chore: add circulating supply script

Signed-off-by: Gregory Hill <[email protected]>

scripts/circulating-supply.ts

@@ -0,0 +1,97 @@
+/* eslint @typescript-eslint/no-var-requires: "off" */
+import { createSubstrateAPI } from "../src/factory";
+import { ApiPromise } from "@polkadot/api";
+import { cryptoWaitReady, blake2AsHex } from "@polkadot/util-crypto";
+import fetch from "cross-fetch";
+import BN from "bn.js";
+import { assert } from "console";
+
+main().catch((err) => {
+    console.log("Error thrown by script:");
+    console.log(err);
+});
+
+async function main(): Promise<void> {
+    await cryptoWaitReady();
+
+    const paraApi = await createSubstrateAPI("wss://api.interlay.io/parachain");
+    // const paraApi = await createSubstrateAPI("wss://api-kusama.interlay.io/parachain");
+
+    const nativeCurrencyId = { Token: "INTR" };
+    const totalIssuance = await paraApi.query.tokens.totalIssuance(nativeCurrencyId);
+
+    const allBalances = await paraApi.query.tokens.accounts.entries();
+    const allNativeBalances = allBalances.filter(([{ args: [_account, currencyId] }, _value]) => {
+        if (currencyId.isToken) {
+            return currencyId.asToken.isIntr;
+        }
+        return false;
+    });
+
+    const totalFree = allNativeBalances
+        .map(value => (value[1] as any).free.toBn())
+        .reduce((acc: BN, r) => acc.add(r), new BN(0));
+    const totalReserved = allNativeBalances
+        .map(value => (value[1] as any).reserved.toBn())
+        .reduce((acc: BN, r) => acc.add(r), new BN(0));
+    const totalFrozen = allBalances
+        .map(value => (value[1] as any).frozen.toBn())
+        .reduce((acc: BN, r) => acc.add(r), new BN(0));
+
+    console.log(`Total Issuance: ${totalIssuance.toString()}`);
+    console.log(`Total Free: ${totalFree.toString()}`);
+    console.log(`Total Reserved: ${totalReserved.toString()}`);
+    console.log(`Total Frozen: ${totalFrozen.toString()}`);
+
+    assert(totalFree.add(totalReserved).eq(totalIssuance));
+
+    const liquidityPairs = await paraApi.query.dexGeneral.liquidityPairs.entries();
+    const lpTokens = liquidityPairs.map(([_key, value]) => value.unwrap());
+
+    const systemAccounts = [
+        "5Fhn5mX4JGeDxikaxkJZYRYjxxbZ7DjxS5f9hsAVAzGXUNyG",
+        "5GgS9vsF77Y7p2wZLEW1CW7vZpq8DSoXCf2sTdBoB51jpuan",
+        "5GDzXqLxGiJV6A7mDp1SGRV6DB8xnnwauMEwR7PL4PW122FM",
+        "5FgimgwW2s4V14NniQ6Nt145Sksb83xohW5LkMXYnMw3Racp",
+        Buffer.concat([Buffer.from("modl"), Buffer.from("mod/fees")], 32),
+        Buffer.concat([Buffer.from("modl"), Buffer.from("mod/supl")], 32),
+        Buffer.concat([Buffer.from("modl"), Buffer.from("esc/annu")], 32),
+        Buffer.concat([Buffer.from("modl"), Buffer.from("vlt/annu")], 32),
+        Buffer.concat([Buffer.from("modl"), Buffer.from("mod/trsy")], 32),
+        Buffer.concat([Buffer.from("modl"), Buffer.from("col/slct")], 32),
+        Buffer.concat([Buffer.from("modl"), Buffer.from("mod/vreg")], 32),
+        Buffer.concat([Buffer.from("modl"), Buffer.from("mod/loan")], 32),
+        Buffer.concat([Buffer.from("modl"), Buffer.from("mod/farm")], 32),
+        Buffer.concat([
+            Buffer.from("modl"),
+            Buffer.from("mod/loan"),
+            Buffer.from("farming")
+        ], 32),
+        Buffer.concat([
+            Buffer.from("modl"),
+            Buffer.from("mod/loan"),
+            Buffer.from("incentive")
+        ], 32),
+        ...lpTokens.map(currencyId => Buffer.concat([
+            Buffer.from("modl"),
+            Buffer.from("mod/farm"),
+            currencyId.toU8a(),
+        ], 32))
+    ];
+
+    const systemAccountBalances = await Promise.all(
+        systemAccounts.map(account =>
+            paraApi.query.tokens.accounts(account, nativeCurrencyId)
+        )
+    );
+
+    const systemAccountSupply = systemAccountBalances
+        .reduce((acc: BN, accountData) => acc.add(accountData.free), new BN(0));
+    console.log(`System Account Supply: ${systemAccountSupply.toString()}`);
+
+    // circulating = total_issuance - total_locked - total_reserved - system_account_supply
+    const circulating = totalIssuance.sub(totalFrozen).sub(totalReserved).sub(systemAccountSupply);
+    console.log(`Circulating: ${circulating.toString()}`);
+
+    await paraApi.disconnect();
+}