Fix promotion to prioritized layer for gas price fee markets

Signed-off-by: Fabio Di Fabio <fabio.difabio@consensys.net>

Author: fab-10

ethereum/eth/src/main/java/org/hyperledger/besu/ethereum/eth/transactions/layered/GasPricePrioritizedTransactions.java

@@ -82,7 +82,7 @@ protected boolean promotionFilter(final PendingTransaction pendingTransaction) {
         || pendingTransaction
             .getTransaction()
             .getGasPrice()
-            .map(getAndLogMinTransactionGasPrice()::lessThan)
+            .map(getAndLogMinTransactionGasPrice()::lessOrEqualThan)
             .orElse(false);
   }
 

ethereum/eth/src/test/java/org/hyperledger/besu/ethereum/eth/transactions/layered/AbstractPrioritizedTransactionsTestBase.java

@@ -151,6 +151,14 @@ public void txBelowCurrentMineableMinGasPriceIsNotPrioritized() {
     assertTransactionNotPrioritized(lowGasPriceTx);
   }
 
+  @Test
+  public void txWithGasPriceEqualsToMineableMinGasPriceIsPrioritized() {
+    final PendingTransaction lowGasPriceTx =
+        createRemotePendingTransaction(createTransaction(0, DEFAULT_MIN_GAS_PRICE, KEYS1));
+    assertThat(prioritizeTransaction(lowGasPriceTx)).isEqualTo(ADDED);
+    assertTransactionPrioritized(lowGasPriceTx);
+  }
+
   @Test
   public void txWithPriorityBelowCurrentMineableMinGasPriceIsPrioritized() {
     final PendingTransaction lowGasPriceTx =