Merge branch 'development' of https://github.com/0xProject/0x-monorepo into feature/instant/maker-asset-datas-interface

23 files changed, 515 insertions, 59 deletions

diff --git a/packages/asset-buyer/CHANGELOG.json b/packages/asset-buyer/CHANGELOG.json
index 6ba2a0fd9..0d71bb84d 100644
--- a/packages/asset-buyer/CHANGELOG.json
+++ b/packages/asset-buyer/CHANGELOG.json
@@ -14,6 +14,16 @@
             {
                 "note": "No longer require that provided orders all have the same maker and taker asset data",
                 "pr": 1197
+            },
+            {
+                "note":
+                    "Fix bug where `BuyQuoteInfo` objects could return `totalEthAmount` and `feeEthAmount` that were not whole numbers",
+                "pr": 1207
+            },
+            {
+                "note":
+                    "Fix bug where default values for `AssetBuyer` public facing methods could get overriden by `undefined` values",
+                "pr": 1207
             }
         ]
     },
diff --git a/packages/asset-buyer/src/asset_buyer.ts b/packages/asset-buyer/src/asset_buyer.ts
index 49743404f..934410c55 100644
--- a/packages/asset-buyer/src/asset_buyer.ts
+++ b/packages/asset-buyer/src/asset_buyer.ts
@@ -90,10 +90,11 @@ export class AssetBuyer {
      * @return  An instance of AssetBuyer
      */
     constructor(provider: Provider, orderProvider: OrderProvider, options: Partial<AssetBuyerOpts> = {}) {
-        const { networkId, orderRefreshIntervalMs, expiryBufferSeconds } = {
-            ...constants.DEFAULT_ASSET_BUYER_OPTS,
-            ...options,
-        };
+        const { networkId, orderRefreshIntervalMs, expiryBufferSeconds } = _.merge(
+            {},
+            constants.DEFAULT_ASSET_BUYER_OPTS,
+            options,
+        );
         assert.isWeb3Provider('provider', provider);
         assert.isValidOrderProvider('orderProvider', orderProvider);
         assert.isNumber('networkId', networkId);
@@ -122,10 +123,11 @@ export class AssetBuyer {
         assetBuyAmount: BigNumber,
         options: Partial<BuyQuoteRequestOpts> = {},
     ): Promise<BuyQuote> {
-        const { feePercentage, shouldForceOrderRefresh, slippagePercentage } = {
-            ...constants.DEFAULT_BUY_QUOTE_REQUEST_OPTS,
-            ...options,
-        };
+        const { feePercentage, shouldForceOrderRefresh, slippagePercentage } = _.merge(
+            {},
+            constants.DEFAULT_BUY_QUOTE_REQUEST_OPTS,
+            options,
+        );
         assert.isString('assetData', assetData);
         assert.isBigNumber('assetBuyAmount', assetBuyAmount);
         assert.isValidPercentage('feePercentage', feePercentage);
@@ -186,10 +188,11 @@ export class AssetBuyer {
         buyQuote: BuyQuote,
         options: Partial<BuyQuoteExecutionOpts> = {},
     ): Promise<string> {
-        const { ethAmount, takerAddress, feeRecipient, gasLimit, gasPrice } = {
-            ...constants.DEFAULT_BUY_QUOTE_EXECUTION_OPTS,
-            ...options,
-        };
+        const { ethAmount, takerAddress, feeRecipient, gasLimit, gasPrice } = _.merge(
+            {},
+            constants.DEFAULT_BUY_QUOTE_EXECUTION_OPTS,
+            options,
+        );
         assert.isValidBuyQuote('buyQuote', buyQuote);
         if (!_.isUndefined(ethAmount)) {
             assert.isBigNumber('ethAmount', ethAmount);
@@ -198,6 +201,12 @@ export class AssetBuyer {
             assert.isETHAddressHex('takerAddress', takerAddress);
         }
         assert.isETHAddressHex('feeRecipient', feeRecipient);
+        if (!_.isUndefined(gasLimit)) {
+            assert.isNumber('gasLimit', gasLimit);
+        }
+        if (!_.isUndefined(gasPrice)) {
+            assert.isBigNumber('gasPrice', gasPrice);
+        }
         const { orders, feeOrders, feePercentage, assetBuyAmount, worstCaseQuoteInfo } = buyQuote;
         // if no takerAddress is provided, try to get one from the provider
         let finalTakerAddress;
diff --git a/packages/asset-buyer/src/utils/buy_quote_calculator.ts b/packages/asset-buyer/src/utils/buy_quote_calculator.ts
index f94ab3fa4..6a67ed1ed 100644
--- a/packages/asset-buyer/src/utils/buy_quote_calculator.ts
+++ b/packages/asset-buyer/src/utils/buy_quote_calculator.ts
@@ -119,7 +119,7 @@ function calculateQuoteInfo(
         ethAmountToBuyZrx = findEthAmountNeededToBuyZrx(feeOrdersAndFillableAmounts, zrxAmountToBuyAsset);
     }
     /// find the eth amount needed to buy the affiliate fee
-    const ethAmountToBuyAffiliateFee = ethAmountToBuyAsset.mul(feePercentage);
+    const ethAmountToBuyAffiliateFee = ethAmountToBuyAsset.mul(feePercentage).ceil();
     const totalEthAmountWithoutAffiliateFee = ethAmountToBuyAsset.plus(ethAmountToBuyZrx);
     const ethAmountTotal = totalEthAmountWithoutAffiliateFee.plus(ethAmountToBuyAffiliateFee);
     // divide into the assetBuyAmount in order to find rate of makerAsset / WETH
diff --git a/packages/instant/public/index.html b/packages/instant/public/index.html
index 762369d9c..92c8a6c21 100644
--- a/packages/instant/public/index.html
+++ b/packages/instant/public/index.html
@@ -77,12 +77,22 @@
         }
         const orderSourceOverride = queryParams.getQueryParamValue('orderSource');
         const availableAssetDatasString = queryParams.getQueryParamValue('availableAssetDatas');
+        const feeRecipientOverride = queryParams.getQueryParamValue('feeRecipient');
+        const feePercentageOverride = +queryParams.getQueryParamValue('feePercentage');
+        let affiliateInfoOverride;
+        if (feeRecipientOverride !== undefined && feePercentageOverride !== undefined) {
+            affiliateInfoOverride = {
+                feeRecipient: feeRecipientOverride,
+                feePercentage: feePercentageOverride
+            };
+        }
         const renderOptionsOverrides = {
             orderSource: orderSourceOverride === 'provided' ? [providedOrder] : orderSourceOverride,
             networkId: +queryParams.getQueryParamValue('networkId') || undefined,
             defaultAssetBuyAmount: +queryParams.getQueryParamValue('defaultAssetBuyAmount') || undefined,
             availableAssetDatas: availableAssetDatasString ? JSON.parse(availableAssetDatasString) : undefined,
             defaultSelectedAssetData: queryParams.getQueryParamValue('defaultSelectedAssetData'),
+            affiliateInfo: affiliateInfoOverride,
         }
         const renderOptions = Object.assign({}, renderOptionsDefaults, removeUndefined(renderOptionsOverrides));
         zeroExInstant.render(renderOptions);
diff --git a/packages/instant/src/components/buy_button.tsx b/packages/instant/src/components/buy_button.tsx
index 93bd8e635..12ac62601 100644
--- a/packages/instant/src/components/buy_button.tsx
+++ b/packages/instant/src/components/buy_button.tsx
@@ -1,10 +1,11 @@
 import { AssetBuyer, AssetBuyerError, BuyQuote } from '@0x/asset-buyer';
 import * as _ from 'lodash';
 import * as React from 'react';
+import { oc } from 'ts-optchain';
 
