chore: add utility function to check eip1559 compliance

packages/ethereum-storage/src/ethereum-tx-submitter.ts

@@ -4,7 +4,7 @@ import { requestHashSubmitterArtifact } from '@requestnetwork/smart-contracts';
 import { RequestOpenHashSubmitter } from '@requestnetwork/smart-contracts/types';
 import { SubmitterProps } from './ethereum-storage-ethers';
 import { GasFeeDefiner } from './gas-fee-definer';
-import { SimpleLogger } from '@requestnetwork/utils';
+import { SimpleLogger, isEip1559Supported } from '@requestnetwork/utils';
 
 /**
  * Handles the submission of a hash on the request HashSubmitter contract
@@ -32,14 +32,7 @@ export class EthereumTransactionSubmitter {
   }
 
   async initialize(): Promise<void> {
-    try {
-      await this.provider.send('eth_feeHistory', [1, 'latest', []]);
-    } catch (e) {
-      this.logger.warn(
-        'This RPC provider does not support the "eth_feeHistory" method: switching to legacy gas price',
-      );
-      this.enableEip1559 = false;
-    }
+    this.enableEip1559 = await isEip1559Supported(this.provider, this.logger);
   }
 
   /** Submits an IPFS hash, with fees according to `ipfsSize`  */

packages/smart-contracts/scripts-create2/contract-setup/adminTasks.ts

@@ -4,7 +4,12 @@ import * as artifacts from '../../src/lib';
 import { BigNumber, Overrides, Wallet } from 'ethers';
 import { HardhatRuntimeEnvironmentExtended } from '../types';
 import { parseUnits } from 'ethers/lib/utils';
-import { estimateGasFees, getCeloProvider, getDefaultProvider } from '@requestnetwork/utils';
+import {
+  estimateGasFees,
+  isEip1559Supported,
+  getCeloProvider,
+  getDefaultProvider,
+} from '@requestnetwork/utils';
 
 // Fees: 0.5%
 export const REQUEST_SWAP_FEES = 5;
@@ -249,12 +254,9 @@ export const getSignerAndGasFees = async (
   }
   const signer = new hre.ethers.Wallet(hre.config.xdeploy.signer).connect(provider);
 
-  let txOverrides;
-  try {
-    txOverrides = await estimateGasFees({ provider });
-  } catch (err) {
-    txOverrides = {};
-  }
+  const txOverrides = (await isEip1559Supported(provider))
+    ? await estimateGasFees({ provider })
+    : {};
 
   return {
     signer,

packages/smart-contracts/scripts-create2/xdeployer.ts

@@ -1,7 +1,12 @@
 import { HardhatRuntimeEnvironmentExtended, IDeploymentParams, IDeploymentResult } from './types';
 import { requestDeployer } from '../src/lib';
 import { Overrides } from 'ethers';
-import { estimateGasFees, getCeloProvider, getDefaultProvider } from '@requestnetwork/utils';
+import {
+  estimateGasFees,
+  getCeloProvider,
+  getDefaultProvider,
+  isEip1559Supported,
+} from '@requestnetwork/utils';
 
 const ZERO_ETH_INPUT = 0;
 
@@ -71,17 +76,12 @@ export const xdeploy = async (
     let receipt = undefined;
     let deployed = false;
     let error = undefined;
-    let txOverrides: Overrides;
+    let txOverrides: Overrides = {};
 
-    try {
+    if (await isEip1559Supported(provider, console)) {
       txOverrides = await estimateGasFees({ provider });
-      const gasLimit = hre.config.xdeploy.gasLimit;
-      txOverrides.gasLimit = gasLimit;
-    } catch (e) {
-      // NOTE: On some networks utils.estimateGasFees do not work
-      txOverrides = {};
-      console.log('Cannot estimate gasLimit');
     }
+    txOverrides.gasLimit = hre.config.xdeploy.gasLimit;
 
     try {
       const createReceipt = await (

packages/utils/src/index.ts

@@ -42,6 +42,7 @@ export {
 export {
   setProviderFactory,
   initPaymentDetectionApiKeys,
+  isEip1559Supported,
   getDefaultProvider,
   getCeloProvider,
   networkRpcs,

packages/utils/src/providers.ts

@@ -1,3 +1,5 @@
+import { LogTypes } from '@requestnetwork/types';
+
 import { providers, constants } from 'ethers';
 
 type ProviderFactory = (network: string | undefined) => providers.Provider | string;
@@ -147,9 +149,26 @@ const getCeloProvider = (): providers.Provider => {
   return provider;
 };
 
+const isEip1559Supported = async (
+  provider: providers.Provider | providers.JsonRpcProvider,
+  logger?: LogTypes.ILogger,
+): Promise<boolean> => {
+  try {
+    await (provider as providers.JsonRpcProvider).send('eth_feeHistory', [1, 'latest', []]);
+    return true;
+  } catch (e) {
+    logger &&
+      logger.warn(
+        'This RPC provider does not support the "eth_feeHistory" method: switching to legacy gas price',
+      );
+    return false;
+  }
+};
+
 export {
   setProviderFactory,
   initPaymentDetectionApiKeys,
+  isEip1559Supported,
   getDefaultProvider,
   getCeloProvider,
   networkRpcs,