feat(core): add util to create AssetId from PolicyId and AssetName

input-output-hk · May 20, 2022 · 99043cd · 99043cd
1 parent 5fa9d44
commit 99043cd
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diff --git a/packages/core/src/Asset/util/assetId.ts b/packages/core/src/Asset/util/assetId.ts
@@ -10,6 +10,15 @@ export const assetNameFromAssetId = (assetId: AssetId): AssetName => AssetName(a
 export const createAssetId = (scriptHash: CSL.ScriptHash, assetName: CSL.AssetName): AssetId =>
   AssetId(util.bytesToHex(scriptHash.to_bytes()) + util.bytesToHex(assetName.name()).toString());
 
+/**
+ * @returns {AssetId} concatenated policy id and asset name
+ */
+export const assetIdFromPolicyAndName = (policyId: PolicyId, assetName: AssetName): AssetId =>
+  createAssetId(
+    CSL.ScriptHash.from_bytes(Buffer.from(policyId, 'hex')),
+    CSL.AssetName.new(Buffer.from(assetName, 'hex'))
+  );
+
 export const parseAssetId = (assetId: AssetId) => {
   const policyId = policyIdFromAssetId(assetId);
   const assetName = assetNameFromAssetId(assetId);

diff --git a/packages/core/test/Asset/util/assetId.test.ts b/packages/core/test/Asset/util/assetId.test.ts
@@ -1,5 +1,11 @@
 import { AssetId } from '../../../src/Cardano';
-import { createAssetId, parseAssetId } from '../../../src/Asset/util';
+import {
+  assetIdFromPolicyAndName,
+  assetNameFromAssetId,
+  createAssetId,
+  parseAssetId,
+  policyIdFromAssetId
+} from '../../../src/Asset/util';
 
 describe('Asset', () => {
   describe('util', () => {
@@ -12,5 +18,13 @@ describe('Asset', () => {
       );
       expect(createAssetId(tsla.scriptHash, tsla.assetName)).toEqual(assetId);
     });
+    it('policyIdFromAssetId, assetNameFromAssetId and assetIdFromPolicyAndName', async () => {
+      const assetId = AssetId('659f2917fb63f12b33667463ee575eeac1845bbc736b9c0bbc40ba8254534c41');
+      const [policyId, assetName] = [policyIdFromAssetId(assetId), assetNameFromAssetId(assetId)];
+
+      expect(policyId).toEqual('659f2917fb63f12b33667463ee575eeac1845bbc736b9c0bbc40ba82');
+      expect(assetName).toEqual('54534c41');
+      expect(assetIdFromPolicyAndName(policyId, assetName)).toEqual(assetId);
+    });
   });
 });