add basic bat adapter

protocols/basic.ts

@@ -0,0 +1,27 @@
+import { manualCliff, manualLinear } from "../adapters/manual";
+import { Protocol } from "../types/adapters";
+import { periodToSeconds } from "../utils/time";
+
+const start = 1496188800; // Wednesday, 31 May 2017 00:00:00
+const qty = 1500000000; // 1.5b
+const end = 1761868800 // 31 October 2025 00:00:00
+
+const basic: Protocol = {
+  "Investor": manualCliff(start, qty * 0.6667),
+  "User Growth Pool": manualCliff(start, qty * 0.20),
+  "Brave": [manualCliff(start + periodToSeconds.month, qty * 0.1333), manualCliff(end, qty * 0)],
+  meta: {
+    notes: [
+      `The supply of Basic Attention Token (BAT) has fully vested.`,
+    ],
+    token: "ethereum:0x0d8775f648430679a709e98d2b0cb6250d2887ef",
+    sources: ["https://basicattentiontoken.org/static-assets/documents/BasicAttentionTokenWhitePaper-4.pdf"],
+    protocolIds: ["3490"],
+  },
+  categories: {
+    insiders: [],
+    publicSale: ["Investor"],
+    farming: ["Brave", "User Growth Pool"]
+  },
+};
+export default basic;