diff --git a/ui/app/ducks/tests/confirm-transaction.duck.test.js b/ui/app/ducks/tests/confirm-transaction.duck.test.js
new file mode 100644
index 000000000..111674e33
--- /dev/null
+++ b/ui/app/ducks/tests/confirm-transaction.duck.test.js
@@ -0,0 +1,675 @@
+import assert from 'assert'
+import configureMockStore from 'redux-mock-store'
+import thunk from 'redux-thunk'
+
+import ConfirmTransactionReducer, * as actions from '../confirm-transaction.duck.js'
+
+const initialState = {
+  txData: {},
+  tokenData: {},
+  methodData: {},
+  tokenProps: {
+    tokenDecimals: '',
+    tokenSymbol: '',
+  },
+  fiatTransactionAmount: '',
+  fiatTransactionFee: '',
+  fiatTransactionTotal: '',
+  ethTransactionAmount: '',
+  ethTransactionFee: '',
+  ethTransactionTotal: '',
+  hexGasTotal: '',
+  nonce: '',
+  fetchingMethodData: false,
+}
+
+const UPDATE_TX_DATA = 'metamask/confirm-transaction/UPDATE_TX_DATA'
+const CLEAR_TX_DATA = 'metamask/confirm-transaction/CLEAR_TX_DATA'
+const UPDATE_TOKEN_DATA = 'metamask/confirm-transaction/UPDATE_TOKEN_DATA'
+const CLEAR_TOKEN_DATA = 'metamask/confirm-transaction/CLEAR_TOKEN_DATA'
+const UPDATE_METHOD_DATA = 'metamask/confirm-transaction/UPDATE_METHOD_DATA'
+const CLEAR_METHOD_DATA = 'metamask/confirm-transaction/CLEAR_METHOD_DATA'
+const UPDATE_TRANSACTION_AMOUNTS = 'metamask/confirm-transaction/UPDATE_TRANSACTION_AMOUNTS'
+const UPDATE_TRANSACTION_FEES = 'metamask/confirm-transaction/UPDATE_TRANSACTION_FEES'
+const UPDATE_TRANSACTION_TOTALS = 'metamask/confirm-transaction/UPDATE_TRANSACTION_TOTALS'
+const UPDATE_HEX_GAS_TOTAL = 'metamask/confirm-transaction/UPDATE_HEX_GAS_TOTAL'
+const UPDATE_TOKEN_PROPS = 'metamask/confirm-transaction/UPDATE_TOKEN_PROPS'
+const UPDATE_NONCE = 'metamask/confirm-transaction/UPDATE_NONCE'
+const FETCH_METHOD_DATA_START = 'metamask/confirm-transaction/FETCH_METHOD_DATA_START'
+const FETCH_METHOD_DATA_END = 'metamask/confirm-transaction/FETCH_METHOD_DATA_END'
+const CLEAR_CONFIRM_TRANSACTION = 'metamask/confirm-transaction/CLEAR_CONFIRM_TRANSACTION'
+
+describe('Confirm Transaction Duck', () => {
+  describe('State changes', () => {
+    const mockState = {
+      confirmTransaction: {
+        txData: {
+          id: 1,
+        },
+        tokenData: {
+          name: 'abcToken',
+        },
+        methodData: {
+          name: 'approve',
+        },
+        tokenProps: {
+          tokenDecimals: '3',
+          tokenSymbol: 'ABC',
+        },
+        fiatTransactionAmount: '469.26',
+        fiatTransactionFee: '0.01',
+        fiatTransactionTotal: '1.000021',
+        ethTransactionAmount: '1',
+        ethTransactionFee: '0.000021',
+        ethTransactionTotal: '469.27',
+        hexGasTotal: '0x1319718a5000',
+        nonce: '0x0',
+        fetchingMethodData: false,
+      },
+    }
+
+    it('should initialize state', () => {
+      assert.deepEqual(
+        ConfirmTransactionReducer({}),
+        initialState
+      )
+    })
+
+    it('should return state unchanged if it does not match a dispatched actions type', () => {
+      assert.deepEqual(
+        ConfirmTransactionReducer(mockState, {
+          type: 'someOtherAction',
+          value: 'someValue',
+        }),
+        { ...mockState.confirmTransaction },
+      )
+    })
+
+    it('should set txData when receiving a UPDATE_TX_DATA action', () => {
+      assert.deepEqual(
+        ConfirmTransactionReducer(mockState, {
+          type: UPDATE_TX_DATA,
+          payload: {
+            id: 2,
+          },
+        }),