 import { WEB_3_WRAPPER_TRANSACTION_FAILED_ERROR_MSG_PREFIX } from '../constants';
 import { ColorOption } from '../style/theme';
-import { ZeroExInstantError } from '../types';
+import { AffiliateInfo, ZeroExInstantError } from '../types';
 import { getBestAddress } from '../util/address';
 import { balanceUtil } from '../util/balance';
 import { gasPriceEstimator } from '../util/gas_price_estimator';
@@ -16,10 +17,11 @@ import { Button, Text } from './ui';
 export interface BuyButtonProps {
     buyQuote?: BuyQuote;
     assetBuyer?: AssetBuyer;
+    affiliateInfo?: AffiliateInfo;
     onValidationPending: (buyQuote: BuyQuote) => void;
     onValidationFail: (buyQuote: BuyQuote, errorMessage: AssetBuyerError | ZeroExInstantError) => void;
     onSignatureDenied: (buyQuote: BuyQuote) => void;
-    onBuyProcessing: (buyQuote: BuyQuote, txHash: string) => void;
+    onBuyProcessing: (buyQuote: BuyQuote, txHash: string, startTimeUnix: number, expectedEndTimeUnix: number) => void;
     onBuySuccess: (buyQuote: BuyQuote, txHash: string) => void;
     onBuyFailure: (buyQuote: BuyQuote, txHash: string) => void;
 }
@@ -42,7 +44,7 @@ export class BuyButton extends React.Component<BuyButtonProps> {
     }
     private readonly _handleClick = async () => {
         // The button is disabled when there is no buy quote anyway.
-        const { buyQuote, assetBuyer } = this.props;
+        const { buyQuote, assetBuyer, affiliateInfo } = this.props;
         if (_.isUndefined(buyQuote) || _.isUndefined(assetBuyer)) {
             return;
         }
@@ -57,9 +59,14 @@ export class BuyButton extends React.Component<BuyButtonProps> {
         }
 
         let txHash: string | undefined;
-        const gasPrice = await gasPriceEstimator.getFastAmountInWeiAsync();
+        const gasInfo = await gasPriceEstimator.getGasInfoAsync();
+        const feeRecipient = oc(affiliateInfo).feeRecipient();
         try {
-            txHash = await assetBuyer.executeBuyQuoteAsync(buyQuote, { takerAddress, gasPrice });
+            txHash = await assetBuyer.executeBuyQuoteAsync(buyQuote, {
+                feeRecipient,
+                takerAddress,
+                gasPrice: gasInfo.gasPriceInWei,
+            });
         } catch (e) {
             if (e instanceof Error) {
                 if (e.message === AssetBuyerError.SignatureRequestDenied) {
@@ -73,7 +80,9 @@ export class BuyButton extends React.Component<BuyButtonProps> {
             throw e;
         }
 
-        this.props.onBuyProcessing(buyQuote, txHash);
+        const startTimeUnix = new Date().getTime();
+        const expectedEndTimeUnix = startTimeUnix + gasInfo.estimatedTimeMs;
+        this.props.onBuyProcessing(buyQuote, txHash, startTimeUnix, expectedEndTimeUnix);
         try {
             await web3Wrapper.awaitTransactionSuccessAsync(txHash);
         } catch (e) {
@@ -83,6 +92,7 @@ export class BuyButton extends React.Component<BuyButtonProps> {
             }
             throw e;
         }
+
         this.props.onBuySuccess(buyQuote, txHash);
     };
 }
diff --git a/packages/instant/src/components/buy_order_progress.tsx b/packages/instant/src/components/buy_order_progress.tsx
new file mode 100644
index 000000000..e259e5606
--- /dev/null
+++ b/packages/instant/src/components/buy_order_progress.tsx
@@ -0,0 +1,35 @@
+import * as React from 'react';
+
+import { TimedProgressBar } from '../components/timed_progress_bar';
+
+import { TimeCounter } from '../components/time_counter';
+import { Container } from '../components/ui';
+import { OrderProcessState, OrderState } from '../types';
+
+export interface BuyOrderProgressProps {
+    buyOrderState: OrderState;
+}
+
+export const BuyOrderProgress: React.StatelessComponent<BuyOrderProgressProps> = props => {
+    const { buyOrderState } = props;
+
+    if (
+        buyOrderState.processState === OrderProcessState.PROCESSING ||
+        buyOrderState.processState === OrderProcessState.SUCCESS ||
+        buyOrderState.processState === OrderProcessState.FAILURE
+    ) {
+        const progress = buyOrderState.progress;
+        const hasEnded = buyOrderState.processState !== OrderProcessState.PROCESSING;
+        const expectedTimeMs = progress.expectedEndTimeUnix - progress.startTimeUnix;
+        return (
+            <Container padding="20px 20px 0px 20px" width="100%">
+                <Container marginBottom="5px">
+                    <TimeCounter estimatedTimeMs={expectedTimeMs} hasEnded={hasEnded} key={progress.startTimeUnix} />
+                </Container>
+                <TimedProgressBar expectedTimeMs={expectedTimeMs} hasEnded={hasEnded} key={progress.startTimeUnix} />
+            </Container>
+        );
+    }
+
+    return null;
+};
diff --git a/packages/instant/src/components/buy_order_state_buttons.tsx b/packages/instant/src/components/buy_order_state_buttons.tsx
index 51e06a284..5c074a67a 100644
--- a/packages/instant/src/components/buy_order_state_buttons.tsx
+++ b/packages/instant/src/components/buy_order_state_buttons.tsx
@@ -2,7 +2,7 @@ import { AssetBuyer, AssetBuyerError, BuyQuote } from '@0x/asset-buyer';
 import * as React from 'react';
 
 import { ColorOption } from '../style/theme';
-import { OrderProcessState, ZeroExInstantError } from '../types';
+import { AffiliateInfo, OrderProcessState, ZeroExInstantError } from '../types';
 
