VIP-130- PSM_USDT Deployment and VAI BaseRate => 2.72%

simulations/vip-131/utils.ts

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+import { expect } from "chai";
+import { BigNumber, Signer } from "ethers";
+import { parseUnits } from "ethers/lib/utils";
+import { ethers } from "hardhat";
+
+const MANTISSA_ONE = parseUnits("1", 18);
+const BASIS_POINT_DIVISOR = BigNumber.from(10000);
+export async function swapStableForVAIAndValidate(
+  psm: ethers.Contract,
+  stableToken: ethers.Contract,
+  stableTokenPrice: BigNumber,
+  tokenSigner: Signer,
+  tokenHolder: string,
+  VAI: ethers.Contract,
+  feeIn: BigNumber,
+  tokenDecimals: number,
+  oneDollar: BigNumber,
+) {
+  const stableTokenAmount = parseUnits("1000", tokenDecimals);
+  // calculate price of stableToken in USD, applying MIN(1$, oracle_price) thus capping stableToken maximum price to 1$
+  const feeInTokenPrice = stableTokenPrice.gt(oneDollar) ? oneDollar : stableTokenPrice;
+  const stableTokenAmountUSD = stableTokenAmount.mul(feeInTokenPrice).div(MANTISSA_ONE);
+  const fee = stableTokenAmountUSD.mul(feeIn).div(BASIS_POINT_DIVISOR);
+  const vaiToMint = stableTokenAmountUSD.sub(fee);
+  await stableToken.connect(tokenSigner).approve(psm.address, stableTokenAmount);
+  const vaiBalanceBefore = await VAI.balanceOf(tokenHolder);
+  const tx = await psm.connect(tokenSigner).swapStableForVAI(tokenHolder, stableTokenAmount);
+  const vaiBalanceAfter = await VAI.balanceOf(tokenHolder);
+  const vaiBalance = vaiBalanceAfter.sub(vaiBalanceBefore);
+  expect(vaiBalance).to.equal(vaiToMint);
+  await expect(tx).to.emit(psm, "StableForVAISwapped").withArgs(stableTokenAmount, vaiToMint, fee);
+}
+
+export async function swapVAIForStableAndValidate(
+  psm: ethers.Contract,
+  stableTokenPrice: BigNumber,
+  VAI: ethers.Contract,
+  vaiSigner: Signer,
+  feeOut: BigNumber,
+  stableToken: ethers.Contract,
+  tokenDecimals: number,
+  oneDollar: BigNumber,
+) {
+  const tokenAmount = parseUnits("100", tokenDecimals); // token amount to receive
+  // calculate price of stableToken in USD, applying MAX(1$, oracle_price) thus making stableToken minimum price to 1$
+  const feeOutTokenPrice = stableTokenPrice.gt(oneDollar) ? stableTokenPrice : oneDollar;
+  const tokenAmountUsd: BigNumber = tokenAmount.mul(feeOutTokenPrice).div(MANTISSA_ONE); // vai to burn
+  const fee = tokenAmountUsd.mul(feeOut).div(BASIS_POINT_DIVISOR);
+  await VAI.connect(vaiSigner).approve(psm.address, tokenAmountUsd.add(fee));
+  const vaiSignerAddress = await vaiSigner.getAddress();
+  const tokenBalanceBefore = await stableToken.balanceOf(vaiSignerAddress);
+  const tx = await psm.connect(vaiSigner).swapVAIForStable(await vaiSigner.getAddress(), tokenAmount);
+  const tokenBalanceAfter = await stableToken.balanceOf(vaiSignerAddress);
+  const tokenBalance = tokenBalanceAfter.sub(tokenBalanceBefore);
+  expect(tokenBalance).to.equal(tokenAmount);
+  await expect(tx).to.emit(psm, "VAIForStableSwapped").withArgs(tokenAmountUsd, tokenAmount, fee);
+}

simulations/vip-131/vip-131-testnet/abi/IAccessControlManager_ABI.json

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+[
+  { "inputs": [], "stateMutability": "nonpayable", "type": "constructor" },
+  {
+    "anonymous": false,
+    "inputs": [
+      { "indexed": true, "internalType": "bytes32", "name": "role", "type": "bytes32" },
+      { "indexed": true, "internalType": "bytes32", "name": "previousAdminRole", "type": "bytes32" },
+      { "indexed": true, "internalType": "bytes32", "name": "newAdminRole", "type": "bytes32" }
+    ],
+    "name": "RoleAdminChanged",
+    "type": "event"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      { "indexed": true, "internalType": "bytes32", "name": "role", "type": "bytes32" },
+      { "indexed": true, "internalType": "address", "name": "account", "type": "address" },
+      { "indexed": true, "internalType": "address", "name": "sender", "type": "address" }
+    ],
+    "name": "RoleGranted",
+    "type": "event"
+  },
+  {
+    "anonymous": false,
+    "inputs": [
+      { "indexed": true, "internalType": "bytes32", "name": "role", "type": "bytes32" },
+      { "indexed": true, "internalType": "address", "name": "account", "type": "address" },
+      { "indexed": true, "internalType": "address", "name": "sender", "type": "address" }
+    ],
+    "name": "RoleRevoked",
+    "type": "event"
+  },
+  {
+    "inputs": [],
+    "name": "DEFAULT_ADMIN_ROLE",
+    "outputs": [{ "internalType": "bytes32", "name": "", "type": "bytes32" }],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [{ "internalType": "bytes32", "name": "role", "type": "bytes32" }],
+    "name": "getRoleAdmin",
+    "outputs": [{ "internalType": "bytes32", "name": "", "type": "bytes32" }],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      { "internalType": "address", "name": "contractAddress", "type": "address" },
+      { "internalType": "string", "name": "functionSig", "type": "string" },
+      { "internalType": "address", "name": "accountToPermit", "type": "address" }
+    ],
+    "name": "giveCallPermission",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      { "internalType": "bytes32", "name": "role", "type": "bytes32" },
+      { "internalType": "address", "name": "account", "type": "address" }
+    ],
+    "name": "grantRole",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      { "internalType": "bytes32", "name": "role", "type": "bytes32" },
+      { "internalType": "address", "name": "account", "type": "address" }
+    ],
+    "name": "hasRole",
+    "outputs": [{ "internalType": "bool", "name": "", "type": "bool" }],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      { "internalType": "address", "name": "account", "type": "address" },
+      { "internalType": "string", "name": "functionSig", "type": "string" }
+    ],
+    "name": "isAllowedToCall",
+    "outputs": [{ "internalType": "bool", "name": "", "type": "bool" }],
+    "stateMutability": "view",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      { "internalType": "bytes32", "name": "role", "type": "bytes32" },
+      { "internalType": "address", "name": "account", "type": "address" }
+    ],
+    "name": "renounceRole",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      { "internalType": "address", "name": "contractAddress", "type": "address" },
+      { "internalType": "string", "name": "functionSig", "type": "string" },
+      { "internalType": "address", "name": "accountToRevoke", "type": "address" }
+    ],
+    "name": "revokeCallPermission",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [
+      { "internalType": "bytes32", "name": "role", "type": "bytes32" },
+      { "internalType": "address", "name": "account", "type": "address" }
+    ],
+    "name": "revokeRole",
+    "outputs": [],
+    "stateMutability": "nonpayable",
+    "type": "function"
+  },
+  {
+    "inputs": [{ "internalType": "bytes4", "name": "interfaceId", "type": "bytes4" }],
+    "name": "supportsInterface",
+    "outputs": [{ "internalType": "bool", "name": "", "type": "bool" }],
+    "stateMutability": "view",
+    "type": "function"
+  }
+]