+        {
+          ...mockState.confirmTransaction,
+          txData: {
+            ...mockState.confirmTransaction.txData,
+            id: 2,
+          },
+        }
+      )
+    })
+
+    it('should clear txData when receiving a CLEAR_TX_DATA action', () => {
+      assert.deepEqual(
+        ConfirmTransactionReducer(mockState, {
+          type: CLEAR_TX_DATA,
+        }),
+        {
+          ...mockState.confirmTransaction,
+          txData: {},
+        }
+      )
+    })
+
+    it('should set tokenData when receiving a UPDATE_TOKEN_DATA action', () => {
+      assert.deepEqual(
+        ConfirmTransactionReducer(mockState, {
+          type: UPDATE_TOKEN_DATA,
+          payload: {
+            name: 'defToken',
+          },
+        }),
+        {
+          ...mockState.confirmTransaction,
+          tokenData: {
+            ...mockState.confirmTransaction.tokenData,
+            name: 'defToken',
+          },
+        }
+      )
+    })
+
+    it('should clear tokenData when receiving a CLEAR_TOKEN_DATA action', () => {
+      assert.deepEqual(
+        ConfirmTransactionReducer(mockState, {
+          type: CLEAR_TOKEN_DATA,
+        }),
+        {
+          ...mockState.confirmTransaction,
+          tokenData: {},
+        }
+      )
+    })
+
+    it('should set methodData when receiving a UPDATE_METHOD_DATA action', () => {
+      assert.deepEqual(
+        ConfirmTransactionReducer(mockState, {
+          type: UPDATE_METHOD_DATA,
+          payload: {
+            name: 'transferFrom',
+          },
+        }),
+        {
+          ...mockState.confirmTransaction,
+          methodData: {
+            ...mockState.confirmTransaction.methodData,
+            name: 'transferFrom',
+          },
+        }
+      )
+    })
+
+    it('should clear methodData when receiving a CLEAR_METHOD_DATA action', () => {
+      assert.deepEqual(
+        ConfirmTransactionReducer(mockState, {
+          type: CLEAR_METHOD_DATA,
+        }),
+        {
+          ...mockState.confirmTransaction,
+          methodData: {},
+        }
+      )
+    })
+
+    it('should update transaction amounts when receiving an UPDATE_TRANSACTION_AMOUNTS action', () => {
+      assert.deepEqual(
+        ConfirmTransactionReducer(mockState, {
+          type: UPDATE_TRANSACTION_AMOUNTS,
+          payload: {
+            fiatTransactionAmount: '123.45',
+            ethTransactionAmount: '.5',
+          },
+        }),
+        {
+          ...mockState.confirmTransaction,
+          fiatTransactionAmount: '123.45',
+          ethTransactionAmount: '.5',
+        }
+      )
+    })
+
+    it('should update transaction fees when receiving an UPDATE_TRANSACTION_FEES action', () => {
+      assert.deepEqual(
+        ConfirmTransactionReducer(mockState, {
+          type: UPDATE_TRANSACTION_FEES,
+          payload: {
+            fiatTransactionFee: '123.45',
+            ethTransactionFee: '.5',
+          },
+        }),
+        {
+          ...mockState.confirmTransaction,
+          fiatTransactionFee: '123.45',
+          ethTransactionFee: '.5',
+        }
+      )
+    })
+
+    it('should update transaction totals when receiving an UPDATE_TRANSACTION_TOTALS action', () => {
+      assert.deepEqual(
+        ConfirmTransactionReducer(mockState, {
+          type: UPDATE_TRANSACTION_TOTALS,
+          payload: {
+            fiatTransactionTotal: '123.45',
+            ethTransactionTotal: '.5',
+          },
+        }),
+        {
+          ...mockState.confirmTransaction,