 import { BuyButton } from './buy_button';
 import { PlacingOrderButton } from './placing_order_button';
@@ -13,17 +13,17 @@ export interface BuyOrderStateButtonProps {
     buyQuote?: BuyQuote;
     buyOrderProcessingState: OrderProcessState;
     assetBuyer?: AssetBuyer;
+    affiliateInfo?: AffiliateInfo;
     onViewTransaction: () => void;
     onValidationPending: (buyQuote: BuyQuote) => void;
     onValidationFail: (buyQuote: BuyQuote, errorMessage: AssetBuyerError | ZeroExInstantError) => void;
     onSignatureDenied: (buyQuote: BuyQuote) => void;
-    onBuyProcessing: (buyQuote: BuyQuote, txHash: string) => void;
+    onBuyProcessing: (buyQuote: BuyQuote, txHash: string, startTimeUnix: number, expectedEndTimeUnix: number) => void;
     onBuySuccess: (buyQuote: BuyQuote, txHash: string) => void;
     onBuyFailure: (buyQuote: BuyQuote, txHash: string) => void;
     onRetry: () => void;
 }
 
-// TODO: rename to buttons
 export const BuyOrderStateButtons: React.StatelessComponent<BuyOrderStateButtonProps> = props => {
     if (props.buyOrderProcessingState === OrderProcessState.FAILURE) {
         return (
@@ -51,6 +51,7 @@ export const BuyOrderStateButtons: React.StatelessComponent<BuyOrderStateButtonP
         <BuyButton
             buyQuote={props.buyQuote}
             assetBuyer={props.assetBuyer}
+            affiliateInfo={props.affiliateInfo}
             onValidationPending={props.onValidationPending}
             onValidationFail={props.onValidationFail}
             onSignatureDenied={props.onSignatureDenied}
diff --git a/packages/instant/src/components/time_counter.tsx b/packages/instant/src/components/time_counter.tsx
new file mode 100644
index 000000000..f9b68163c
--- /dev/null
+++ b/packages/instant/src/components/time_counter.tsx
@@ -0,0 +1,78 @@
+import * as React from 'react';
+
+import { ONE_SECOND_MS } from '../constants';
+import { ColorOption } from '../style/theme';
+import { timeUtil } from '../util/time';
+
+import { Container } from './ui/container';
+import { Flex } from './ui/flex';
+import { Text } from './ui/text';
+
+export interface TimeCounterProps {
+    estimatedTimeMs: number;
+    hasEnded: boolean;
+}
+interface TimeCounterState {
+    elapsedSeconds: number;
+}
+
+export class TimeCounter extends React.Component<TimeCounterProps, TimeCounterState> {
+    public state = {
+        elapsedSeconds: 0,
+    };
+    private _timerId?: number;
+
+    public componentDidMount(): void {
+        this._setupTimerBasedOnProps();
+    }
+
+    public componentWillUnmount(): void {
+        this._clearTimer();
+    }
+
+    public componentDidUpdate(prevProps: TimeCounterProps): void {
+        if (prevProps.hasEnded !== this.props.hasEnded) {
+            this._setupTimerBasedOnProps();
+        }
+    }
+
+    public render(): React.ReactNode {
+        const estimatedTimeSeconds = this.props.estimatedTimeMs / ONE_SECOND_MS;
+        return (
+            <Flex justify="space-between">
+                <Container>
+                    <Container marginRight="5px" display="inline">
+                        <Text fontWeight={600} fontColor={ColorOption.grey}>
+                            Est. Time
+                        </Text>
+                    </Container>
+                    <Text fontColor={ColorOption.grey}>
+                        ({timeUtil.secondsToHumanDescription(estimatedTimeSeconds)})
+                    </Text>
+                </Container>
+                <Text fontColor={ColorOption.grey}>
+                    Time: {timeUtil.secondsToStopwatchTime(this.state.elapsedSeconds)}
+                </Text>
+            </Flex>
+        );
+    }
+
+    private _setupTimerBasedOnProps(): void {
+        this.props.hasEnded ? this._clearTimer() : this._newTimer();
+    }
+
+    private _newTimer(): void {
+        this._clearTimer();
+        this._timerId = window.setInterval(() => {
+            this.setState({
+                elapsedSeconds: this.state.elapsedSeconds + 1,
+            });
+        }, ONE_SECOND_MS);
+    }
+
+    private _clearTimer(): void {
+        if (this._timerId) {
+            window.clearInterval(this._timerId);
+        }
+    }
+}
diff --git a/packages/instant/src/components/timed_progress_bar.tsx b/packages/instant/src/components/timed_progress_bar.tsx
new file mode 100644
index 000000000..f2a6f5745
--- /dev/null
+++ b/packages/instant/src/components/timed_progress_bar.tsx
@@ -0,0 +1,78 @@
+import * as _ from 'lodash';
+import * as React from 'react';
+
+import { PROGRESS_FINISH_ANIMATION_TIME_MS, PROGRESS_STALL_AT_WIDTH } from '../constants';
+import { ColorOption, keyframes, styled } from '../style/theme';
+
+import { Container } from './ui/container';
+
+export interface TimedProgressBarProps {
+    expectedTimeMs: number;
+    hasEnded: boolean;
+}
+
+/**
+ * Timed Progress Bar
+ * Goes from 0% -> PROGRESS_STALL_AT_WIDTH over time of expectedTimeMs
+ * When hasEnded set to true, goes to 100% through animation of PROGRESS_FINISH_ANIMATION_TIME_MS length of time
+ */
+export class TimedProgressBar extends React.Component<TimedProgressBarProps, {}> {
+    private readonly _barRef = React.createRef<HTMLDivElement>();
+
+    public render(): React.ReactNode {
+        const timedProgressProps = this._calculateTimedProgressProps();
+        return (
+            <Container width="100%" backgroundColor={ColorOption.lightGrey} borderRadius="6px">
+                <TimedProgress {...timedProgressProps} ref={this._barRef as any} />
+            </Container>
+        );
+    }
+
+    private _calculateTimedProgressProps(): TimedProgressProps {
+        if (this.props.hasEnded) {
+            if (!this._barRef.current) {
+                throw new Error('ended but no reference');
+            }
+            const fromWidth = `${this._barRef.current.offsetWidth}px`;
+            return {
+                timeMs: PROGRESS_FINISH_ANIMATION_TIME_MS,
+                fromWidth,
+                toWidth: '100%',
+            };
+        }
+
+        return {
+            timeMs: this.props.expectedTimeMs,
+            fromWidth: '0px',
+            toWidth: PROGRESS_STALL_AT_WIDTH,
+        };
+    }
+}
+
+const expandingWidthKeyframes = (fromWidth: string, toWidth: string) => {
+    return keyframes`
+          from {
+              width: ${fromWidth};
+          }
+          to {
+              width: ${toWidth};
+          }
+      `;
+};
+
+interface TimedProgressProps {
+    timeMs: number;
+    fromWidth: string;
+    toWidth: string;
+}
+
+export const TimedProgress =
+    styled.div <
+    TimedProgressProps >
+    `
+    background-color: ${props => props.theme[ColorOption.primaryColor]};
+    border-radius: 6px;
+    height: 6px;
+    animation: ${props => expandingWidthKeyframes(props.fromWidth, props.toWidth)}
+      ${props => props.timeMs}ms linear 1 forwards;
+  `;
diff --git a/packages/instant/src/components/zero_ex_instant_container.tsx b/packages/instant/src/components/zero_ex_instant_container.tsx
index f734dcbd7..c1bd17502 100644
--- a/packages/instant/src/components/zero_ex_instant_container.tsx
+++ b/packages/instant/src/components/zero_ex_instant_container.tsx
@@ -5,13 +5,15 @@ import { LatestBuyQuoteOrderDetails } from '../containers/latest_buy_quote_order
 import { LatestError } from '../containers/latest_error';
 import { SelectedAssetBuyOrderStateButtons } from '../containers/selected_asset_buy_order_state_buttons';
 import { SelectedAssetInstantHeading } from '../containers/selected_asset_instant_heading';
+
+import { SelectedAssetBuyOrderProgress } from '../containers/selected_asset_buy_order_progress';
+
 import { ColorOption } from '../style/theme';
 import { zIndex } from '../style/z_index';
 
