diff --git a/package-lock.json b/package-lock.json
index bc00856..9991825 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -661,6 +661,23 @@
       "resolved": "https://registry.npmjs.org/@solidity-parser/parser/-/parser-0.6.2.tgz",
       "integrity": "sha512-kUVUvrqttndeprLoXjI5arWHeiP3uh4XODAKbG+ZaWHCVQeelxCbnXBeWxZ2BPHdXgH0xR9dU1b916JhDhbgAA=="
     },
+    "@studydefi/money-legos": {
+      "version": "2.3.5",
+      "resolved": "https://registry.npmjs.org/@studydefi/money-legos/-/money-legos-2.3.5.tgz",
+      "integrity": "sha512-Whfsw+Ka5PCX8u7za0DOnb3j7DqPQ0QW2SjtjrC4drP+MRpq6ANdxTLgAqYU2e5BZ3/DrDZ6MGTajMCPKXoxZw==",
+      "dev": true,
+      "requires": {
+        "@openzeppelin/contracts": "^2.5.0"
+      },
+      "dependencies": {
+        "@openzeppelin/contracts": {
+          "version": "2.5.1",
+          "resolved": "https://registry.npmjs.org/@openzeppelin/contracts/-/contracts-2.5.1.tgz",
+          "integrity": "sha512-qIy6tLx8rtybEsIOAlrM4J/85s2q2nPkDqj/Rx46VakBZ0LwtFhXIVub96LXHczQX0vaqmAueDqNPXtbSXSaYQ==",
+          "dev": true
+        }
+      }
+    },
     "@szmarczak/http-timer": {
       "version": "1.1.2",
       "resolved": "https://registry.npmjs.org/@szmarczak/http-timer/-/http-timer-1.1.2.tgz",
diff --git a/package.json b/package.json
index 946081a..4f1376c 100644
--- a/package.json
+++ b/package.json
@@ -37,6 +37,7 @@
   },
   "devDependencies": {
     "@openzeppelin/test-helpers": "^0.5.6",
+    "@studydefi/money-legos": "^2.3.5",
     "ganache-cli": "^6.10.0-beta.2",
     "sol-merger": "^2.0.1",
     "solidity-coverage": "0.5.11",
diff --git a/test/CurveProtocol.js b/test/CurveProtocol.js
index 53c8bf0..29325fd 100644
--- a/test/CurveProtocol.js
+++ b/test/CurveProtocol.js
@@ -25,10 +25,14 @@ const swapToken = '0xC25a3A3b969415c80451098fa907EC722572917F'
 const tokenContract = new web3.eth.Contract(erc20, swapToken)
 
 contract('Curve Protocol', async accounts => {
+  let account, contract;
+
+  beforeEach(async function() {
+    account = accounts[0]
+    contract = await CurveProtocol.deployed()
+  });
 
   it('should send ether to the user address', async () => {
-    let account = accounts[0]
-    let contract = await CurveProtocol.deployed()
     const ethBalanceBefore = await balance.current(userAddress);
     // Send 0.1 eth to userAddress to have gas to send an ERC20 tx.
     await web3.eth.sendTransaction({
@@ -41,8 +45,6 @@ contract('Curve Protocol', async accounts => {
   });
 
   it('should transfer DAI to CurveProtocol', async () => {
-    let account = accounts[0]
-    let contract = await CurveProtocol.deployed()
     // Get 100 DAI for first 5 accounts
     // daiAddress is passed to ganache-cli with flag `--unlock`
     // so we can use the `transfer` method
@@ -58,14 +60,11 @@ contract('Curve Protocol', async accounts => {
   });
 
   it('should approve DAI to CurveProtocol', async() => {
-    let account = accounts[0]
-    let contract = await CurveProtocol.deployed()
-
     await daiContract.methods
-          .approve(contract.address, ether('100').toString())
-          .send({ from: account, gasLimit: 800000 });
-      const daiAllowance = await daiContract.methods.allowance(account, contract.address).call()
-      expect(+daiAllowance).to.be.at.least(+ether('100'))
+      .approve(contract.address, ether('100').toString())
+      .send({ from: account, gasLimit: 800000 });
+    const daiAllowance = await daiContract.methods.allowance(account, contract.address).call()
+    expect(+daiAllowance).to.be.at.least(+ether('100'))
   });
 
