Rebrand: polkadot → pezkuwi, substrate → bizinikiwi, kusama → dicle

packages/api-derive/src/crowdloan/util.ts

@@ -0,0 +1,33 @@
+// Copyright 2017-2025 @pezkuwi/api-derive authors & contributors
+// SPDX-License-Identifier: Apache-2.0
+
+import type { PezframeSystemEventRecord } from '@pezkuwi/types/lookup';
+import type { Vec } from '@pezkuwi/types-codec';
+import type { BN } from '@pezkuwi/util';
+
+interface Changes {
+  added: string[];
+  blockHash: string;
+  removed: string[];
+}
+
+export function extractContributed (paraId: string | number | BN, events: Vec<PezframeSystemEventRecord>): Changes {
+  const added: string[] = [];
+  const removed: string[] = [];
+
+  return events
+    .filter(({ event: { data: [, eventParaId], method, section } }) =>
+      section === 'crowdloan' &&
+      ['Contributed', 'Withdrew'].includes(method) &&
+      eventParaId.eq(paraId)
+    )
+    .reduce((result: Changes, { event: { data: [accountId], method } }): Changes => {
+      if (method === 'Contributed') {
+        result.added.push(accountId.toHex());
+      } else {
+        result.removed.push(accountId.toHex());
+      }
+
+      return result;
+    }, { added, blockHash: events.createdAtHash?.toHex() || '-', removed });
+}