chore(ethereum-storage): add getter for eip-1559 support (#1466)

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

@@ -75,7 +75,12 @@ export class EthereumTransactionSubmitter implements StorageTypes.ITransactionSu
     this.enableEip1559 = await isEip1559Supported(this.provider, this.logger);
   }
 
-  /** Submits an IPFS hash, with fees according to `ipfsSize`  */
+  /** Returns whether EIP-1559 is supported by the underlying provider. */
+  supportsEip1559() {
+    return this.enableEip1559;
+  }
+
+  /** Submits an IPFS hash, with fees according to `ipfsSize` */
   async submit(ipfsHash: string, ipfsSize: number): Promise<ContractTransaction> {
     const preparedTransaction = await this.prepareSubmit(ipfsHash, ipfsSize);
     return await this.hashSubmitter.signer.sendTransaction(preparedTransaction);

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

@@ -13,17 +13,23 @@ describe(EthereumTransactionSubmitter, () => {
     await txSubmitter.initialize();
   });
 
+  it('can retrieve whether the provider supports eip-1559', () => {
+    expect(txSubmitter.supportsEip1559()).toBe(true);
+  });
+
   it('can prepareSubmit', async () => {
     expect(await txSubmitter.prepareSubmit('hash', 1)).toMatchObject({
       to: '0xf25186b5081ff5ce73482ad761db0eb0d25abfbf',
       data: /^0x.+/,
       value: BigNumber.from(0),
     });
   });
+
   it('can submit', async () => {
     const tx = await txSubmitter.submit('hash', 1);
     expect(tx.hash).toMatch(/^0x.+/);
   });
+
   it('can debug transactions', async () => {
     const debugMock = jest.fn();
     const logger = {