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-rw-r--r--packages/instant/src/util/asset_buyer_factory.ts17
-rw-r--r--packages/instant/src/util/injected_provider.ts16
-rw-r--r--packages/instant/src/util/provider_factory.ts34
-rw-r--r--packages/instant/src/util/provider_state_factory.ts69
4 files changed, 120 insertions, 16 deletions
diff --git a/packages/instant/src/util/asset_buyer_factory.ts b/packages/instant/src/util/asset_buyer_factory.ts
new file mode 100644
index 000000000..5ba46223c
--- /dev/null
+++ b/packages/instant/src/util/asset_buyer_factory.ts
@@ -0,0 +1,17 @@
+import { AssetBuyer, AssetBuyerOpts } from '@0x/asset-buyer';
+import { Provider } from 'ethereum-types';
+import * as _ from 'lodash';
+
+import { Network, OrderSource } from '../types';
+
+export const assetBuyerFactory = {
+ getAssetBuyer: (provider: Provider, orderSource: OrderSource, network: Network): AssetBuyer => {
+ const assetBuyerOptions: Partial<AssetBuyerOpts> = {
+ networkId: network,
+ };
+ const assetBuyer = _.isString(orderSource)
+ ? AssetBuyer.getAssetBuyerForStandardRelayerAPIUrl(provider, orderSource, assetBuyerOptions)
+ : AssetBuyer.getAssetBuyerForProvidedOrders(provider, orderSource, assetBuyerOptions);
+ return assetBuyer;
+ },
+};
diff --git a/packages/instant/src/util/injected_provider.ts b/packages/instant/src/util/injected_provider.ts
deleted file mode 100644
index 40f9e2da5..000000000
--- a/packages/instant/src/util/injected_provider.ts
+++ /dev/null
@@ -1,16 +0,0 @@
-import { Provider } from 'ethereum-types';
-import * as _ from 'lodash';
-
-export const getInjectedProvider = (): Provider => {
- const injectedProviderIfExists = (window as any).ethereum;
- if (!_.isUndefined(injectedProviderIfExists)) {
- // TODO: call enable here when implementing wallet connection flow
- return injectedProviderIfExists;
- }
- const injectedWeb3IfExists = (window as any).web3;
- if (!_.isUndefined(injectedWeb3IfExists.currentProvider)) {
- return injectedWeb3IfExists.currentProvider;
- } else {
- throw new Error(`No injected web3 found`);
- }
-};
diff --git a/packages/instant/src/util/provider_factory.ts b/packages/instant/src/util/provider_factory.ts
new file mode 100644
index 000000000..603f7674d
--- /dev/null
+++ b/packages/instant/src/util/provider_factory.ts
@@ -0,0 +1,34 @@
+import { EmptyWalletSubprovider, RPCSubprovider, Web3ProviderEngine } from '@0x/subproviders';
+import { Provider } from 'ethereum-types';
+import * as _ from 'lodash';
+
+import { BLOCK_POLLING_INTERVAL_MS, ETHEREUM_NODE_URL_BY_NETWORK } from '../constants';
+import { Maybe, Network } from '../types';
+
+export const providerFactory = {
+ getInjectedProviderIfExists: (): Maybe<Provider> => {
+ const injectedProviderIfExists = (window as any).ethereum;
+ if (!_.isUndefined(injectedProviderIfExists)) {
+ return injectedProviderIfExists;
+ }
+ const injectedWeb3IfExists = (window as any).web3;
+ if (!_.isUndefined(injectedWeb3IfExists) && !_.isUndefined(injectedWeb3IfExists.currentProvider)) {
+ return injectedWeb3IfExists.currentProvider;
+ }
+ return undefined;
+ },
+ getFallbackNoSigningProvider: (network: Network): Provider => {
+ const providerEngine = new Web3ProviderEngine({
+ pollingInterval: BLOCK_POLLING_INTERVAL_MS,
+ });
+ // Intercept calls to `eth_accounts` and always return empty
+ providerEngine.addProvider(new EmptyWalletSubprovider());
+ // Construct an RPC subprovider, all data based requests will be sent via the RPCSubprovider
+ // TODO(bmillman): make this more resilient to infura failures
+ const rpcUrl = ETHEREUM_NODE_URL_BY_NETWORK[network];
+ providerEngine.addProvider(new RPCSubprovider(rpcUrl));
+ // // Start the Provider Engine
+ providerEngine.start();
+ return providerEngine;
+ },
+};
diff --git a/packages/instant/src/util/provider_state_factory.ts b/packages/instant/src/util/provider_state_factory.ts
new file mode 100644
index 000000000..18b188d89
--- /dev/null
+++ b/packages/instant/src/util/provider_state_factory.ts
@@ -0,0 +1,69 @@
+import { Web3Wrapper } from '@0x/web3-wrapper';
+import { Provider } from 'ethereum-types';
+import * as _ from 'lodash';
+
+import { AccountNotReady, AccountState, Maybe, Network, OrderSource, ProviderState } from '../types';
+
+import { assetBuyerFactory } from './asset_buyer_factory';
+import { providerFactory } from './provider_factory';
+
+const LOADING_ACCOUNT: AccountNotReady = {
+ state: AccountState.Loading,
+};
+const NO_ACCOUNT: AccountNotReady = {
+ state: AccountState.None,
+};
+
+export const providerStateFactory = {
+ getInitialProviderState: (orderSource: OrderSource, network: Network, provider?: Provider): ProviderState => {
+ if (!_.isUndefined(provider)) {
+ return providerStateFactory.getInitialProviderStateFromProvider(orderSource, network, provider);
+ }
+ const providerStateFromWindowIfExits = providerStateFactory.getInitialProviderStateFromWindowIfExists(
+ orderSource,
+ network,
+ );
+ if (providerStateFromWindowIfExits) {
+ return providerStateFromWindowIfExits;
+ } else {
+ return providerStateFactory.getInitialProviderStateFallback(orderSource, network);
+ }
+ },
+ getInitialProviderStateFromProvider: (
+ orderSource: OrderSource,
+ network: Network,
+ provider: Provider,
+ ): ProviderState => {
+ const providerState: ProviderState = {
+ provider,
+ web3Wrapper: new Web3Wrapper(provider),
+ assetBuyer: assetBuyerFactory.getAssetBuyer(provider, orderSource, network),
+ account: LOADING_ACCOUNT,
+ };
+ return providerState;
+ },
+ getInitialProviderStateFromWindowIfExists: (orderSource: OrderSource, network: Network): Maybe<ProviderState> => {
+ const injectedProviderIfExists = providerFactory.getInjectedProviderIfExists();
+ if (!_.isUndefined(injectedProviderIfExists)) {
+ const providerState: ProviderState = {
+ provider: injectedProviderIfExists,
+ web3Wrapper: new Web3Wrapper(injectedProviderIfExists),
+ assetBuyer: assetBuyerFactory.getAssetBuyer(injectedProviderIfExists, orderSource, network),
+ account: LOADING_ACCOUNT,
+ };
+ return providerState;
+ } else {
+ return undefined;
+ }
+ },
+ getInitialProviderStateFallback: (orderSource: OrderSource, network: Network): ProviderState => {
+ const provider = providerFactory.getFallbackNoSigningProvider(network);
+ const providerState: ProviderState = {
+ provider,
+ web3Wrapper: new Web3Wrapper(provider),
+ assetBuyer: assetBuyerFactory.getAssetBuyer(provider, orderSource, network),
+ account: NO_ACCOUNT,
+ };
+ return providerState;
+ },
+};