+          fiatTransactionTotal: '123.45',
+          ethTransactionTotal: '.5',
+        }
+      )
+    })
+
+    it('should update hexGasTotal when receiving an UPDATE_HEX_GAS_TOTAL action', () => {
+      assert.deepEqual(
+        ConfirmTransactionReducer(mockState, {
+          type: UPDATE_HEX_GAS_TOTAL,
+          payload: '0x0',
+        }),
+        {
+          ...mockState.confirmTransaction,
+          hexGasTotal: '0x0',
+        }
+      )
+    })
+
+    it('should update tokenProps when receiving an UPDATE_TOKEN_PROPS action', () => {
+      assert.deepEqual(
+        ConfirmTransactionReducer(mockState, {
+          type: UPDATE_TOKEN_PROPS,
+          payload: {
+            tokenSymbol: 'DEF',
+            tokenDecimals: '1',
+          },
+        }),
+        {
+          ...mockState.confirmTransaction,
+          tokenProps: {
+            tokenSymbol: 'DEF',
+            tokenDecimals: '1',
+          },
+        }
+      )
+    })
+
+    it('should update nonce when receiving an UPDATE_NONCE action', () => {
+      assert.deepEqual(
+        ConfirmTransactionReducer(mockState, {
+          type: UPDATE_NONCE,
+          payload: '0x1',
+        }),
+        {
+          ...mockState.confirmTransaction,
+          nonce: '0x1',
+        }
+      )
+    })
+
+    it('should set fetchingMethodData to true when receiving a FETCH_METHOD_DATA_START action', () => {
+      assert.deepEqual(
+        ConfirmTransactionReducer(mockState, {
+          type: FETCH_METHOD_DATA_START,
+        }),
+        {
+          ...mockState.confirmTransaction,
+          fetchingMethodData: true,
+        }
+      )
+    })
+
+    it('should set fetchingMethodData to false when receiving a FETCH_METHOD_DATA_END action', () => {
+      assert.deepEqual(
+        ConfirmTransactionReducer({ confirmTransaction: { fetchingMethodData: true } }, {
+          type: FETCH_METHOD_DATA_END,
+        }),
+        {
+          fetchingMethodData: false,
+        }
+      )
+    })
+
+    it('should clear confirmTransaction when receiving a FETCH_METHOD_DATA_END action', () => {
+      assert.deepEqual(
+        ConfirmTransactionReducer(mockState, {
+          type: CLEAR_CONFIRM_TRANSACTION,
+        }),
+        {
+          ...initialState,
+        }
+      )
+    })
+  })
+
+  describe('Single actions', () => {
+    it('should create an action to update txData', () => {
+      const txData = { test: 123 }
+      const expectedAction = {
+        type: UPDATE_TX_DATA,
+        payload: txData,
+      }
+
+      assert.deepEqual(
+        actions.updateTxData(txData),
+        expectedAction
+      )
+    })
+
+    it('should create an action to clear txData', () => {
+      const expectedAction = {
+        type: CLEAR_TX_DATA,
+      }
+
+      assert.deepEqual(
+        actions.clearTxData(),
+        expectedAction
+      )
+    })
+
+    it('should create an action to update tokenData', () => {
+      const tokenData = { test: 123 }
+      const expectedAction = {
+        type: UPDATE_TOKEN_DATA,
+        payload: tokenData,
+      }
+
+      assert.deepEqual(
+        actions.updateTokenData(tokenData),
+        expectedAction
+      )
+    })
+
+    it('should create an action to clear tokenData', () => {
+      const expectedAction = {
+        type: CLEAR_TOKEN_DATA,
+      }
+
+      assert.deepEqual(
+        actions.clearTokenData(),
+        expectedAction
+      )
+    })
+
+    it('should create an action to update methodData', () => {
