fix: performance improvement conversion

Author: jacobheun

src/convert.js

@@ -126,7 +126,7 @@ function buf2str (buf) {
 
 function mh2buf (hash) {
   // the address is a varint prefixed multihash string representation
-  const mh = bs58.decode((new CID(hash)).toString('base58btc'))
+  const mh = new CID(hash).multihash
   const size = Buffer.from(varint.encode(mh.length))
   return Buffer.concat([size, mh])
 }

test/index.spec.js

@@ -356,6 +356,13 @@ describe('variants', () => {
     expect(addr.toString()).to.equal(str)
   })
 
+  it('p2p', () => {
+    const str = '/p2p/bafzbeidt255unskpefjmqb2rc27vjuyxopkxgaylxij6pw35hhys4vnyp4'
+    const addr = multiaddr(str)
+    expect(addr).to.have.property('buffer')
+    expect(addr.toString()).to.equal('/p2p/QmW8rAgaaA6sRydK1k6vonShQME47aDxaFidbtMevWs73t')
+  })
+
   it('ipfs', () => {
     const str = '/ipfs/QmcgpsyWgH8Y8ajJz1Cu72KnS5uo2Aa2LpzU7kinSupNKC'
     const addr = multiaddr(str)