 import { SlideAnimationState } from './animations/slide_animation';
 import { SlidingPanel } from './sliding_panel';
 import { Container, Flex } from './ui';
-
 export interface ZeroExInstantContainerProps {}
 export interface ZeroExInstantContainerState {
     tokenSelectionPanelAnimationState: SlideAnimationState;
@@ -37,6 +39,7 @@ export class ZeroExInstantContainer extends React.Component<ZeroExInstantContain
                 >
                     <Flex direction="column" justify="flex-start">
                         <SelectedAssetInstantHeading onSelectAssetClick={this._handleSymbolClick} />
+                        <SelectedAssetBuyOrderProgress />
                         <LatestBuyQuoteOrderDetails />
                         <Container padding="20px" width="100%">
                             <SelectedAssetBuyOrderStateButtons />
diff --git a/packages/instant/src/components/zero_ex_instant_provider.tsx b/packages/instant/src/components/zero_ex_instant_provider.tsx
index ce939c144..59a850bc5 100644
--- a/packages/instant/src/components/zero_ex_instant_provider.tsx
+++ b/packages/instant/src/components/zero_ex_instant_provider.tsx
@@ -9,7 +9,7 @@ import { asyncData } from '../redux/async_data';
 import { INITIAL_STATE, State } from '../redux/reducer';
 import { store, Store } from '../redux/store';
 import { fonts } from '../style/fonts';
-import { AssetMetaData, Network } from '../types';
+import { AffiliateInfo, AssetMetaData, Network } from '../types';
 import { assetUtils } from '../util/asset';
 import { BigNumberInput } from '../util/big_number_input';
 import { errorFlasher } from '../util/error_flasher';
@@ -32,6 +32,7 @@ export interface ZeroExInstantProviderOptionalProps {
     defaultSelectedAssetData: string;
     additionalAssetMetaDataMap: ObjectMap<AssetMetaData>;
     networkId: Network;
+    affiliateInfo: AffiliateInfo;
 }
 
 export class ZeroExInstantProvider extends React.Component<ZeroExInstantProviderProps> {
@@ -76,6 +77,7 @@ export class ZeroExInstantProvider extends React.Component<ZeroExInstantProvider
                 ? undefined
                 : assetUtils.createAssetsFromAssetDatas(props.availableAssetDatas, completeAssetMetaDataMap, networkId),
             assetMetaDataMap: completeAssetMetaDataMap,
+            affiliateInfo: props.affiliateInfo,
         };
         return storeStateFromProps;
     }
@@ -98,7 +100,7 @@ export class ZeroExInstantProvider extends React.Component<ZeroExInstantProvider
         // warm up the gas price estimator cache just in case we can't
         // grab the gas price estimate when submitting the transaction
         // tslint:disable-next-line:no-floating-promises
-        gasPriceEstimator.getFastAmountInWeiAsync();
+        gasPriceEstimator.getGasInfoAsync();
 
         // tslint:disable-next-line:no-floating-promises
         this._flashErrorIfWrongNetwork();
diff --git a/packages/instant/src/constants.ts b/packages/instant/src/constants.ts
index 3e830ba00..15105b65c 100644
--- a/packages/instant/src/constants.ts
+++ b/packages/instant/src/constants.ts
@@ -5,6 +5,11 @@ export const DEFAULT_ZERO_EX_CONTAINER_SELECTOR = '#zeroExInstantContainer';
 export const INJECTED_DIV_ID = 'zeroExInstant';
 export const WEB_3_WRAPPER_TRANSACTION_FAILED_ERROR_MSG_PREFIX = 'Transaction failed';
 export const GWEI_IN_WEI = new BigNumber(1000000000);
+export const ONE_SECOND_MS = 1000;
+export const ONE_MINUTE_MS = ONE_SECOND_MS * 60;
 export const DEFAULT_GAS_PRICE = GWEI_IN_WEI.mul(6);
+export const DEFAULT_ESTIMATED_TRANSACTION_TIME_MS = ONE_MINUTE_MS * 2;
 export const ETH_GAS_STATION_API_BASE_URL = 'https://ethgasstation.info';
 export const COINBASE_API_BASE_URL = 'https://api.coinbase.com/v2';
+export const PROGRESS_STALL_AT_WIDTH = '95%';
+export const PROGRESS_FINISH_ANIMATION_TIME_MS = 200;
diff --git a/packages/instant/src/containers/selected_asset_buy_order_progress.ts b/packages/instant/src/containers/selected_asset_buy_order_progress.ts
new file mode 100644
index 000000000..7c8c24676
--- /dev/null
+++ b/packages/instant/src/containers/selected_asset_buy_order_progress.ts
@@ -0,0 +1,13 @@
+import { connect } from 'react-redux';
+
+import { BuyOrderProgress } from '../components/buy_order_progress';
+import { State } from '../redux/reducer';
+import { OrderState } from '../types';
+
+interface ConnectedState {
+    buyOrderState: OrderState;
+}
+const mapStateToProps = (state: State, _ownProps: {}): ConnectedState => ({
+    buyOrderState: state.buyOrderState,
+});
+export const SelectedAssetBuyOrderProgress = connect(mapStateToProps)(BuyOrderProgress);
diff --git a/packages/instant/src/containers/selected_asset_buy_order_state_buttons.ts b/packages/instant/src/containers/selected_asset_buy_order_state_buttons.ts
index 500d6b88a..72d99f844 100644
--- a/packages/instant/src/containers/selected_asset_buy_order_state_buttons.ts
+++ b/packages/instant/src/containers/selected_asset_buy_order_state_buttons.ts
@@ -7,7 +7,7 @@ import { Dispatch } from 'redux';
 import { BuyOrderStateButtons } from '../components/buy_order_state_buttons';
 import { Action, actions } from '../redux/actions';
 import { State } from '../redux/reducer';
-import { OrderProcessState, OrderState, ZeroExInstantError } from '../types';
+import { AffiliateInfo, OrderProcessState, ZeroExInstantError } from '../types';
 import { errorFlasher } from '../util/error_flasher';
 import { etherscanUtil } from '../util/etherscan';
 
