Merge pull request #150 from Define101/master

add USDM adapter

src/adapters/peggedAssets/usdm/index.ts

@@ -0,0 +1,85 @@
+const sdk = require("@defillama/sdk");
+import { sumSingleBalance } from "../helper/generalUtil";
+import {
+  ChainBlocks,
+  PeggedIssuanceAdapter,
+  Balances,
+} from "../peggedAsset.type";
+
+type ChainContracts = {
+  [chain: string]: {
+    issued: string;
+    unreleased: string[];
+  };
+};
+
+const chainContracts: ChainContracts = {
+  ethereum: {
+    issued: "0x59d9356e565ab3a36dd77763fc0d87feaf85508c",
+    unreleased: [],
+  },
+};
+
+async function chainMinted(chain: string, decimals: number) {
+  return async function (
+    _timestamp: number,
+    _ethBlock: number,
+    _chainBlocks: ChainBlocks
+  ) {
+    let balances = {} as Balances;
+    const totalSupply = (
+      await sdk.api.abi.call({
+        abi: "erc20:totalSupply",
+        target: chainContracts[chain].issued,
+        block: _chainBlocks?.[chain],
+        chain: chain,
+      })
+    ).output;
+    sumSingleBalance(
+      balances,
+      "peggedUSD",
+      totalSupply / 10 ** decimals,
+      "issued",
+      false
+    );
+    return balances;
+  };
+}
+
+async function chainUnreleased(chain: string, decimals: number) {
+  return async function (
+    _timestamp: number,
+    _ethBlock: number,
+    _chainBlocks: ChainBlocks
+  ) {
+    let balances = {} as Balances;
+    for (let unreleased of chainContracts[chain].unreleased) {
+      const unreleasedBalance = (
+        await sdk.api.abi.call({
+          abi: "erc20:balanceOf",
+          target: chainContracts[chain].issued,
+          params: [unreleased],
+          block: _chainBlocks?.[chain],
+          chain: chain,
+        })
+      ).output;
+      sumSingleBalance(
+        balances,
+        "peggedUSD",
+        unreleasedBalance / 10 ** decimals,
+        "unreleased",
+        false
+      );
+    }
+    return balances;
+  };
+}
+
+const adapter: PeggedIssuanceAdapter = {
+    ethereum: {
+      minted: chainMinted("ethereum", 18),
+      unreleased: async () => ({}),
+    },
+  };
+
+export default adapter;