libswarm-ng

C implementation of BMT hasher, Swarmhash and Single Owner Chunk for swarm
git clone git://git.defalsify.org/libswarm-ng.git
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bmt.js (928B)


      1 const fs = require('fs');
      2 
      3 const memory = new WebAssembly.Memory({initial: 3});
      4 const table = new WebAssembly.Table({initial: 10, element: 'anyfunc'});
      5 const importsObj = {
      6 	env: {
      7 		memory: memory,
      8 		dlog: function(prefix, l, value) {
      9 			const v = new Uint8Array(memory.buffer, prefix, l);
     10 			const s = new TextDecoder().decode(v);
     11 			console.log('log: ' +  s, value);
     12 		},
     13 	}
     14 }
     15 
     16 async function init() {
     17 	const code = fs.readFileSync('./lib/swarm.wasm');
     18 	const m = new WebAssembly.Module(code);
     19 	const i = new WebAssembly.Instance(m, importsObj);
     20 
     21 	let r;
     22 	let data = new Uint8Array(memory.buffer, 65535*2+1024, 3);
     23 	data.set([0x66, 0x6f, 0x6f], 0);
     24 	r = i.exports.bmt_hash_heap(65535*2+1024, 3, BigInt(3));
     25 
     26 	let outBuf = new Uint8Array(memory.buffer, r, 32);
     27 	let inBuf = new Uint8Array(memory.buffer, r + 32, 3);
     28 
     29 	i.exports.bmt_hash_free(r);
     30 
     31 	process.stdout.write(Buffer.from(outBuf).toString("hex") + "\n");
     32 }
     33 
     34 init();