@emurgo/cip14-js - npm Package Compare versions

Comparing version 1.0.2 to 2.0.0

index.d.ts

@@ -1,1 +0,10 @@
-export declare function assetFingerprint(policyId: Uint8Array, assetName: Uint8Array): string;
+/// <reference types="node" />
+export default class assetFingerprint {
+    hashBuf: Uint8Array;
+    constructor(policyId?: Uint8Array, assetName?: Uint8Array);
+    fromHash(hash: Buffer): this;
+    fromBech32(fingerprint: string): this;
+    fingerprint(): string;
+    hash(): string;
+    prefix(): string;
+}

index.js

@@ -6,12 +6,36 @@ "use strict";
 Object.defineProperty(exports, "__esModule", { value: true });
-exports.assetFingerprint = void 0;
 const blake2b_1 = __importDefault(require("blake2b"));
 const bech32_1 = require("bech32");
 /// note: this function can't be inverted due to the hash
-function assetFingerprint(policyId, assetName) {
-    // see https://github.com/cardano-foundation/CIPs/pull/64
-    const datapart = blake2b_1.default(20).update(new Uint8Array([...policyId, ...assetName])).digest('binary');
-    const words = bech32_1.bech32.toWords(datapart);
-    return bech32_1.bech32.encode('asset', words);
+const DATA = "asset";
+class assetFingerprint {
+    constructor(policyId = new Uint8Array(32), assetName = new Uint8Array(0)) {
+        // see https://github.com/cardano-foundation/CIPs/pull/64
+        this.hashBuf = blake2b_1.default(20)
+            .update(new Uint8Array([...policyId, ...assetName]))
+            .digest("binary");
+    }
+    fromHash(hash) {
+        this.hashBuf = hash;
+        return this;
+    }
+    fromBech32(fingerprint) {
+        const { prefix, words } = bech32_1.bech32.decode(fingerprint);
+        if (prefix !== DATA) {
+            throw new Error("Invalid asset fingerprint");
+        }
+        this.hashBuf = Buffer.from(bech32_1.bech32.fromWords(words));
+        return this;
+    }
+    fingerprint() {
+        const words = bech32_1.bech32.toWords(this.hashBuf);
+        return bech32_1.bech32.encode(DATA, words);
+    }
+    hash() {
+        return Buffer.from(this.hashBuf).toString('hex');
+    }
+    prefix() {
+        return DATA;
+    }
 }
-exports.assetFingerprint = assetFingerprint;
+exports.default = assetFingerprint;

package.json

 {
   "name": "@emurgo/cip14-js",
-  "version": "1.0.2",
+  "version": "2.0.0",
   "description": "A Javascript library reference implementation for CIP14",
@@ -22,3 +22,3 @@ "main": "./index.js",
   },
-  "license": "Apache-2.0",
+  "license": "Apache-2.0 OR MIT",
   "repository": {
@@ -25,0 +25,0 @@ "type": "git",

README.md

@@ -8,1 +8,27 @@ # CIP14-JS
 This package is a Typescript implementation of CIP14
+
+## Install
+
+``` sh
+npm i @emurgo/cip14-js --save
+```
+
+## Usage
+
+```js
+const AssetFingerprint = require('@emurgo/cip14-js');
+
+// initialize class with policyId, assetName
+const assetFingerprint = new AssetFingerprint(Buffer.from('1e349c9bdea19fd6c147626a5260bc44b71635f398b67c59881df209', 'hex'), Buffer.from('504154415445', 'hex'));
+
+const fingerprintHash = assetFingerprint.hash();
+const bech32Fingerprint = assetFingerprint.fingerprint();
+```
+
+```js
+// initialize class with bech32
+const assetFingerprint = new AssetFingerprint().fromBech32('asset1rjklcrnsdzqp65wjgrg55sy9723kw09mlgvlc3');
+
+const fingerprintHash = assetFingerprint.hash();
+const prefix = assetFingerprint.prefix();
+```

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Improved metrics

Total package byte prevSize

4829

increased by53.59%

Lines of code

50

increased by194.12%

Number of lines in readme file

34

increased by325%

No dependency changes