[rpc] return full string for package_msg and package-error

Author: glozow

src/rpc/mempool.cpp

@@ -199,7 +199,7 @@ static RPCHelpMan testmempoolaccept()
                 result_inner.pushKV("txid", tx->GetHash().GetHex());
                 result_inner.pushKV("wtxid", tx->GetWitnessHash().GetHex());
                 if (package_result.m_state.GetResult() == PackageValidationResult::PCKG_POLICY) {
-                    result_inner.pushKV("package-error", package_result.m_state.GetRejectReason());
+                    result_inner.pushKV("package-error", package_result.m_state.ToString());
                 }
                 auto it = package_result.m_tx_results.find(tx->GetWitnessHash());
                 if (exit_early || it == package_result.m_tx_results.end()) {
@@ -909,7 +909,7 @@ static RPCHelpMan submitpackage()
                 case PackageValidationResult::PCKG_TX:
                 {
                     // Package-wide error we want to return, but we also want to return individual responses
-                    package_msg = package_result.m_state.GetRejectReason();
+                    package_msg = package_result.m_state.ToString();
                     CHECK_NONFATAL(package_result.m_tx_results.size() == txns.size() ||
                             package_result.m_tx_results.empty());
                     break;

test/functional/mempool_package_limits.py

@@ -29,7 +29,7 @@ def func_wrapper(self, *args, **kwargs):
         testres_error_expected = node.testmempoolaccept(rawtxs=package_hex)
         assert_equal(len(testres_error_expected), len(package_hex))
         for txres in testres_error_expected:
-            assert_equal(txres["package-error"], "package-mempool-limits")
+            assert "package-mempool-limits" in txres["package-error"]
 
         # Clear mempool and check that the package passes now
         self.generate(node, 1)

test/functional/mempool_sigoplimit.py

@@ -165,7 +165,8 @@ def create_bare_multisig_tx(utxo_to_spend=None):
         # But together, it's exceeding limits in the *package* context. If sigops adjusted vsize wasn't being checked
         # here, it would get further in validation and give too-long-mempool-chain error instead.
         packet_test = self.nodes[0].testmempoolaccept([tx_parent.serialize().hex(), tx_child.serialize().hex()])
-        assert_equal([x["package-error"] for x in packet_test], ["package-mempool-limits", "package-mempool-limits"])
+        expected_package_error = f"package-mempool-limits, package size {2*20*5000} exceeds ancestor size limit [limit: 101000]"
+        assert_equal([x["package-error"] for x in packet_test], [expected_package_error] * 2)
 
         # When we actually try to submit, the parent makes it into the mempool, but the child would exceed ancestor vsize limits
         res = self.nodes[0].submitpackage([tx_parent.serialize().hex(), tx_child.serialize().hex()])