fix(api_server): fix blob_gas length

core/node/api_server/src/web3/namespaces/eth.rs

@@ -689,6 +689,8 @@ impl EthNamespace {
         effective_pubdata_price_history.reverse();
 
         let oldest_block = newest_l2_block.0 + 1 - base_fee_per_gas.len() as u32;
+        // `base_fee_per_gas` for next L2 block cannot be calculated, appending last fee as a placeholder.
+        base_fee_per_gas.push(*base_fee_per_gas.last().unwrap());
         // We do not store gas used ratio for blocks, returns array of zeroes as a placeholder.
         let gas_used_ratio = vec![0.0; base_fee_per_gas.len()];
         // Effective priority gas price is currently 0.
@@ -701,8 +703,6 @@ impl EthNamespace {
         let base_fee_per_blob_gas = vec![U256::zero(); base_fee_per_gas.len()];
         let blob_gas_used_ratio = vec![0.0; base_fee_per_gas.len()];
 
-        // `base_fee_per_gas` for next L2 block cannot be calculated, appending last fee as a placeholder.
-        base_fee_per_gas.push(*base_fee_per_gas.last().unwrap());
         Ok(FeeHistory {
             inner: web3::FeeHistory {
                 oldest_block: zksync_types::web3::BlockNumber::Number(oldest_block.into()),

core/tests/ts-integration/tests/api/web3.test.ts

@@ -881,6 +881,7 @@ describe('web3 API compatibility tests', () => {
             const expectedBaseFee = (await alice.provider.getBlock(receipt.blockNumber - 1 + i)).baseFeePerGas;
             expect(BigInt(response.baseFeePerGas[i])).toEqual(expectedBaseFee);
         }
+        expect(response.baseFeePerBlobGas).toHaveLength(3);
     });
 
     test('Should check zks_getProtocolVersion endpoint', async () => {