   /* Deprecated as CurveProtocol is not ICurve and exchange has been implemented into sell method
@@ -84,7 +83,7 @@ contract('Curve Protocol', async accounts => {
   });
   */
 
-  /* Deprecated as CurveProtocol is not ICurve and calc_token_amount has been implemented into withdraw method
+    /* Deprecated as CurveProtocol is not ICurve and calc_token_amount has been implemented into withdraw method
   it('should add liquidity', async () => {
     let account = accounts[0]
     let contract = await CurveProtocol.deployed()
@@ -106,9 +105,9 @@ contract('Curve Protocol', async accounts => {
     let burnAmount = receipt.logs[0].args.burnAmount.toString()
     let tokenBalanceAfter = await tokenContract.methods.balanceOf(contract.address).call()
 
-    //weird Ganache errors sometimes "cannot decode event"
+//weird Ganache errors sometimes "cannot decode event"
     console.log(+tokenBalance, +tokenBalanceAfter, +burnAmount)
-    //expect(BN(tokenBalance)).to.be.a.bignumber.equal(BN(tokenBalanceAfter).add(burnAmount))
+//expect(BN(tokenBalance)).to.be.a.bignumber.equal(BN(tokenBalanceAfter).add(burnAmount))
 
   })
 
@@ -121,9 +120,9 @@ contract('Curve Protocol', async accounts => {
     let withdrawnAmount = receipt.logs[0].args.withdrawnAmount.toString()
     let daiBalanceAfter = await daiContract.methods.balanceOf(contract.address).call()
 
