feat: accounts (#76)

* feat: accounts

* fix: remove unused types

* fix: state

package.json

@@ -25,6 +25,7 @@
   },
   "dependencies": {
     "@blockfrost/openapi": "^0.1.22",
+    "@emurgo/cardano-serialization-lib-nodejs": "^7.1.0",
     "@yarnpkg/pnpify": "3.0.0-rc.6",
     "axios": "^0.21.1",
     "dotenv": "^10.0.0",

src/account/index.ts

@@ -0,0 +1,26 @@
+import {
+  Bip32PublicKey,
+  BaseAddress,
+  NetworkInfo,
+  StakeCredential,
+} from '@emurgo/cardano-serialization-lib-nodejs';
+
+export const deriveAddress = (
+  publicKey: string,
+  addressIndex: number,
+  type = 1 | 0,
+): { address: string; path: string } => {
+  const accountKey = Bip32PublicKey.from_bytes(Buffer.from(publicKey, 'hex'));
+  const utxoPubKey = accountKey.derive(type).derive(addressIndex);
+  const stakeKey = accountKey.derive(2).derive(0);
+  const baseAddr = BaseAddress.new(
+    NetworkInfo.mainnet().network_id(),
+    StakeCredential.from_keyhash(utxoPubKey.to_raw_key().hash()),
+    StakeCredential.from_keyhash(stakeKey.to_raw_key().hash()),
+  );
+
+  return {
+    address: baseAddr.to_address().to_bech32(),
+    path: `m/1852'/1815'/0'/${type}/${addressIndex}`,
+  };
+};

src/config.ts

@@ -7,3 +7,5 @@ export const DEFAULT_API_VERSION = 0;
 export const DEFAULT_ORDER: 'asc' | 'desc' = 'asc';
 export const DEFAULT_PAGINATION_PAGE_COUNT = 1;
 export const DEFAULT_PAGINATION_PAGE_ITEMS_COUNT = 100;
+
+export const ADDRESS_GAP_LIMIT = 20;

yarn.lock

@@ -681,6 +681,7 @@ __metadata:
   resolution: "@blockfrost/blockfrost-js@workspace:."
   dependencies:
     "@blockfrost/openapi": ^0.1.22
+    "@emurgo/cardano-serialization-lib-nodejs": ^7.1.0
     "@types/jest": ^26.0.23
     "@types/node": ^15.12.4
     "@types/url-join": ^4.0.0
@@ -720,6 +721,13 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@emurgo/cardano-serialization-lib-nodejs@npm:^7.1.0":
+  version: 7.1.0
+  resolution: "@emurgo/cardano-serialization-lib-nodejs@npm:7.1.0"
+  checksum: 7ea9089cdddc39a5a74c68229bed19cd7222682a6d5833e24b4c614e36a284e968a3517a7ea4cb2c792a121ba22fd419bde79c37cb6d7a3db26f7af410f7c0f5
+  languageName: node
+  linkType: hard
+
 "@eslint/eslintrc@npm:^0.4.2":
   version: 0.4.2
   resolution: "@eslint/eslintrc@npm:0.4.2"