@@ -15,13 +15,14 @@ interface ConnectedState {
     buyQuote?: BuyQuote;
     buyOrderProcessingState: OrderProcessState;
     assetBuyer?: AssetBuyer;
+    affiliateInfo?: AffiliateInfo;
     onViewTransaction: () => void;
 }
 
 interface ConnectedDispatch {
     onValidationPending: (buyQuote: BuyQuote) => void;
     onSignatureDenied: (buyQuote: BuyQuote) => void;
-    onBuyProcessing: (buyQuote: BuyQuote, txHash: string) => void;
+    onBuyProcessing: (buyQuote: BuyQuote, txHash: string, startTimeUnix: number, expectedEndTimeUnix: number) => void;
     onBuySuccess: (buyQuote: BuyQuote, txHash: string) => void;
     onBuyFailure: (buyQuote: BuyQuote, txHash: string) => void;
     onRetry: () => void;
@@ -32,6 +33,7 @@ const mapStateToProps = (state: State, _ownProps: SelectedAssetBuyOrderStateButt
     buyOrderProcessingState: state.buyOrderState.processState,
     assetBuyer: state.assetBuyer,
     buyQuote: state.latestBuyQuote,
+    affiliateInfo: state.affiliateInfo,
     onViewTransaction: () => {
         if (
             state.assetBuyer &&
@@ -56,24 +58,20 @@ const mapDispatchToProps = (
     ownProps: SelectedAssetBuyOrderStateButtons,
 ): ConnectedDispatch => ({
     onValidationPending: (buyQuote: BuyQuote) => {
-        const newOrderState: OrderState = { processState: OrderProcessState.VALIDATING };
-        dispatch(actions.updateBuyOrderState(newOrderState));
+        dispatch(actions.setBuyOrderStateValidating());
     },
-    onBuyProcessing: (buyQuote: BuyQuote, txHash: string) => {
-        const newOrderState: OrderState = { processState: OrderProcessState.PROCESSING, txHash };
-        dispatch(actions.updateBuyOrderState(newOrderState));
+    onBuyProcessing: (buyQuote: BuyQuote, txHash: string, startTimeUnix: number, expectedEndTimeUnix: number) => {
+        dispatch(actions.setBuyOrderStateProcessing(txHash, startTimeUnix, expectedEndTimeUnix));
     },
-    onBuySuccess: (buyQuote: BuyQuote, txHash: string) =>
-        dispatch(actions.updateBuyOrderState({ processState: OrderProcessState.SUCCESS, txHash })),
-    onBuyFailure: (buyQuote: BuyQuote, txHash: string) =>
-        dispatch(actions.updateBuyOrderState({ processState: OrderProcessState.FAILURE, txHash })),
+    onBuySuccess: (buyQuote: BuyQuote, txHash: string) => dispatch(actions.setBuyOrderStateSuccess(txHash)),
+    onBuyFailure: (buyQuote: BuyQuote, txHash: string) => dispatch(actions.setBuyOrderStateFailure(txHash)),
     onSignatureDenied: () => {
         dispatch(actions.resetAmount());
         const errorMessage = 'You denied this transaction';
         errorFlasher.flashNewErrorMessage(dispatch, errorMessage);
     },
     onValidationFail: (buyQuote, error) => {
-        dispatch(actions.updateBuyOrderState({ processState: OrderProcessState.NONE }));
+        dispatch(actions.setBuyOrderStateNone());
         if (error === ZeroExInstantError.InsufficientETH) {
             const errorMessage = "You don't have enough ETH";
             errorFlasher.flashNewErrorMessage(dispatch, errorMessage);
diff --git a/packages/instant/src/containers/selected_erc20_asset_amount_input.ts b/packages/instant/src/containers/selected_erc20_asset_amount_input.ts
index 64b6f4b3b..99999ee14 100644
--- a/packages/instant/src/containers/selected_erc20_asset_amount_input.ts
+++ b/packages/instant/src/containers/selected_erc20_asset_amount_input.ts
@@ -6,12 +6,13 @@ import * as _ from 'lodash';
 import * as React from 'react';
 import { connect } from 'react-redux';
 import { Dispatch } from 'redux';
+import { oc } from 'ts-optchain';
 
 import { ERC20AssetAmountInput } from '../components/erc20_asset_amount_input';
 import { Action, actions } from '../redux/actions';
 import { State } from '../redux/reducer';
 import { ColorOption } from '../style/theme';
-import { ERC20Asset, OrderProcessState } from '../types';
+import { AffiliateInfo, ERC20Asset, OrderProcessState } from '../types';
 import { assetUtils } from '../util/asset';
 import { BigNumberInput } from '../util/big_number_input';
 import { errorFlasher } from '../util/error_flasher';
@@ -28,10 +29,16 @@ interface ConnectedState {
     asset?: ERC20Asset;
     isDisabled: boolean;
     numberOfAssetsAvailable?: number;
+    affiliateInfo?: AffiliateInfo;
 }
 
 interface ConnectedDispatch {
-    updateBuyQuote: (assetBuyer?: AssetBuyer, value?: BigNumberInput, asset?: ERC20Asset) => void;
+    updateBuyQuote: (
+        assetBuyer?: AssetBuyer,
+        value?: BigNumberInput,
+        asset?: ERC20Asset,
+        affiliateInfo?: AffiliateInfo,
+    ) => void;
 }
 
 interface ConnectedProps {
@@ -59,6 +66,7 @@ const mapStateToProps = (state: State, _ownProps: SelectedERC20AssetAmountInputP
         asset: selectedAsset,
         isDisabled,
         numberOfAssetsAvailable,
+        affiliateInfo: state.affiliateInfo,
     };
 };
 
@@ -67,6 +75,7 @@ const updateBuyQuoteAsync = async (
     dispatch: Dispatch<Action>,
     asset: ERC20Asset,
     assetAmount: BigNumber,
+    affiliateInfo?: AffiliateInfo,
 ): Promise<void> => {
     // get a new buy quote.
     const baseUnitValue = Web3Wrapper.toBaseUnitAmount(assetAmount, asset.metaData.decimals);
@@ -74,9 +83,10 @@ const updateBuyQuoteAsync = async (
     // mark quote as pending
     dispatch(actions.setQuoteRequestStatePending());
 