-    //weird Ganache errors sometimes "cannot decode event"
+//weird Ganache errors sometimes "cannot decode event"
     console.log(+daiBalance, +daiBalanceAfter, +withdrawnAmount)
-    //expect(BN(daiBalance)).to.be.a.bignumber.equal(BN(daiBalanceAfter).sub(withdrawnAmount));
+//expect(BN(daiBalance)).to.be.a.bignumber.equal(BN(daiBalanceAfter).sub(withdrawnAmount));
   })
   */
 });
diff --git a/test/CurveSBTCProtocol.js b/test/CurveSBTCProtocol.js
new file mode 100644
index 0000000..63a8771
--- /dev/null
+++ b/test/CurveSBTCProtocol.js
@@ -0,0 +1,77 @@
+const {
+  BN,           // Big Number support
+  expectEvent,  // Assertions for emitted events
+  expectRevert, // Assertions for transactions that should fail
+  balance,
+  ether
+} = require('@openzeppelin/test-helpers');
+
+const CurveSBTCProtocol = artifacts.require('CurveSBTCProtocol');
+const erc20 = require("@studydefi/money-legos/erc20");
+const uniswap = require("@studydefi/money-legos/uniswap");
+const sbtcABI = require("./abi/sbtc.json");
+
+contract('CurveSBTCProtocol', async accounts => {
+  const [sender, receiver] =  accounts;
+  let contract;
+
+  beforeEach(async function () {
+    contract = await CurveSBTCProtocol.deployed()
+
+    let wbtcContract = new web3.eth.Contract(erc20.wbtc.abi, erc20.wbtc.address);
+
+    let uniswapFactory = new web3.eth.Contract(
+      uniswap.factory.abi,
+      uniswap.factory.address
+    );
+
+    const wbtcExchangeAddress = await uniswapFactory.methods.getExchange(
+      erc20.wbtc.address,
+    ).call();
+
+    const wbtcExchange = new web3.eth.Contract(
+      uniswap.exchange.abi,
+      wbtcExchangeAddress
+    );
+
+    const wbtcBefore = await wbtcContract.methods.balanceOf(sender).call();
+
+    await wbtcExchange.methods.ethToTokenSwapInput(
+      1, // min amount of token retrieved
+      2525644800, // random timestamp in the future (year 2050)
+    ).send(
+      {
+        gas: 4000000,
+        value: ether("5"),
+        from: sender
+      }
+    );
+
+    let wbtcAfter = await wbtcContract.methods.balanceOf(sender).call();
+
+    expect(wbtcAfter - wbtcBefore).to.be.at.least(10000000);
+  });
+
+  it('can sell WBTC for SBTC', async function () {
+    const sbtcContract = new web3.eth.Contract(sbtcABI, "0xfe18be6b3bd88a2d2a7f928d00292e7a9963cfc6");
+
+    const sbtcBefore = await sbtcContract.methods.balanceOf(sender).call();
+
+    const tx = await contract.sell(
+      "0xfe18be6b3bd88a2d2a7f928d00292e7a9963cfc6",
+      erc20.wbtc.address,
+      10000000,
+      ( 0.09 / 0.1 * 1e18 ).toString(),
+      0,
+      0,
+      {
+        gas: 4000000,
+        from: sender
+      }
+    );
+    console.log(tx);
+
+    const sbtcAfter = await sbtcContract.methods.balanceOf(sender).call();
+    expect(sbtcAfter - sbtcBefore).to.be.at.least(ether("0.09"));
+  });
+});
diff --git a/test/abi/sbtc.json b/test/abi/sbtc.json
new file mode 100644
index 0000000..c227105
--- /dev/null
+++ b/test/abi/sbtc.json
@@ -0,0 +1 @@
+[{"constant":true,"inputs":[],"name":"name","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"spender","type":"address"},{"name":"value","type":"uint256"}],"name":"approve","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"_owner","type":"address"}],"name":"nominateNewOwner","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"totalSupply","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"from","type":"address"},{"name":"to","type":"address"},{"name":"value","type":"uint256"}],"name":"transferFrom","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"decimals","outputs":[{"name":"","type":"uint8"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"nominatedOwner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"owner","type":"address"}],"name":"balanceOf","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"_target","type":"address"}],"name":"setTarget","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[],"name":"acceptOwnership","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"owner","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"callData","type":"bytes"},{"name":"numTopics","type":"uint256"},{"name":"topic1","type":"bytes32"},{"name":"topic2","type":"bytes32"},{"name":"topic3","type":"bytes32"},{"name":"topic4","type":"bytes32"}],"name":"_emit","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"useDELEGATECALL","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[],"name":"symbol","outputs":[{"name":"","type":"string"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":false,"inputs":[{"name":"to","type":"address"},{"name":"value","type":"uint256"}],"name":"transfer","outputs":[{"name":"","type":"bool"}],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":false,"inputs":[{"name":"value","type":"bool"}],"name":"setUseDELEGATECALL","outputs":[],"payable":false,"stateMutability":"nonpayable","type":"function"},{"constant":true,"inputs":[],"name":"target","outputs":[{"name":"","type":"address"}],"payable":false,"stateMutability":"view","type":"function"},{"constant":true,"inputs":[{"name":"owner","type":"address"},{"name":"spender","type":"address"}],"name":"allowance","outputs":[{"name":"","type":"uint256"}],"payable":false,"stateMutability":"view","type":"function"},{"inputs":[{"name":"_owner","type":"address"}],"payable":false,"stateMutability":"nonpayable","type":"constructor"},{"payable":true,"stateMutability":"payable","type":"fallback"},{"anonymous":false,"inputs":[{"indexed":true,"name":"from","type":"address"},{"indexed":true,"name":"to","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Transfer","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"name":"owner","type":"address"},{"indexed":true,"name":"spender","type":"address"},{"indexed":false,"name":"value","type":"uint256"}],"name":"Approval","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"newTarget","type":"address"}],"name":"TargetUpdated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"newOwner","type":"address"}],"name":"OwnerNominated","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"name":"oldOwner","type":"address"},{"indexed":false,"name":"newOwner","type":"address"}],"name":"OwnerChanged","type":"event"}]