+      const methodData = { test: 123 }
+      const expectedAction = {
+        type: UPDATE_METHOD_DATA,
+        payload: methodData,
+      }
+
+      assert.deepEqual(
+        actions.updateMethodData(methodData),
+        expectedAction
+      )
+    })
+
+    it('should create an action to clear methodData', () => {
+      const expectedAction = {
+        type: CLEAR_METHOD_DATA,
+      }
+
+      assert.deepEqual(
+        actions.clearMethodData(),
+        expectedAction
+      )
+    })
+
+    it('should create an action to update transaction amounts', () => {
+      const transactionAmounts = { test: 123 }
+      const expectedAction = {
+        type: UPDATE_TRANSACTION_AMOUNTS,
+        payload: transactionAmounts,
+      }
+
+      assert.deepEqual(
+        actions.updateTransactionAmounts(transactionAmounts),
+        expectedAction
+      )
+    })
+
+    it('should create an action to update transaction fees', () => {
+      const transactionFees = { test: 123 }
+      const expectedAction = {
+        type: UPDATE_TRANSACTION_FEES,
+        payload: transactionFees,
+      }
+
+      assert.deepEqual(
+        actions.updateTransactionFees(transactionFees),
+        expectedAction
+      )
+    })
+
+    it('should create an action to update transaction totals', () => {
+      const transactionTotals = { test: 123 }
+      const expectedAction = {
+        type: UPDATE_TRANSACTION_TOTALS,
+        payload: transactionTotals,
+      }
+
+      assert.deepEqual(
+        actions.updateTransactionTotals(transactionTotals),
+        expectedAction
+      )
+    })
+
+    it('should create an action to update hexGasTotal', () => {
+      const hexGasTotal = '0x0'
+      const expectedAction = {
+        type: UPDATE_HEX_GAS_TOTAL,
+        payload: hexGasTotal,
+      }
+
+      assert.deepEqual(
+        actions.updateHexGasTotal(hexGasTotal),
+        expectedAction
+      )
+    })
+
+    it('should create an action to update tokenProps', () => {
+      const tokenProps = {
+        tokenDecimals: '1',
+        tokenSymbol: 'abc',
+      }
+      const expectedAction = {
+        type: UPDATE_TOKEN_PROPS,
+        payload: tokenProps,
+      }
+
+      assert.deepEqual(
+        actions.updateTokenProps(tokenProps),
+        expectedAction
+      )
+    })
+
+    it('should create an action to update nonce', () => {
+      const nonce = '0x1'
+      const expectedAction = {
+        type: UPDATE_NONCE,
+        payload: nonce,
+      }
+
+      assert.deepEqual(
+        actions.updateNonce(nonce),
+        expectedAction
+      )
+    })
+
+    it('should create an action to set fetchingMethodData to true', () => {
+      const expectedAction = {
+        type: FETCH_METHOD_DATA_START,
+      }
+
+      assert.deepEqual(
+        actions.setFetchingMethodData(true),
+        expectedAction
+      )
+    })
+
+    it('should create an action to set fetchingMethodData to false', () => {
+      const expectedAction = {
+        type: FETCH_METHOD_DATA_END,
+      }
+
+      assert.deepEqual(
+        actions.setFetchingMethodData(false),
+        expectedAction
+      )
+    })
+
+    it('should create an action to clear confirmTransaction', () => {
+      const expectedAction = {
+        type: CLEAR_CONFIRM_TRANSACTION,
+      }
+
+      assert.deepEqual(
+        actions.clearConfirmTransaction(),
+        expectedAction
+      )
+    })
+  })
+
+  describe('Thunk actions', done => {
+    it('updates txData and gas on an existing transaction in confirmTransaction', () => {