+    const feePercentage = oc(affiliateInfo).feePercentage();
     let newBuyQuote: BuyQuote | undefined;
     try {
-        newBuyQuote = await assetBuyer.getBuyQuoteAsync(asset.assetData, baseUnitValue);
+        newBuyQuote = await assetBuyer.getBuyQuoteAsync(asset.assetData, baseUnitValue, { feePercentage });
     } catch (error) {
         dispatch(actions.setQuoteRequestStateFailure());
         let errorMessage;
@@ -92,7 +102,11 @@ const updateBuyQuoteAsync = async (
             const assetName = assetUtils.bestNameForAsset(asset, 'This asset');
             errorMessage = `${assetName} is currently unavailable`;
         }
-        errorFlasher.flashNewErrorMessage(dispatch, errorMessage);
+        if (!_.isUndefined(errorMessage)) {
+            errorFlasher.flashNewErrorMessage(dispatch, errorMessage);
+        } else {
+            throw error;
+        }
         return;
     }
     // We have a successful new buy quote
@@ -107,19 +121,19 @@ const mapDispatchToProps = (
     dispatch: Dispatch<Action>,
     _ownProps: SelectedERC20AssetAmountInputProps,
 ): ConnectedDispatch => ({
-    updateBuyQuote: (assetBuyer, value, asset) => {
+    updateBuyQuote: (assetBuyer, value, asset, affiliateInfo) => {
         // Update the input
         dispatch(actions.updateSelectedAssetAmount(value));
         // invalidate the last buy quote.
         dispatch(actions.updateLatestBuyQuote(undefined));
         // reset our buy state
-        dispatch(actions.updateBuyOrderState({ processState: OrderProcessState.NONE }));
+        dispatch(actions.setBuyOrderStateNone());
 
-        if (!_.isUndefined(value) && !_.isUndefined(asset) && !_.isUndefined(assetBuyer)) {
+        if (!_.isUndefined(value) && value.greaterThan(0) && !_.isUndefined(asset) && !_.isUndefined(assetBuyer)) {
             // even if it's debounced, give them the illusion it's loading
             dispatch(actions.setQuoteRequestStatePending());
             // tslint:disable-next-line:no-floating-promises
-            debouncedUpdateBuyQuoteAsync(assetBuyer, dispatch, asset, value);
+            debouncedUpdateBuyQuoteAsync(assetBuyer, dispatch, asset, value, affiliateInfo);
         }
     },
 });
@@ -134,7 +148,7 @@ const mergeProps = (
         asset: connectedState.asset,
         value: connectedState.value,
         onChange: (value, asset) => {
-            connectedDispatch.updateBuyQuote(connectedState.assetBuyer, value, asset);
+            connectedDispatch.updateBuyQuote(connectedState.assetBuyer, value, asset, connectedState.affiliateInfo);
         },
         isDisabled: connectedState.isDisabled,
         numberOfAssetsAvailable: connectedState.numberOfAssetsAvailable,
diff --git a/packages/instant/src/index.umd.ts b/packages/instant/src/index.umd.ts
index 81d59e092..a183932c6 100644
--- a/packages/instant/src/index.umd.ts
+++ b/packages/instant/src/index.umd.ts
@@ -29,6 +29,9 @@ export const render = (props: ZeroExInstantOverlayProps, selector: string = DEFA
     if (!_.isUndefined(props.zIndex)) {
         assert.isNumber('props.zIndex', props.zIndex);
     }
+    if (!_.isUndefined(props.affiliateInfo)) {
+        assert.isValidaffiliateInfo('props.affiliateInfo', props.affiliateInfo);
+    }
     const appendToIfExists = document.querySelector(selector);
     assert.assert(!_.isNull(appendToIfExists), `Could not find div with selector: ${selector}`);
     const appendTo = appendToIfExists as Element;
diff --git a/packages/instant/src/redux/actions.ts b/packages/instant/src/redux/actions.ts
index 813c5e819..879af07fc 100644
--- a/packages/instant/src/redux/actions.ts
+++ b/packages/instant/src/redux/actions.ts
@@ -4,7 +4,7 @@ import * as _ from 'lodash';
 
 import { BigNumberInput } from '../util/big_number_input';
 
-import { ActionsUnion, Asset, OrderState } from '../types';
+import { ActionsUnion, Asset } from '../types';
 
 export interface PlainAction<T extends string> {
     type: T;
@@ -25,7 +25,11 @@ function createAction<T extends string, P>(type: T, data?: P): PlainAction<T> |
 export enum ActionTypes {
     UPDATE_ETH_USD_PRICE = 'UPDATE_ETH_USD_PRICE',
     UPDATE_SELECTED_ASSET_AMOUNT = 'UPDATE_SELECTED_ASSET_AMOUNT',
-    UPDATE_BUY_ORDER_STATE = 'UPDATE_BUY_ORDER_STATE',
+    SET_BUY_ORDER_STATE_NONE = 'SET_BUY_ORDER_STATE_NONE',
+    SET_BUY_ORDER_STATE_VALIDATING = 'SET_BUY_ORDER_STATE_VALIDATING',
+    SET_BUY_ORDER_STATE_PROCESSING = 'SET_BUY_ORDER_STATE_PROCESSING',
+    SET_BUY_ORDER_STATE_FAILURE = 'SET_BUY_ORDER_STATE_FAILURE',
+    SET_BUY_ORDER_STATE_SUCCESS = 'SET_BUY_ORDER_STATE_SUCCESS',
     UPDATE_LATEST_BUY_QUOTE = 'UPDATE_LATEST_BUY_QUOTE',
     UPDATE_SELECTED_ASSET = 'UPDATE_SELECTED_ASSET',
     SET_AVAILABLE_ASSETS = 'SET_AVAILABLE_ASSETS',
@@ -41,7 +45,12 @@ export const actions = {
     updateEthUsdPrice: (price?: BigNumber) => createAction(ActionTypes.UPDATE_ETH_USD_PRICE, price),
     updateSelectedAssetAmount: (amount?: BigNumberInput) =>
         createAction(ActionTypes.UPDATE_SELECTED_ASSET_AMOUNT, amount),
-    updateBuyOrderState: (orderState: OrderState) => createAction(ActionTypes.UPDATE_BUY_ORDER_STATE, orderState),
+    setBuyOrderStateNone: () => createAction(ActionTypes.SET_BUY_ORDER_STATE_NONE),
+    setBuyOrderStateValidating: () => createAction(ActionTypes.SET_BUY_ORDER_STATE_VALIDATING),
+    setBuyOrderStateProcessing: (txHash: string, startTimeUnix: number, expectedEndTimeUnix: number) =>
+        createAction(ActionTypes.SET_BUY_ORDER_STATE_PROCESSING, { txHash, startTimeUnix, expectedEndTimeUnix }),
+    setBuyOrderStateFailure: (txHash: string) => createAction(ActionTypes.SET_BUY_ORDER_STATE_FAILURE, txHash),
+    setBuyOrderStateSuccess: (txHash: string) => createAction(ActionTypes.SET_BUY_ORDER_STATE_SUCCESS, txHash),
     updateLatestBuyQuote: (buyQuote?: BuyQuote) => createAction(ActionTypes.UPDATE_LATEST_BUY_QUOTE, buyQuote),
     updateSelectedAsset: (asset: Asset) => createAction(ActionTypes.UPDATE_SELECTED_ASSET, asset),
     setAvailableAssets: (availableAssets: Asset[]) => createAction(ActionTypes.SET_AVAILABLE_ASSETS, availableAssets),
diff --git a/packages/instant/src/redux/reducer.ts b/packages/instant/src/redux/reducer.ts
index 20d927561..179c5902e 100644
--- a/packages/instant/src/redux/reducer.ts
+++ b/packages/instant/src/redux/reducer.ts
@@ -6,6 +6,7 @@ import * as _ from 'lodash';
 
