private Transaction createTransaction(final int transactionNumber) {
    return Transaction.builder()
        .type(TransactionType.FRONTIER)
        .gasLimit(100)
        .gasPrice(Wei.ZERO)
        .nonce(0)
        .payload(Bytes.EMPTY)
        .to(Address.ID)
        .value(Wei.of(transactionNumber))
        .sender(Address.ID)
        .chainId(BigInteger.ONE)
        .signAndBuild(keyPair);
  }
Determines whether a specified filter exists.

@param filterId The filter ID to check.
@return A boolean - true if the filter exists, false if not.
ethereum/api/src/integration-test/java/org/hyperledger/besu/ethereum/api/jsonrpc/methods/fork/london/EthGetFilterChangesIntegrationTest.java