+      const mockState = {
+        metamask: {
+          conversionRate: 468.58,
+          currentCurrency: 'usd',
+        },
+        confirmTransaction: {
+          ethTransactionAmount: '1',
+          ethTransactionFee: '0.000021',
+          ethTransactionTotal: '1.000021',
+          fetchingMethodData: false,
+          fiatTransactionAmount: '469.26',
+          fiatTransactionFee: '0.01',
+          fiatTransactionTotal: '469.27',
+          hexGasTotal: '0x1319718a5000',
+          methodData: {},
+          nonce: '',
+          tokenData: {},
+          tokenProps: {
+            tokenDecimals: '',
+            tokenSymbol: '',
+          },
+          txData: {
+            estimatedGas: '0x5208',
+            gasLimitSpecified: false,
+            gasPriceSpecified: false,
+            history: [],
+            id: 2603411941761054,
+            loadingDefaults: false,
+            metamaskNetworkId: '3',
+            origin: 'faucet.metamask.io',
+            simpleSend: true,
+            status: 'unapproved',
+            time: 1530838113716,
+          },
+        },
+      }
+
+      const middlewares = [thunk]
+      const mockStore = configureMockStore(middlewares)
+      const store = mockStore(mockState)
+      const expectedActions = [
+        'metamask/confirm-transaction/UPDATE_TX_DATA',
+        'metamask/confirm-transaction/UPDATE_TRANSACTION_AMOUNTS',
+        'metamask/confirm-transaction/UPDATE_HEX_GAS_TOTAL',
+        'metamask/confirm-transaction/UPDATE_TRANSACTION_FEES',
+        'metamask/confirm-transaction/UPDATE_TRANSACTION_TOTALS',
+      ]
+
+      store.dispatch(actions.updateGasAndCalculate({ gasLimit: '0x2', gasPrice: '0x25' }))
+
+      const storeActions = store.getActions()
+      assert.equal(storeActions.length, expectedActions.length)
+      storeActions.forEach((action, index) => assert.equal(action.type, expectedActions[index]))
+    })
+
+    it('updates txData and updates gas values in confirmTransaction', () => {
+      const txData = {
+        estimatedGas: '0x5208',
+        gasLimitSpecified: false,
+        gasPriceSpecified: false,
+        history: [],
+        id: 2603411941761054,
+        loadingDefaults: false,
+        metamaskNetworkId: '3',
+        origin: 'faucet.metamask.io',
+        simpleSend: true,
+        status: 'unapproved',
+        time: 1530838113716,
+        txParams: {
+          from: '0xc5ae6383e126f901dcb06131d97a88745bfa88d6',
+          gas: '0x33450',
+          gasPrice: '0x2540be400',
+          to: '0x81b7e08f65bdf5648606c89998a9cc8164397647',
+          value: '0xde0b6b3a7640000',
+        },
+      }
+      const mockState = {
+        metamask: {
+          conversionRate: 468.58,
+          currentCurrency: 'usd',
+        },
+        confirmTransaction: {
+          ethTransactionAmount: '1',
+          ethTransactionFee: '0.000021',
+          ethTransactionTotal: '1.000021',
+          fetchingMethodData: false,
+          fiatTransactionAmount: '469.26',
+          fiatTransactionFee: '0.01',
+          fiatTransactionTotal: '469.27',
+          hexGasTotal: '0x1319718a5000',
+          methodData: {},
+          nonce: '',
+          tokenData: {},
+          tokenProps: {
+            tokenDecimals: '',
+            tokenSymbol: '',
+          },
+          txData: {
+            ...txData,
+            txParams: {
+              ...txData.txParams,
+            },
+          },
+        },
+      }
+
+      const middlewares = [thunk]
