Merge pull request #278 from Define101/master

BlackRock USD adapter and listing

Author: Define101

src/adapters/peggedAssets/blackrock-usd/index.ts

@@ -0,0 +1,58 @@
+const sdk = require("@defillama/sdk");
+import { sumSingleBalance } from "../helper/generalUtil";
+import {
+  ChainBlocks,
+  PeggedIssuanceAdapter,
+  Balances,
+} from "../peggedAsset.type";
+
+type ChainContracts = {
+  [chain: string]: {
+    [contract: string]: string[];
+  };
+};
+
+const chainContracts: ChainContracts = {
+  ethereum: {
+    issued: [
+      "0x7712c34205737192402172409a8F7ccef8aA2AEc",
+    ],
+  },
+};
+
+async function chainMinted(chain: string, decimals: number) {
+  return async function (
+    _timestamp: number,
+    _ethBlock: number,
+    _chainBlocks: ChainBlocks
+  ) {
+    let balances = {} as Balances;
+    for (let issued of chainContracts[chain].issued) {
+      const totalSupply = (
+        await sdk.api.abi.call({
+          abi: "erc20:totalSupply",
+          target: issued,
+          block: _chainBlocks?.[chain],
+          chain: chain,
+        })
+      ).output;
+      sumSingleBalance(
+        balances,
+        "peggedUSD",
+        totalSupply / 10 ** decimals,
+        "issued",
+        false
+      );
+    }
+    return balances;
+  };
+}
+
+const adapter: PeggedIssuanceAdapter = {
+  ethereum: {
+    minted: chainMinted("ethereum", 6),
+    unreleased: async () => ({}),
+  },
+};
+
+export default adapter;

src/adapters/peggedAssets/index.ts

@@ -170,6 +170,7 @@ import fxusd from "./fxusd";
 import euro3 from "./euro3";
 import hai from "./let-s-get-hai";
 import usdbblast from "./usdb"  
+import buidl from "./blackrock-usd"
 
 export default {
   tether,
@@ -343,5 +344,6 @@ export default {
    "f-x-protocol-usd": fxusd,
    euro3, //since its the real coingecko id + same symbol we good with this. I think no need to "euro3": euro3 
    "let-s-get-hai": hai,
-   "usdb": usdbblast
+   "usdb": usdbblast,
+   "blackrock-usd-institutional-digital-liquidity-fund": buidl
 };

src/peggedData/peggedData.ts

@@ -3465,4 +3465,24 @@ export default [
     twitter: "https://twitter.com/Blast_L2",
     wiki: null,
   },
+  {
+    id: "173",
+    name: "BlackRock USD",
+    address: "0x7712c34205737192402172409a8F7ccef8aA2AEc",
+    symbol: "BUIDL", 
+    url: "https://www.blackrock.com/",
+    description:
+      "The BlackRock USD Institutional Digital Liquidity Fund is represented by the blockchain-based BUIDL token, is fully backed by cash, U.S. Treasury bills, and repurchase agreements, and will provide yield paid out via blockchain rails every day to token holders, according to a press release.",
+    mintRedeemDescription:
+      "BUIDL seeks to offer a stable value of $1 per token and pays daily accrued dividends directly to investors' wallets as new tokens each month. The Fund invests 100% of its total assets in cash, U.S. Treasury bills, and repurchase agreements, allowing investors to earn yield while holding the token on the blockchain. Investors can transfer their tokens 24/7/365 to other pre-approved investors. Fund participants will also have flexible custody options allowing them to choose how to hold their tokens.",
+    onCoinGecko: "true",
+    gecko_id: "blackrock-usd-institutional-digital-liquidity-fund",
+    cmcId: null,
+    pegType: "peggedUSD",
+    pegMechanism: "fiat-backed",
+    priceSource: "coingecko",
+    auditLinks: [],
+    twitter: "https://twitter.com/BlackRock",
+    wiki: null,
+  },
 ] as PeggedAsset[];