Holochain Zome Call Hashing
A Javascript WASM binding for creating a hash of Holochain zome call input which is required for zome call signing.
Install
npm i @whi/holochain-zome-call-hashingBasic Usage
Example of hashing zome call input and adding a signature.
const nacl = require('tweetnacl');
const { encode } = require('@msgpack/msgpack');
const { hashZomeCall } = require('@whi/holochain-zome-call-hashing');
const { AgentPubKey } = require('@whi/holo-hash');
const key_pair = nacl.sign.keyPair();
const zome_call_request = {
"cell_id": [ dna_hash, agent_hash ], // These are HoloHashes (aka Uint8Arrays)
"zome_name": "zome_name",
"fn_name": "function_name",
"payload": encode( Buffer.from("Super important bytes") ),
"cap": null,
"provenance": new AgentPubKey( key_pair.publicKey ),
"nonce": nacl.randomBytes( 32 ),
"expires_at": (Date.now() + (5 * 60 * 1_000)) * 1_000,
};
const zome_call_hash = await hashZomeCall( zome_call_request );
zome_call_request.signature = nacl.sign( zome_call_hash, key_pair.secretKey )
.subarray( 0, nacl.sign.signatureLength );Support for webpack
Use import() instead of require().
const { hashZomeCall } = await import('@whi/holochain-zome-call-hashing');Things you might need to add to a webpack config.
...
experiments: {
asyncWebAssembly: true,
},
resolve: {
mainFields: ["module", "main"],
},
...