+      const mockStore = configureMockStore(middlewares)
+      const store = mockStore(mockState)
+      const expectedActions = [
+        'metamask/confirm-transaction/UPDATE_TX_DATA',
+        'metamask/confirm-transaction/UPDATE_TRANSACTION_AMOUNTS',
+        'metamask/confirm-transaction/UPDATE_HEX_GAS_TOTAL',
+        'metamask/confirm-transaction/UPDATE_TRANSACTION_FEES',
+        'metamask/confirm-transaction/UPDATE_TRANSACTION_TOTALS',
+      ]
+
+      store.dispatch(actions.updateTxDataAndCalculate(txData))
+
+      const storeActions = store.getActions()
+      assert.equal(storeActions.length, expectedActions.length)
+      storeActions.forEach((action, index) => assert.equal(action.type, expectedActions[index]))
+    })
+
+    it('updates confirmTransaction transaction', done => {
+      const mockState = {
+        metamask: {
+          conversionRate: 468.58,
+          currentCurrency: 'usd',
+          network: '3',
+          unapprovedTxs: {
+            2603411941761054: {
+              estimatedGas: '0x5208',
+              gasLimitSpecified: false,
+              gasPriceSpecified: false,
+              history: [],
+              id: 2603411941761054,
+              loadingDefaults: false,
+              metamaskNetworkId: '3',
+              origin: 'faucet.metamask.io',
+              simpleSend: true,
+              status: 'unapproved',
+              time: 1530838113716,
+              txParams: {
+                from: '0xc5ae6383e126f901dcb06131d97a88745bfa88d6',
+                gas: '0x33450',
+                gasPrice: '0x2540be400',
+                to: '0x81b7e08f65bdf5648606c89998a9cc8164397647',
+                value: '0xde0b6b3a7640000',
+              },
+            },
+          },
+        },
+        confirmTransaction: {},
+      }
+
+      const middlewares = [thunk]
+      const mockStore = configureMockStore(middlewares)
+      const store = mockStore(mockState)
+      const expectedActions = [
+        'metamask/confirm-transaction/UPDATE_TX_DATA',
+        'metamask/confirm-transaction/UPDATE_TRANSACTION_AMOUNTS',
+        'metamask/confirm-transaction/UPDATE_HEX_GAS_TOTAL',
+        'metamask/confirm-transaction/UPDATE_TRANSACTION_FEES',
+        'metamask/confirm-transaction/UPDATE_TRANSACTION_TOTALS',
+      ]
+
+      store.dispatch(actions.setTransactionToConfirm(2603411941761054))
+        .then(() => {
+          const storeActions = store.getActions()
+          assert.equal(storeActions.length, expectedActions.length)
+          storeActions.forEach((action, index) => assert.equal(action.type, expectedActions[index]))
+          done()
+        })
+    })
+  })
+})
diff --git a/ui/app/helpers/confirm-transaction/util.test.js b/ui/app/helpers/confirm-transaction/util.test.js
new file mode 100644
index 000000000..a9c8fae34
--- /dev/null
+++ b/ui/app/helpers/confirm-transaction/util.test.js
@@ -0,0 +1,137 @@
+import * as utils from './util'
+import assert from 'assert'
+
+describe('Confirm Transaction utils', () => {
+  describe('increaseLastGasPrice', () => {
+    it('should increase the gasPrice by 10%', () => {
+      const increasedGasPrice = utils.increaseLastGasPrice('0xa')
+      assert.equal(increasedGasPrice, '0xb')
+    })
+
+    it('should prefix the result with 0x', () => {
+      const increasedGasPrice = utils.increaseLastGasPrice('a')
+      assert.equal(increasedGasPrice, '0xb')
+    })
+  })
+
+  describe('hexGreaterThan', () => {
+    it('should return true if the first value is greater than the second value', () => {
