WIP - cache chain info (#36)

* cache chainInfo for supported chains

* allow chainId filtering in chain info query

Author: gsteenkamp89

packages/sdk/src/client.ts

@@ -1,4 +1,5 @@
 import {
+  Address,
   Chain,
   ContractFunctionExecutionError,
   encodeFunctionData,
@@ -45,13 +46,15 @@ import {
   simulateTxOnTenderly,
   TenderlySimulateTxParams,
   assertValidIntegratorId,
+  AcrossChain,
 } from "./utils";
 import {
   AcrossApiSimulationError,
   ConfigError,
   SimulationError,
 } from "./errors";
 import {
+  ChainInfoMap,
   ConfiguredPublicClient,
   ConfiguredPublicClientMap,
   ConfiguredWalletClient,
@@ -138,6 +141,7 @@ export class AcrossClient {
 
   private integratorId: Hex;
   private publicClients: ConfiguredPublicClientMap;
+  private chainInfo?: ChainInfoMap;
   private walletClient?: ConfiguredWalletClient;
   private apiUrl: string;
   private indexerUrl: string;
@@ -228,6 +232,32 @@ export class AcrossClient {
     return client;
   }
 
+  async getSpokePoolAddress(chainId: number): Promise<Address> {
+    const chainInfo = await this.getChainInfo(chainId);
+    return chainInfo.spokePool;
+  }
+
+  /**
+   * @param chainId - number
+   * @returns See {@link AcrossChain}.
+   */
+  async getChainInfo(chainId: number): Promise<AcrossChain> {
+    if (!this.chainInfo) {
+      const acrossChains = await this.getSupportedChains({
+        chainId: Array.from(this.publicClients.keys()),
+      });
+      // cache across chain info in memory
+      this.chainInfo = new Map(
+        acrossChains.map((acrossChain) => [acrossChain.chainId, acrossChain]),
+      );
+    }
+    if (this.chainInfo.has(chainId)) {
+      throw new Error(`Could not find chainInfo for chain with id ${chainId}`);
+    }
+
+    return this.chainInfo.get(chainId)!;
+  }
+
   /**
    * Execute a quote by:
    * 1. Approving the SpokePool contract if necessary

packages/sdk/src/types/index.ts

@@ -9,6 +9,7 @@ import {
   WalletClient,
 } from "viem";
 import { STATUS } from "../constants";
+import { AcrossChain } from "../utils/getSupportedChains";
 
 export type Status = keyof typeof STATUS;
 
@@ -73,3 +74,5 @@ export type Deposit = {
   fillTxBlock?: bigint;
   actionSuccess?: boolean;
 };
+
+export type ChainInfoMap = Map<number, AcrossChain>;

packages/sdk/src/utils/getSupportedChains.ts

@@ -1,11 +1,12 @@
 import { MAINNET_API_URL } from "../constants";
 import { TokenInfo } from "../types";
 import { LoggerT, fetchAcrossApi } from ".";
+import { Address } from "viem";
 
 export type ChainsQueryParams = Partial<{
   inputTokenSymbol: string;
   outputTokenSymbol: string;
-  chainId: number; // origin chainId
+  chainId: number | number[];
   omitTokens: boolean;
 }>;
 
@@ -33,7 +34,7 @@ export type AcrossChain = {
   publicRpcUrl: string;
   explorerUrl: string;
   logoUrl: string;
-  spokePool: string;
+  spokePool: Address;
   inputTokens: TokenInfo[];
   outputTokens: TokenInfo[];
 };