remove gas price calls

Author: dglowinski

src/swapService/strategies/balmySDK/stubGasPriceSource.ts

@@ -0,0 +1,37 @@
+import type {
+  ChainId,
+  FieldsRequirements,
+  IProviderService,
+  SupportRecord,
+  TimeString,
+} from "@balmy/sdk"
+import type {
+  GasPriceResult,
+  GasValueForVersions,
+  IGasPriceSource,
+} from "@balmy/sdk/dist/services/gas/types"
+
+// Stub out gas price calculations to make sure not to hit RPCs
+type GasValues = GasValueForVersions<"standard">
+export class StubGasPriceSource implements IGasPriceSource<GasValues> {
+  constructor(private readonly providerService: IProviderService) {}
+
+  supportedSpeeds() {
+    const support: SupportRecord<GasValues> = { standard: "present" }
+    return Object.fromEntries(
+      this.providerService
+        .supportedChains()
+        .map((chainId) => [Number(chainId), support]),
+    )
+  }
+
+  getGasPrice<Requirements extends FieldsRequirements<GasValues>>() {
+    return Promise.resolve({
+      standard: {
+        maxFeePerGas: 0,
+        maxPriorityFeePerGas: 0,
+        gasPrice: 0,
+      },
+    }) as unknown as Promise<GasPriceResult<GasValues, Requirements>>
+  }
+}

src/swapService/strategies/strategyBalmySDK.ts

@@ -40,6 +40,7 @@ import {
   quoteToRoute,
 } from "../utils"
 import { CustomSourceList } from "./balmySDK/customSourceList"
+import { StubGasPriceSource } from "./balmySDK/stubGasPriceSource"
 import { TokenlistMetadataSource } from "./balmySDK/tokenlistMetadataSource"
 
 const DAO_MULTISIG = "0xcAD001c30E96765aC90307669d578219D4fb1DCe"
@@ -88,7 +89,15 @@ export class StrategyBalmySDK {
   constructor(match = {}, config?: BalmyStrategyConfig) {
     this.config = { ...defaultConfig, ...(config || {}) }
     const fetchService = buildFetchService()
-    const providerService = buildProviderService()
+    const providerService = buildProviderService({
+      source: {
+        type: "public-rpcs",
+        rpcsPerChain: combinePublicAndPrivateRPCs(),
+        config: {
+          type: "fallback",
+        },
+      },
+    })
 
     const buildParams: BuildParams = {
       quotes: {
@@ -153,6 +162,12 @@ export class StrategyBalmySDK {
           },
         },
       },
+      gas: {
+        source: {
+          type: "custom",
+          instance: new StubGasPriceSource(providerService),
+        },
+      },
     } as BuildParams
     this.sdk = buildSDK(buildParams)
     this.match = match