+      assert.equal(
+        utils.hexGreaterThan('0xb', '0xa'),
+        true
+      )
+    })
+
+    it('should return false if the first value is less than the second value', () => {
+      assert.equal(
+        utils.hexGreaterThan('0xa', '0xb'),
+        false
+      )
+    })
+
+    it('should return false if the first value is equal to the second value', () => {
+      assert.equal(
+        utils.hexGreaterThan('0xa', '0xa'),
+        false
+      )
+    })
+
+    it('should correctly compare prefixed and non-prefixed hex values', () => {
+      assert.equal(
+        utils.hexGreaterThan('0xb', 'a'),
+        true
+      )
+    })
+  })
+
+  describe('getHexGasTotal', () => {
+    it('should multiply the hex gasLimit and hex gasPrice values together', () => {
+      assert.equal(
+        utils.getHexGasTotal({ gasLimit: '0x5208', gasPrice: '0x3b9aca00' }),
+        '0x1319718a5000'
+      )
+    })
+
+    it('should prefix the result with 0x', () => {
+      assert.equal(
+        utils.getHexGasTotal({ gasLimit: '5208', gasPrice: '3b9aca00' }),
+        '0x1319718a5000'
+      )
+    })
+  })
+
+  describe('addEth', () => {
+    it('should add two values together rounding to 6 decimal places', () => {
+      assert.equal(
+        utils.addEth('0.12345678', '0'),
+        '0.123457'
+      )
+    })
+
+    it('should add any number of values together rounding to 6 decimal places', () => {
+      assert.equal(
+        utils.addEth('0.1', '0.02', '0.003', '0.0004', '0.00005', '0.000006', '0.0000007'),
+        '0.123457'
+      )
+    })
+  })
+
+  describe('addFiat', () => {
+    it('should add two values together rounding to 2 decimal places', () => {
+      assert.equal(
+        utils.addFiat('0.12345678', '0'),
+        '0.12'
+      )
+    })
+
+    it('should add any number of values together rounding to 2 decimal places', () => {
+      assert.equal(
+        utils.addFiat('0.1', '0.02', '0.003', '0.0004', '0.00005', '0.000006', '0.0000007'),
+        '0.12'
+      )
+    })
+  })
+
+  describe('getTransactionAmount', () => {
+    it('should get the transaction amount in ETH', () => {
+      const ethTransactionAmount = utils.getTransactionAmount({
+        value: '0xde0b6b3a7640000', toCurrency: 'ETH', conversionRate: 468.58, numberOfDecimals: 6,
+      })
+
+      assert.equal(ethTransactionAmount, '1')
+    })
+
+    it('should get the transaction amount in fiat', () => {
+      const fiatTransactionAmount = utils.getTransactionAmount({
+        value: '0xde0b6b3a7640000', toCurrency: 'usd', conversionRate: 468.58, numberOfDecimals: 2,
+      })
+
+      assert.equal(fiatTransactionAmount, '468.58')
+    })
+  })
+
+  describe('getTransactionFee', () => {
+    it('should get the transaction fee in ETH', () => {
+      const ethTransactionFee = utils.getTransactionFee({
+        value: '0x1319718a5000', toCurrency: 'ETH', conversionRate: 468.58, numberOfDecimals: 6,
+      })
+
+      assert.equal(ethTransactionFee, '0.000021')
+    })
+
+    it('should get the transaction fee in fiat', () => {
+      const fiatTransactionFee = utils.getTransactionFee({
+        value: '0x1319718a5000', toCurrency: 'usd', conversionRate: 468.58, numberOfDecimals: 2,
+      })
+
+      assert.equal(fiatTransactionFee, '0.01')
+    })
+  })
+
+  describe('formatCurrency', () => {
+    it('should format USD values', () => {
+      const value = utils.formatCurrency('123.45', 'usd')
+      assert.equal(value, '$123.45')
+    })
+  })
+})