feat: added caching for vaults get (#114)

* feat: added caching for vaults get

* chore: linted

src/cache.ts

@@ -14,7 +14,7 @@ export class CachedFetcher<T> {
     this.chainId = chainId;
   }
 
-  async fetch(): Promise<T | undefined> {
+  async fetch(queryParameters?: string): Promise<T | undefined> {
     if (!this.ctx.cache.useCache || !this.ctx.cache.url) {
       return undefined;
     }
@@ -24,7 +24,12 @@ export class CachedFetcher<T> {
       return cached;
     }
 
-    const call = await fetch(`${this.ctx.cache.url}/v1/chains/${this.chainId}/${this.path}`);
+    let path = `${this.ctx.cache.url}/v1/chains/${this.chainId}/${this.path}`;
+    if (queryParameters) {
+      path += `?${queryParameters}`;
+    }
+
+    const call = await fetch(path);
     if (call.status !== 200) {
       const { url, status, statusText } = call;
       console.warn(`Call to cache failed at ${url} (status ${status} ${statusText})`);

src/interfaces/vault.ts

@@ -3,6 +3,7 @@ import { CallOverrides, Contract } from "@ethersproject/contracts";
 import { TransactionRequest, TransactionResponse } from "@ethersproject/providers";
 import { JsonRpcSigner } from "@ethersproject/providers";
 
+import { CachedFetcher } from "../cache";
 import { ChainId } from "../chain";
 import { ServiceInterface } from "../common";
 import { chunkArray, EthAddress, WethAddress } from "../helpers";
@@ -27,13 +28,20 @@ import { Position, Vault } from "../types";
 const VaultAbi = ["function deposit(uint256 amount) public", "function withdraw(uint256 amount) public"];
 
 export class VaultInterface<T extends ChainId> extends ServiceInterface<T> {
+  private cachedFetcher = new CachedFetcher<Vault[]>("vaults/get", this.ctx, this.chainId);
+
   /**
    * Get all yearn vaults.
    * @param addresses filter, if not provided all positions are returned
    * @param overrides
    * @returns
    */
   async get(addresses?: Address[], overrides?: CallOverrides): Promise<Vault[]> {
+    const cached = await this.cachedFetcher.fetch(addresses ? `addresses=${addresses.join()}` : undefined);
+    if (cached) {
+      return cached;
+    }
+
     const assetsStatic = await this.getStatic(addresses, overrides);
     let assetsDynamic: VaultDynamic[] = [];
     try {