Add the O token (#389)

add the O token

src/tokens/o.ts

@@ -0,0 +1,19 @@
+import { defaultFetcherOptions, SupplyFetcher } from "../types";
+import { getAmountInAddresses, getBlockFrostInstance } from "../utils";
+
+const O = "2852268cf6e2db42e20f2fd3125f541e5d6c5a3d70b4dda17c2daa82";
+
+const fetcher: SupplyFetcher = async (options = defaultFetcherOptions) => {
+  const blockFrost = getBlockFrostInstance(options);
+  const total = 25e6;
+  const treasuryRaw = await getAmountInAddresses(blockFrost, O, [
+    "stake178j4fcxw7pwgxw92yu28c2zqmjxnumumj52hxr9jtr6qwngf2ve5n", // O Vesting Multisig
+  ]);
+  const treasury = Number(treasuryRaw) / 1e6;
+  return {
+    circulating: (total - treasury).toString(),
+    total: total.toString(),
+  };
+};
+
+export default fetcher;