Feat/vh capped oracles

deploy/30-deploy-vh-erc4626-oracles.ts

@@ -0,0 +1,44 @@
+import { ethers } from "hardhat";
+import { DeployFunction } from "hardhat-deploy/dist/types";
+import { HardhatRuntimeEnvironment } from "hardhat/types";
+
+import { ADDRESSES } from "../helpers/deploymentConfig";
+
+// Venus Hub receipt tokens: 24-decimal ERC4626 vaults over USDT, USDC and U.
+const VAULTS = [
+  { vault: "vhUSDT", asset: "USDT" },
+  { vault: "vhUSDC", asset: "USDC" },
+  { vault: "vhU", asset: "U" },
+];
+
+// Only Hub_USDT is deployed on testnet, so only its oracle can be deployed there. It is named
+// after mainnet's vhUSDT to keep one deployment name per vault across networks, even though the
+// token itself predates the naming convention and is still "Vault Share" / vSHARE on chain.
+const TESTNET_VAULTS = [{ vault: "vhUSDT", asset: "USDT" }];
+
+const func: DeployFunction = async ({ getNamedAccounts, deployments, network }: HardhatRuntimeEnvironment) => {
+  const { deploy } = deployments;
+  const { deployer } = await getNamedAccounts();
+  const addresses = ADDRESSES[network.name];
+  const resilientOracle = await ethers.getContract("ResilientOracle");
+  const vaults = network.name === "bsctestnet" ? TESTNET_VAULTS : VAULTS;
+
+  // Cap arguments (annual growth rate, snapshot interval, initial snapshot, snapshot timestamp and
+  // snapshot gap) are all deployed zeroed. VIP-664 arms the cap afterwards with setSnapshot,
+  // setGrowthRate and setSnapshotGap, the same way VIP-530 armed the asBNB oracle.
+  for (const { vault, asset } of vaults) {
+    await deploy(`${vault}_ERC4626Oracle`, {
+      contract: "ERC4626Oracle",
+      from: deployer,
+      log: true,
+      deterministicDeployment: false,
+      skipIfAlreadyDeployed: true,
+      args: [addresses[vault], addresses[asset], resilientOracle.address, 0, 0, 0, 0, addresses.acm, 0],
+    });
+  }
+};
+
+export default func;
+func.tags = ["vh-erc4626-oracles"];
+func.skip = async (hre: HardhatRuntimeEnvironment) =>
+  hre.network.name !== "bscmainnet" && hre.network.name !== "bsctestnet";