pear uses their own merkle hash using blake 2b because it is faster than blake3 https://github.com/holepunchto/hypercore/blob/main/lib/merkle-tree.js
https://github.com/holepunchto/hypercore-crypto/blob/main/index.js
blake2b as crypto_generichash from libsodium https://libsodium.gitbook.io/doc/hashing/generic_hashing