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- var crypto = require("crypto");
-
- exports.createCoinbase = createCoinbase;
- exports.createCbHash = createCbHash;
- exports.buildMerkleRoot = buildMerkleRoot;
- exports.doublesha = doublesha;
- exports.incbufBE = incbufBE;
-
- /* Create a coinbase buffer.
- *
- * Args:
- * cb1, cb2: Buffer, coinbase parts 1 and 2
- * ex1, ex2: Buffer, extranounce 1 and 2
- *
- * Returns:
- * Buffer, a complete coinbase
- */
- function createCoinbase(ex1, ex2, cb1, cb2) {
- return Buffer.concat([ cb1, ex1, ex2, cb2 ]);
- }
-
- /* Create a coinbase hash.
- *
- * Args:
- * coinbase: Buffer, the coinbase
- *
- * Returns:
- * Buffer, the cbHashBin
- */
- function createCbHash(coinbase) {
- return doublesha(coinbase);
- }
-
- /* Build a merkle root from a merkle branch and a coinbase hash.
- *
- * Returns:
- * Buffer, the merkle root
- *
- * Args:
- * merkleBranch: Array, hex encoded hashes
- * cbHash: Buffer, the coinbase hash
- */
- function buildMerkleRoot(merkleBranch, cbHash) {
- var root = cbHashBin
- for (var i in merkleBranch) {
- var h = Buffer.from(merkleBranch[i], "hex");
- root = doublesha(Buffer.concat(root, h));
- }
-
- return root;
- }
-
- function hashLbry(blockHeader){
- //double sha256
- var hash = doublesha(blockHeader)
-
- // sha 512
-
-
- //ripemd160
-
- // double sha256
-
- return hash;
- }
-
- /* Run sha256 twice on a buffer.
- *
- * Returns:
- * Buffer, the double-sha256'd buffer
- *
- * Args:
- * buf: Buffer, will be double-sha256'd
- */
- function doublesha(buf) {
- var tmp = crypto.createHash("sha256").update(buf).digest();
- return crypto.createHash("sha256").update(tmp).digest();
- }
-
- /* Increment a buffer.
- *
- * Args:
- * buf: Buffer, will be incremented.
- */
- function incbufBE(buf) {
- for (var i = buf.length - 1; i >= 0; --i) {
- if (buf[i]++ !== 255)
- break;
- }
- }
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