Merge bitcoin/bitcoin#28950: RPC: Add maxfeerate and maxburnamount args to submitpackage

38f70ba6ac RPC: Add maxfeerate and maxburnamount args to submitpackage (Greg Sanders)

Pull request description:

  Resolves https://github.com/bitcoin/bitcoin/issues/28949

  I couldn't manage to do it very cleanly outside of (sub)package evaluation itself, since it would change the current interface very heavily. Instead I threaded through the max fee argument and used that directly via ATMPArgs. From that perspective, this is somewhat a reversion from https://github.com/bitcoin/bitcoin/pull/19339. In a post-cluster mempool world, these checks could be consolidated to right after the given (ancestor) package is linearized/chunked, by just checking the feerate of the top chunk and rejecting the submission entirely if the top chunk is too high.

  The implication here is that subpackages can be submitted to the mempool prior to hitting this new fee-based error condition.

ACKs for top commit:
  ismaelsadeeq:
    Re-ACK 38f70ba6ac 👍🏾
  glozow:
    ACK 38f70ba6ac with some non-blocking nits
  murchandamus:
    LGTM, code review ACK 38f70ba6ac

Tree-SHA512: 38212aa9de25730944cee58b0806a3d37097e42719af8dd7de91ce86bb5d9770b6f7c37354bf418bd8ba571c52947da1dcdbb968bf429dd1dbdf8715315af18f

src/test/fuzz/package_eval.cpp

@@ -277,7 +277,7 @@ FUZZ_TARGET(tx_package_eval, .init = initialize_tx_pool)
         auto single_submit = txs.size() == 1 && fuzzed_data_provider.ConsumeBool();
 
         const auto result_package = WITH_LOCK(::cs_main,
-                                    return ProcessNewPackage(chainstate, tx_pool, txs, /*test_accept=*/single_submit));
+                                    return ProcessNewPackage(chainstate, tx_pool, txs, /*test_accept=*/single_submit, /*max_sane_feerate=*/{}));
 
         // Always set bypass_limits to false because it is not supported in ProcessNewPackage and
         // can be a source of divergence.

src/test/fuzz/tx_pool.cpp

@@ -291,7 +291,7 @@ FUZZ_TARGET(tx_pool_standard, .init = initialize_tx_pool)
         // Make sure ProcessNewPackage on one transaction works.
         // The result is not guaranteed to be the same as what is returned by ATMP.
         const auto result_package = WITH_LOCK(::cs_main,
-                                    return ProcessNewPackage(chainstate, tx_pool, {tx}, true));
+                                    return ProcessNewPackage(chainstate, tx_pool, {tx}, true, /*max_sane_feerate=*/{}));
         // If something went wrong due to a package-specific policy, it might not return a
         // validation result for the transaction.
         if (result_package.m_state.GetResult() != PackageValidationResult::PCKG_POLICY) {