 import { assetMetaDataMap } from '../data/asset_meta_data_map';
 import {
+    AffiliateInfo,
     Asset,
     AssetMetaData,
     AsyncProcessState,
@@ -31,6 +32,7 @@ export interface State {
     quoteRequestState: AsyncProcessState;
     latestErrorMessage?: string;
     latestErrorDisplayStatus: DisplayStatus;
+    affiliateInfo?: AffiliateInfo;
 }
 
 export const INITIAL_STATE: State = {
@@ -44,6 +46,7 @@ export const INITIAL_STATE: State = {
     latestErrorMessage: undefined,
     latestErrorDisplayStatus: DisplayStatus.Hidden,
     quoteRequestState: AsyncProcessState.NONE,
+    affiliateInfo: undefined,
 };
 
 export const reducer = (state: State = INITIAL_STATE, action: Action): State => {
@@ -84,11 +87,62 @@ export const reducer = (state: State = INITIAL_STATE, action: Action): State =>
                 latestBuyQuote: undefined,
                 quoteRequestState: AsyncProcessState.FAILURE,
             };
-        case ActionTypes.UPDATE_BUY_ORDER_STATE:
+        case ActionTypes.SET_BUY_ORDER_STATE_NONE:
             return {
                 ...state,
-                buyOrderState: action.data,
+                buyOrderState: { processState: OrderProcessState.NONE },
+            };
+        case ActionTypes.SET_BUY_ORDER_STATE_VALIDATING:
+            return {
+                ...state,
+                buyOrderState: { processState: OrderProcessState.VALIDATING },
             };
+        case ActionTypes.SET_BUY_ORDER_STATE_PROCESSING:
+            const processingData = action.data;
+            const { startTimeUnix, expectedEndTimeUnix } = processingData;
+            return {
+                ...state,
+                buyOrderState: {
+                    processState: OrderProcessState.PROCESSING,
+                    txHash: processingData.txHash,
+                    progress: {
+                        startTimeUnix,
+                        expectedEndTimeUnix,
+                    },
+                },
+            };
+        case ActionTypes.SET_BUY_ORDER_STATE_FAILURE:
+            const failureTxHash = action.data;
+            if ('txHash' in state.buyOrderState) {
+                if (state.buyOrderState.txHash === failureTxHash) {
+                    const { txHash, progress } = state.buyOrderState;
+                    return {
+                        ...state,
+                        buyOrderState: {
+                            processState: OrderProcessState.FAILURE,
+                            txHash,
+                            progress,
+                        },
+                    };
+                }
+            }
+            return state;
+        case ActionTypes.SET_BUY_ORDER_STATE_SUCCESS:
+            const successTxHash = action.data;
+            if ('txHash' in state.buyOrderState) {
+                if (state.buyOrderState.txHash === successTxHash) {
+                    const { txHash, progress } = state.buyOrderState;
+                    return {
+                        ...state,
+                        buyOrderState: {
+                            processState: OrderProcessState.SUCCESS,
+                            txHash,
+                            progress,
+                        },
+                    };
+                }
+            }
+            return state;
         case ActionTypes.SET_ERROR_MESSAGE:
             return {
                 ...state,
diff --git a/packages/instant/src/types.ts b/packages/instant/src/types.ts
index b4a3aa7c3..6d66be305 100644
--- a/packages/instant/src/types.ts
+++ b/packages/instant/src/types.ts
@@ -16,12 +16,18 @@ export enum OrderProcessState {
     FAILURE = 'Failure',
 }
 
+export interface SimulatedProgress {
+    startTimeUnix: number;
+    expectedEndTimeUnix: number;
+}
+
 interface OrderStatePreTx {
     processState: OrderProcessState.NONE | OrderProcessState.VALIDATING;
 }
 interface OrderStatePostTx {
     processState: OrderProcessState.PROCESSING | OrderProcessState.SUCCESS | OrderProcessState.FAILURE;
     txHash: string;
+    progress: SimulatedProgress;
 }
 export type OrderState = OrderStatePreTx | OrderStatePostTx;
 
@@ -77,3 +83,8 @@ export enum ZeroExInstantError {
 }
 
 export type SimpleHandler = () => void;
+
+export interface AffiliateInfo {
+    feeRecipient: string;
+    feePercentage: number;
+}
diff --git a/packages/instant/src/util/assert.ts b/packages/instant/src/util/assert.ts
index 7c07215bf..d02f58625 100644
--- a/packages/instant/src/util/assert.ts
+++ b/packages/instant/src/util/assert.ts
@@ -4,7 +4,7 @@ import { assetDataUtils } from '@0x/order-utils';
 import { AssetProxyId, ObjectMap, SignedOrder } from '@0x/types';
 import * as _ from 'lodash';
 
-import { AssetMetaData } from '../types';
+import { AffiliateInfo, AssetMetaData } from '../types';
 
 export const assert = {
     ...sharedAssert,
@@ -44,4 +44,12 @@ export const assert = {
             assert.isUri(`${variableName}.imageUrl`, metaData.imageUrl);
         }
     },
+    isValidaffiliateInfo(variableName: string, affiliateInfo: AffiliateInfo): void {
+        assert.isETHAddressHex(`${variableName}.recipientAddress`, affiliateInfo.feeRecipient);
+        assert.isNumber(`${variableName}.percentage`, affiliateInfo.feePercentage);
+        assert.assert(
+            affiliateInfo.feePercentage >= 0 && affiliateInfo.feePercentage <= 0.05,
+            `Expected ${variableName}.percentage to be between 0 and 0.05, but is ${affiliateInfo.feePercentage}`,
+        );
+    },
 };
diff --git a/packages/instant/src/util/gas_price_estimator.ts b/packages/instant/src/util/gas_price_estimator.ts
index 336c4a3fa..6b15809a3 100644
--- a/packages/instant/src/util/gas_price_estimator.ts
+++ b/packages/instant/src/util/gas_price_estimator.ts
@@ -1,6 +1,11 @@
 import { BigNumber, fetchAsync } from '@0x/utils';
 
