);

Get Asset Txs Chain (Liquid Only)

Get information about an asset txs.

Parameters:

• {Object} params - Params object.
• {string} params.asset_id
• {string} params.last_seen

[ Example ] [ Top ]

import { assets } from 'esplora-js';
...
const asset = await assets.getAssetTxsChain({
  asset_id: `6f0279e9ed041c3d710a9f57d0c02928416460c4b722ae3457a11eec381c526d`,
});
console.log(asset);

Get Asset Supply (Liquid Only)

Get the current total supply of the specified asset.

Parameters:

• {Object} params - Params object.
• {string} params.asset_id - Asset id.

[ Example ] [ Top ]

import { assets } from 'esplora-js';
...
const asset = await assets.getAssetSupply({
  asset_id: `6f0279e9ed041c3d710a9f57d0c02928416460c4b722ae3457a11eec381c526d`,
});
console.log(asset);

Get Asset Supply Decimal (Liquid Only)

Get the current total supply of the specified asset.

Parameters:

• {Object} params - Params object.
• {string} params.asset_id - Asset id.
• {string} params.last_seen - Asset id.

[ Example ] [ Top ]

import { assets } from 'esplora-js';
...
const asset = await assets.getAssetSupplyDecimal({
  asset_id: `6f0279e9ed041c3d710a9f57d0c02928416460c4b722ae3457a11eec381c526d`,
});
console.log(asset);

Get Asset Registry (Liquid Only)

Get information about an asset mempool txs.

Parameters:

• {Object} params - Params object.
• {number} params.start_index
• {number} params.limit
• {string} params.sort_field
• {string} params.sort_dir

[ Example ] [ Top ]

import { assets } from 'esplora-js';
...
const asset = await assets.getAssetRegistry();
console.log(asset);

Contributing

Pull requests are welcome! For major changes, please open an issue first to discuss what you would like to change.

License MIT