feat: fetch options plugin (#255)

README.md

@@ -588,6 +588,25 @@ An example - LMDB - implementation is available [here](https://github.com/warp-c
 
 A dedicated CLI which eases the process of using main methods of the Warp SDK library has been created. Please refer to [`warp-contracts-cli` npm page](https://www.npmjs.com/package/warp-contracts-cli) for more details.
 
+### Customize `fetch` options
+
+It is possible to customize `fetch` options using dedicated plugin. In order to change `fetch` options one needs to create an implementation of [WarpPlugin](https://github.com/warp-contracts/warp/blob/main/src/core/WarpPlugin.ts) interface. `process` method will receive following properties:
+
+```ts
+interface FetchRequest {
+  input: RequestInfo | URL;
+  init: Partial<RequestInit>;
+}
+```
+
+...and it should return updated `fetch` options (by returning updated `init` object). An example of such implementation in [src/tools/fetch-options-plugin.ts](https://github.com/warp-contracts/warp/tree/main/tools/fetch-options-plugin.ts).
+
+In order to use this plugin, it needs to be attached while creating `Warp` instance, e.g.:
+
+```ts
+const warp = WarpFactory.forMainnet().use(new FetchOptionsPlugin());
+```
+
 ### Migrations
 
 #### old factories to WarpFactory

src/contract/HandlerBasedContract.ts

@@ -36,6 +36,7 @@ import { generateMockVrf } from '../utils/vrf';
 import { Signature, SignatureType } from './Signature';
 import { ContractDefinition } from '../core/ContractDefinition';
 import { EvaluationOptionsEvaluator } from './EvaluationOptionsEvaluator';
+import { WarpFetchWrapper } from '../core/WarpFetchWrapper';
 
 /**
  * An implementation of {@link Contract} that is backwards compatible with current style
@@ -59,6 +60,7 @@ export class HandlerBasedContract<State> implements Contract<State> {
   private _sorter: InteractionsSorter;
   private _rootSortKey: string;
   private signature: Signature;
+  private warpFetchWrapper: WarpFetchWrapper;
 
   constructor(
     private readonly _contractTxId: string,
@@ -113,6 +115,7 @@ export class HandlerBasedContract<State> implements Contract<State> {
     }
 
     this.getCallStack = this.getCallStack.bind(this);
+    this.warpFetchWrapper = new WarpFetchWrapper(this.warp);
   }
 
   async readState(
@@ -301,7 +304,8 @@ export class HandlerBasedContract<State> implements Contract<State> {
       options.vrf
     );
 
-    const response = await fetch(`${this._evaluationOptions.sequencerUrl}gateway/sequencer/register`, {
+    const response = await this.warpFetchWrapper
+      .fetch(`${this._evaluationOptions.sequencerUrl}gateway/sequencer/register`, {
         method: 'POST',
         body: JSON.stringify(interactionTx),
         headers: {
@@ -746,7 +750,8 @@ export class HandlerBasedContract<State> implements Contract<State> {
 
   async syncState(externalUrl: string, params?: any): Promise<Contract> {
     const { stateEvaluator } = this.warp;
-    const response = await fetch(
+    const response = await this.warpFetchWrapper
+      .fetch(
         `${externalUrl}?${new URLSearchParams({
           id: this._contractTxId,
           ...params

src/contract/deploy/impl/DefaultCreateContract.ts

@@ -2,11 +2,20 @@
 import Arweave from 'arweave';
 import Transaction from 'arweave/node/lib/transaction';
 import { Signature, SignatureType } from '../../../contract/Signature';
+import { WarpFetchWrapper } from '../../../core/WarpFetchWrapper';
 import { SmartWeaveTags } from '../../../core/SmartWeaveTags';
 import { Warp } from '../../../core/Warp';
 import { WARP_GW_URL } from '../../../core/WarpFactory';
 import { LoggerFactory } from '../../../logging/LoggerFactory';
-import { CreateContract, ContractData, ContractDeploy, FromSrcTxContractData, ArWallet, BundlrNodeType, BUNDLR_NODES } from '../CreateContract';
+import {
+  CreateContract,
+  ContractData,
+  ContractDeploy,
+  FromSrcTxContractData,
+  ArWallet,
+  BundlrNodeType,
+  BUNDLR_NODES
+} from '../CreateContract';
 import { SourceData, SourceImpl } from './SourceImpl';
 import { Buffer } from 'redstone-isomorphic';
 
@@ -15,10 +24,12 @@ export class DefaultCreateContract implements CreateContract {
   private readonly source: SourceImpl;
 
   private signature: Signature;
+  private readonly warpFetchWrapper: WarpFetchWrapper;
 
   constructor(private readonly arweave: Arweave, private warp: Warp) {
     this.deployFromSourceTx = this.deployFromSourceTx.bind(this);
     this.source = new SourceImpl(this.warp);
+    this.warpFetchWrapper = new WarpFetchWrapper(this.warp);
   }
 
   async deploy(contractData: ContractData, disableBundling?: boolean): Promise<ContractDeploy> {
@@ -190,7 +201,7 @@ export class DefaultCreateContract implements CreateContract {
       };
     }
 