-import { DEFAULT_GAS_PRICE, ETH_GAS_STATION_API_BASE_URL, GWEI_IN_WEI } from '../constants';
+import {
+    DEFAULT_ESTIMATED_TRANSACTION_TIME_MS,
+    DEFAULT_GAS_PRICE,
+    ETH_GAS_STATION_API_BASE_URL,
+    GWEI_IN_WEI,
+} from '../constants';
 
 interface EthGasStationResult {
     average: number;
@@ -16,18 +21,25 @@ interface EthGasStationResult {
     safeLow: number;
 }
 
-const fetchFastAmountInWeiAsync = async () => {
+interface GasInfo {
+    gasPriceInWei: BigNumber;
+    estimatedTimeMs: number;
+}
+
+const fetchFastAmountInWeiAsync = async (): Promise<GasInfo> => {
     const res = await fetchAsync(`${ETH_GAS_STATION_API_BASE_URL}/json/ethgasAPI.json`);
     const gasInfo = (await res.json()) as EthGasStationResult;
     // Eth Gas Station result is gwei * 10
     const gasPriceInGwei = new BigNumber(gasInfo.fast / 10);
-    return gasPriceInGwei.mul(GWEI_IN_WEI);
+    // Time is in minutes
+    const estimatedTimeMs = gasInfo.fastWait * 60 * 1000; // Minutes to MS
+    return { gasPriceInWei: gasPriceInGwei.mul(GWEI_IN_WEI), estimatedTimeMs };
 };
 
 export class GasPriceEstimator {
-    private _lastFetched?: BigNumber;
-    public async getFastAmountInWeiAsync(): Promise<BigNumber> {
-        let fetchedAmount: BigNumber | undefined;
+    private _lastFetched?: GasInfo;
+    public async getGasInfoAsync(): Promise<GasInfo> {
+        let fetchedAmount: GasInfo | undefined;
         try {
             fetchedAmount = await fetchFastAmountInWeiAsync();
         } catch {
@@ -38,7 +50,13 @@ export class GasPriceEstimator {
             this._lastFetched = fetchedAmount;
         }
 
-        return fetchedAmount || this._lastFetched || DEFAULT_GAS_PRICE;
+        return (
+            fetchedAmount ||
+            this._lastFetched || {
+                gasPriceInWei: DEFAULT_GAS_PRICE,
+                estimatedTimeMs: DEFAULT_ESTIMATED_TRANSACTION_TIME_MS,
+            }
+        );
     }
 }
 export const gasPriceEstimator = new GasPriceEstimator();
diff --git a/packages/instant/src/util/time.ts b/packages/instant/src/util/time.ts
new file mode 100644
index 000000000..bfe69cad5
--- /dev/null
+++ b/packages/instant/src/util/time.ts
@@ -0,0 +1,39 @@
+const secondsToMinutesAndRemainingSeconds = (seconds: number): { minutes: number; remainingSeconds: number } => {
+    const minutes = Math.floor(seconds / 60);
+    const remainingSeconds = seconds - minutes * 60;
+
+    return {
+        minutes,
+        remainingSeconds,
+    };
+};
+
+const padZero = (aNumber: number): string => {
+    return aNumber < 10 ? `0${aNumber}` : aNumber.toString();
+};
+
+export const timeUtil = {
+    // converts seconds to human readable version of seconds or minutes
+    secondsToHumanDescription: (seconds: number): string => {
+        const { minutes, remainingSeconds } = secondsToMinutesAndRemainingSeconds(seconds);
+
+        if (minutes === 0) {
+            const suffix = seconds > 1 ? 's' : '';
+            return `${seconds} second${suffix}`;
+        }
+
+        const minuteSuffix = minutes > 1 ? 's' : '';
+        const minuteText = `${minutes} minute${minuteSuffix}`;
+
+        const secondsSuffix = remainingSeconds > 1 ? 's' : '';
+        const secondsText = remainingSeconds === 0 ? '' : ` ${remainingSeconds} second${secondsSuffix}`;
+
+        return `${minuteText}${secondsText}`;
+    },
+    // converts seconds to stopwatch time (i.e. 05:30 and 00:30)
+    // only goes up to minutes, not hours
+    secondsToStopwatchTime: (seconds: number): string => {
+        const { minutes, remainingSeconds } = secondsToMinutesAndRemainingSeconds(seconds);
+        return `${padZero(minutes)}:${padZero(remainingSeconds)}`;
+    },
+};
diff --git a/packages/instant/test/util/time.test.ts b/packages/instant/test/util/time.test.ts
new file mode 100644
index 000000000..fcb4e1875
--- /dev/null
+++ b/packages/instant/test/util/time.test.ts
@@ -0,0 +1,48 @@
+import { timeUtil } from '../../src/util/time';
+
+describe('timeUtil', () => {
+    describe('secondsToHumanDescription', () => {
+        const numsToResults: {
+            [aNumber: number]: string;
+        } = {
+            1: '1 second',
+            59: '59 seconds',
+            60: '1 minute',
+            119: '1 minute 59 seconds',
+            120: '2 minutes',
+            121: '2 minutes 1 second',
+            122: '2 minutes 2 seconds',
+        };
+
+        const nums = Object.keys(numsToResults);
+        nums.forEach(aNum => {
+            const numInt = parseInt(aNum, 10);
+            it(`should work for ${aNum} seconds`, () => {
+                const expectedResult = numsToResults[numInt];
+                expect(timeUtil.secondsToHumanDescription(numInt)).toEqual(expectedResult);
+            });
+        });
+    });
+    describe('secondsToStopwatchTime', () => {
+        const numsToResults: {
+            [aNumber: number]: string;
+        } = {
+            1: '00:01',
+            59: '00:59',
+            60: '01:00',
+            119: '01:59',
+            120: '02:00',
+            121: '02:01',
+            2701: '45:01',
+        };
+
+        const nums = Object.keys(numsToResults);
+        nums.forEach(aNum => {
+            const numInt = parseInt(aNum, 10);
+            it(`should work for ${aNum} seconds`, () => {
+                const expectedResult = numsToResults[numInt];
+                expect(timeUtil.secondsToStopwatchTime(numInt)).toEqual(expectedResult);
+            });
+        });
+    });
+});