• MerkleTree, MerkleFileProcessor, MerkleHash, and MerkleChain in TypeScript
• Created by: Lucas Armstrong - [email protected] - github.com/LucasArmstrong
• License: MIT

• In your project run:

• npm i https://github.com/LucasArmstrong/merkle-ts

• For TypeScript projects you can import the module MerkleTree
• For JavaScript projects you can build with:

• npm run build

• • Then require in your code like:

• • const {MerkleTree} = require('./node_modules/merkle-ts/dist/src/merkle/MerkleTree.js');

• • Example of using a merkle root in a jest test:

• • let tree = new MerkleTree([1]); expect(tree.root).toBe('6b86b273ff34fce19d6b804eff5a3f5747ada4eaa22f1d49c01e52ddb7875b4b');

• First set or export environment variable ASSET_DIRECTORY_PATH to the directory you want to process.
• Then run:

• npm run process

• Digests and calculates a Merkle Root for the entire specified directory and contents
• If you don't set the env var above, then the default directory is exampleAssets, the output should look like this:

• ------------------- Directory Processing Starting -------------------
  directoryPath = ./exampleAssets
  directory merkle root for ./exampleAssets: d52c8079ae7fdaf0c455451ec1b8b729fa8de64602012062679126c90586bd7d
  Directory processing complete in 0.024 seconds.

• Execute tests with:

• npm run test

• Runs a variety of tests proving that the MerkleTree class correctly calculates the merkle root for a set of data

In cryptography and computer science, a hash tree or Merkle tree is a tree in which every "leaf" (node) is labelled with the cryptographic hash of a data block, and every node that is not a leaf (called a branch, inner node, or inode) is labelled with the cryptographic hash of the labels of its child nodes. A hash tree allows efficient and secure verification of the contents of a large data structure. A hash tree is a generalization of a hash list and a hash chain.

• Read more at https://en.wikipedia.org/wiki/Merkle_tree

'RSA-MD4', 'RSA-MD5', 'RSA-MDC2', 'RSA-RIPEMD160', 'RSA-SHA1', 'RSA-SHA1-2', 'RSA-SHA224', 'RSA-SHA256', 'RSA-SHA3-224', 'RSA-SHA3-256', 'RSA-SHA3-384', 'RSA-SHA3-512', 'RSA-SHA384', 'RSA-SHA512', 'RSA-SHA512/224', 'RSA-SHA512/256', 'RSA-SM3', 'blake2b512', 'blake2s256', 'id-rsassa-pkcs1-v1_5-with-sha3-224', 'id-rsassa-pkcs1-v1_5-with-sha3-256', 'id-rsassa-pkcs1-v1_5-with-sha3-384', 'id-rsassa-pkcs1-v1_5-with-sha3-512', 'md4', 'md4WithRSAEncryption', 'md5', 'md5-sha1', 'md5WithRSAEncryption', 'mdc2', 'mdc2WithRSA', 'ripemd', 'ripemd160', 'ripemd160WithRSA', 'rmd160', 'sha1', 'sha1WithRSAEncryption', 'sha224', 'sha224WithRSAEncryption', 'sha256', 'sha256WithRSAEncryption', 'sha3-224', 'sha3-256', 'sha3-384', 'sha3-512', 'sha384', 'sha384WithRSAEncryption', 'sha512', 'sha512-224', 'sha512-224WithRSAEncryption', 'sha512-256', 'sha512-256WithRSAEncryption', 'sha512WithRSAEncryption', 'shake128', 'shake256', 'sm3', 'sm3WithRSAEncryption', 'ssl3-md5', 'ssl3-sha1', 'whirlpool'