refactor(experimental): implement createBase58AddressWithSeed

Author: 2501babe

packages/addresses/src/__tests__/base58-test.ts

@@ -5,6 +5,7 @@ import {
     Base58EncodedAddress,
     getBase58EncodedAddressCodec,
     getBase58EncodedAddressComparator,
+    getBase58EncodedAddressForSeed,
 } from '../base58';
 
 describe('base58', () => {
@@ -132,4 +133,15 @@ describe('base58', () => {
             ]);
         });
     });
+    describe('getBase58EncodedAddressForSeed', () => {
+        it('works', async () => {
+            const baseAddress = 'Bh1uUDP3ApWLeccVNHwyQKpnfGQbuE2UECbGA6M4jiZJ';
+            const programAddress = 'FGrddpvjBUAG6VdV4fR8Q2hEZTHS6w4SEveVBgfwbfdm';
+            const expectedAddress = 'HUKxCeXY6gZohFJFARbLE6L6C9wDEHz1SfK8ENM7QY7z';
+
+            const actualAddress = await getBase58EncodedAddressForSeed(baseAddress, 'seed', programAddress);
+
+            expect(actualAddress).toEqual(expectedAddress);
+        });
+    });
 });

packages/addresses/src/base58.ts

@@ -52,3 +52,14 @@ export function getBase58EncodedAddressComparator(): (x: string, y: string) => n
         usage: 'sort',
     }).compare;
 }
+
+export async function getBase58EncodedAddressForSeed(baseAddress: Base58EncodedAddress, seed: string, programAddress: Base58EncodedAddress): Promise<Base58EncodedAddress> {
+    const {serialize, deserialize } = getBase58EncodedAddressCodec();
+    const seedBytes = (new TextEncoder()).encode(seed);
+    const addressBytesBuffer = await crypto.subtle.digest(
+        'SHA-256',
+        new Uint8Array([...serialize(baseAddress), ...seedBytes, ...serialize(programAddress)])
+    );
+    const addressBytes = new Uint8Array(addressBytesBuffer);
+    return deserialize(addressBytes)[0];
+}