add base 58

test/spec/b58.js

@@ -0,0 +1,62 @@
+'use strict';
+
+const b58 = require ('b58');
+
+// eslint-disable-next-line max-lines-per-function
+describe ('b58', () => {
+  it ('should encode "Hello World!"', () => {
+    const enc = b58.encode (Buffer.from ('Hello World!', 'utf-8'));
+    expect (enc)
+      .toEqual ('2NEpo7TZRRrLZSi2U');
+  });
+
+  it ('should encode "The quick brown fox.."', () => {
+    const enc = b58.encode (Buffer.from (
+      'The quick brown fox jumps over the lazy dog.',
+      'utf-8'
+    ));
+    expect (enc)
+      .toEqual ('USm3fpXnKG5EUBx2ndxBDMPVciP5hGey2Jh4NDv6gmeo1LkMeiKrLJUUBk6Z');
+  });
+
+  it ('should encode test hex string', () => {
+    const enc = b58.encode (Buffer.from ('0000287fb4cd', 'hex'));
+    expect (enc)
+      .toEqual ('11233QC4');
+  });
+
+  it ('should decode "Hello World!"', () => {
+    const dec = b58.decode ('2NEpo7TZRRrLZSi2U')
+      .toString ('utf-8');
+    expect (dec)
+      .toEqual ('Hello World!');
+  });
+
+  it ('should decode "The quick brown fox.."', () => {
+    const dec = b58.decode (
+      'USm3fpXnKG5EUBx2ndxBDMPVciP5hGey2Jh4NDv6gmeo1LkMeiKrLJUUBk6Z'
+    )
+      .toString ('utf-8');
+    expect (dec)
+      .toEqual ('The quick brown fox jumps over the lazy dog.');
+  });
+
+  it ('should decode test hex string', () => {
+    const dec = b58.decode ('11233QC4')
+      .toString ('hex');
+    expect (dec)
+      .toEqual ('0000287fb4cd');
+  });
+
+  it ('should encode any byte combination', () => {
+    for (let i = 0; i < 65536; i++) {
+      const buf = Buffer.alloc (2);
+      buf.writeUInt16BE (i);
+      const enc = b58.encode (buf);
+      const dec = b58.decode (enc)
+        .readUInt16BE ();
+      expect (dec)
+        .toEqual (i);
+    }
+  });
+});

test/spec/index.js

@@ -24,12 +24,24 @@ describe ('encoding', () => {
       .toEqual ('Zm9v');
   });
 
+  it ('encoding to_b58', () => {
+    const hex = encoding.to_b58 ('foo');
+    expect (hex)
+      .toEqual ('bQbp');
+  });
+
   it ('encoding to_utf8', () => {
     const utf = encoding.to_utf8 ('Zm9v', 'base64');
     expect (utf)
       .toEqual ('foo');
   });
 
+  it ('encoding to_utf8 from b58', () => {
+    const utf = encoding.to_utf8 ('bQbp', 'base58');
+    expect (utf)
+      .toEqual ('foo');
+  });
+
   it ('convert num to hex', () => {
     const res = encoding.num_to_hex (11);
     expect (res)
@@ -54,4 +66,3 @@ describe ('encoding', () => {
       .toEqual (11);
   });
 });
-