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-rw-r--r--packages/instant/src/components/buy_button.tsx4
-rw-r--r--packages/instant/src/components/zero_ex_instant.tsx2
-rw-r--r--packages/instant/src/types.ts1
-rw-r--r--packages/instant/src/util/gas_price_estimator.ts19
4 files changed, 17 insertions, 9 deletions
diff --git a/packages/instant/src/components/buy_button.tsx b/packages/instant/src/components/buy_button.tsx
index 93bd8e635..36cc32dbc 100644
--- a/packages/instant/src/components/buy_button.tsx
+++ b/packages/instant/src/components/buy_button.tsx
@@ -57,9 +57,9 @@ export class BuyButton extends React.Component<BuyButtonProps> {
}
let txHash: string | undefined;
- const gasPrice = await gasPriceEstimator.getFastAmountInWeiAsync();
+ const gasInfo = await gasPriceEstimator.getGasInfoAsync();
try {
- txHash = await assetBuyer.executeBuyQuoteAsync(buyQuote, { takerAddress, gasPrice });
+ txHash = await assetBuyer.executeBuyQuoteAsync(buyQuote, { takerAddress, gasPrice: gasInfo.gasPriceInWei });
} catch (e) {
if (e instanceof Error) {
if (e.message === AssetBuyerError.SignatureRequestDenied) {
diff --git a/packages/instant/src/components/zero_ex_instant.tsx b/packages/instant/src/components/zero_ex_instant.tsx
index d54dfc153..365c1610f 100644
--- a/packages/instant/src/components/zero_ex_instant.tsx
+++ b/packages/instant/src/components/zero_ex_instant.tsx
@@ -83,7 +83,7 @@ export class ZeroExInstant extends React.Component<ZeroExInstantProps> {
// 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/types.ts b/packages/instant/src/types.ts
index 336465e43..4631c9cae 100644
--- a/packages/instant/src/types.ts
+++ b/packages/instant/src/types.ts
@@ -22,6 +22,7 @@ interface OrderStatePreTx {
interface OrderStatePostTx {
processState: OrderProcessState.PROCESSING | OrderProcessState.SUCCESS | OrderProcessState.FAILURE;
txHash: string;
+ estimatedTimeMs?: number;
}
export type OrderState = OrderStatePreTx | OrderStatePostTx;
diff --git a/packages/instant/src/util/gas_price_estimator.ts b/packages/instant/src/util/gas_price_estimator.ts
index 336c4a3fa..0552ccde1 100644
--- a/packages/instant/src/util/gas_price_estimator.ts
+++ b/packages/instant/src/util/gas_price_estimator.ts
@@ -16,18 +16,25 @@ 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 +45,7 @@ export class GasPriceEstimator {
this._lastFetched = fetchedAmount;
}
- return fetchedAmount || this._lastFetched || DEFAULT_GAS_PRICE;
+ return fetchedAmount || this._lastFetched || { gasPriceInWei: DEFAULT_GAS_PRICE, estimatedTimeMs: undefined };
}
}
export const gasPriceEstimator = new GasPriceEstimator();