-    const response = await fetch(`${WARP_GW_URL}/gateway/contracts/deploy`, {
+    const response = await this.warpFetchWrapper.fetch(`${WARP_GW_URL}/gateway/contracts/deploy`, {
       method: 'POST',
       body: JSON.stringify(body),
       headers: {

src/core/WarpFetchWrapper.ts

@@ -0,0 +1,37 @@
+import { LoggerFactory } from '../logging/LoggerFactory';
+import { Warp } from './Warp';
+
+export interface FetchRequest {
+  input: RequestInfo | URL;
+  init: Partial<RequestInit>;
+}
+
+export class WarpFetchWrapper {
+  private readonly name = 'WarpFetchWrapper';
+  private readonly logger = LoggerFactory.INST.create(this.name);
+
+  constructor(private warp: Warp) {
+    this.warp = warp;
+  }
+
+  fetch(input: RequestInfo | URL, init?: RequestInit): Promise<Response> {
+    let fetchOptions: RequestInit;
+
+    if (this.warp.hasPlugin('fetch-options')) {
+      const fetchOptionsPlugin = this.warp.loadPlugin<FetchRequest, Partial<RequestInit>>('fetch-options');
+      try {
+        const updatedFetchOptions = fetchOptionsPlugin.process({ input, init: init || {} });
+        fetchOptions = { ...init, ...updatedFetchOptions };
+      } catch (e) {
+        if (e.message) {
+          this.logger.error(e.message);
+        }
+        throw new Error(`Unable to process fetch options: ${e.message}`);
+      }
+    } else {
+      fetchOptions = init;
+    }
+
+    return fetch(input, fetchOptions);
+  }
+}

src/core/WarpPlugin.ts

@@ -4,7 +4,8 @@ export const knownWarpPlugins = [
   'smartweave-extension-ethers',
   'subscription',
   'ivm-handler-api',
-  'evaluation-progress'
+  'evaluation-progress',
+  'fetch-options'
 ] as const;
 export type WarpPluginType = typeof knownWarpPlugins[number];
 

tools/fetch-options-plugin.ts

@@ -0,0 +1,70 @@
+import { WarpPlugin, WarpPluginType } from '../src/core/WarpPlugin';
+import { FetchRequest } from '../src/core/WarpFetchWrapper';
+import { JWKInterface } from 'arweave/node/lib/wallet';
+import fs from 'fs';
+import path from 'path';
+import { LoggerFactory } from '../src/logging/LoggerFactory';
+import { defaultCacheOptions, WarpFactory } from '../src/core/WarpFactory';
+
+class FetchOptionsPlugin implements WarpPlugin<FetchRequest, RequestInit> {
+  process(request: FetchRequest): Partial<RequestInit> {
+    const url = request.input;
+
+    let fetchOptions: Partial<RequestInit> = {};
+
+    if (url == `https://d1o5nlqr4okus2.cloudfront.net/gateway/sequencer/register`) {
+      fetchOptions = {
+        keepalive: true
+      };
+    }
+
+    return fetchOptions;
+  }
+
+  type(): WarpPluginType {
+    return 'fetch-options';
+  }
+}
+
+async function main() {
+  const wallet: JWKInterface = readJSON('./.secrets/jwk.json');
+  LoggerFactory.INST.logLevel('debug');
+  const logger = LoggerFactory.INST.create('FetchOptionsPlugin');
+
+  try {
+    const warp = WarpFactory.forMainnet({ ...defaultCacheOptions, inMemory: true }).use(new FetchOptionsPlugin());
+
+    const jsContractSrc = fs.readFileSync(path.join(__dirname, 'data/js/token-pst.js'), 'utf8');
+    const initialState = fs.readFileSync(path.join(__dirname, 'data/js/token-pst.json'), 'utf8');
+
+    const { contractTxId } = await warp.createContract.deploy({
+      wallet,
+      initState: initialState,
+      src: jsContractSrc
+    });
+
+    const contract = warp.contract(contractTxId).connect(wallet);
+
+    await contract.writeInteraction({
+      function: 'transfer',
+      target: 'uhE-QeYS8i4pmUtnxQyHD7dzXFNaJ9oMK-IM-QPNY6M',
+      qty: 55555
+    });
+
+    const { cachedValue } = await contract.readState();
+    logger.info(`Cached value: ${cachedValue}`);
+  } catch (e) {
+    logger.error(e);
+  }
+}
+
+export function readJSON(path: string): JWKInterface {
+  const content = fs.readFileSync(path, 'utf-8');
+  try {
+    return JSON.parse(content);
+  } catch (e) {
+    throw new Error(`File "${path}" does not contain a valid JSON`);
+  }
+}
+
+main().catch((e) => console.error(e));