Merkle proof for a Bitcoin transaction.
npm install bitcoin-proof
getProof(String[] txIds, Number txIndex)getTxMerkle({txId: String, txIndex: Number, sibling: String[]})getMerkleRoot(String[] txIds)
#####getProof(String[] txIds, Number txIndex) -> {txId: String, txIndex: Number, sibling: String[]}
Computes the Merkle proof of a given transaction.
txIds- array of transaction hashes (as hex string)txIndex- index of which transaction to compute a Merkle proof for
Returns an object with the following keys:
txId- transaction hash that the Merkle proof is computed fortxIndex- index oftxIdamongtxIdssibling- sibling hashes oftxIdwhich comprise the Merkle proof
#####getTxMerkle({txId: String, txIndex: Number, sibling: String[]}) -> String
Computes the Merkle root of a given proof.
proof- an object of the form returned bygetProof
Returns the Merkle root as a hex string.
#####getMerkleRoot(String[] txIds) -> String
Computes the Merkle root of a set of transactions.
txIds- array of transaction hashes (as hex string)
Returns the Merkle root as a hex string.
varbtcProof=require('bitcoin-proof');varBLOCK_100K_TRANSACTIONS=['8c14f0db3df150123e6f3dbbf30f8b955a8249b62ac1d1ff16284aefa3d06d87','fff2525b8931402dd09222c50775608f75787bd2b87e56995a7bdd30f79702c4','6359f0868171b1d194cbee1af2f16ea598ae8fad666d9b012c8ed2b79a236ec4','e9a66845e05d5abc0ad04ec80f774a7e585c6e8db975962d069a522137b80c1d'];varproofOfFirstTx=btcProof.getProof(BLOCK_100K_TRANSACTIONS,0);// {// txId: '8c14f0db3df150123e6f3dbbf30f8b955a8249b62ac1d1ff16284aefa3d06d87',// txIndex: 0,// sibling: [// 'fff2525b8931402dd09222c50775608f75787bd2b87e56995a7bdd30f79702c4',// '8e30899078ca1813be036a073bbf80b86cdddde1c96e9e9c99e9e3782df4ae49'// ]// }varproofOfLastTx=btcProof.getProof(BLOCK_100K_TRANSACTIONS,3);// {// txId: 'e9a66845e05d5abc0ad04ec80f774a7e585c6e8db975962d069a522137b80c1d',// txIndex: 0,// sibling: [// '6359f0868171b1d194cbee1af2f16ea598ae8fad666d9b012c8ed2b79a236ec4',// 'ccdafb73d8dcd0173d5d5c3c9a0770d0b3953db889dab99ef05b1907518cb815'// ]// }