diff --git a/src/main/java/org/qortal/block/BlockChain.java b/src/main/java/org/qortal/block/BlockChain.java
index 218fb14d..d79203da 100644
--- a/src/main/java/org/qortal/block/BlockChain.java
+++ b/src/main/java/org/qortal/block/BlockChain.java
@@ -48,9 +48,6 @@ public class BlockChain {
 	/** Transaction expiry period, starting from transaction's timestamp, in milliseconds. */
 	private long transactionExpiryPeriod;
 
-	@XmlJavaTypeAdapter(value = org.qortal.api.AmountTypeAdapter.class)
-	private long unitFee;
-
 	private int maxBytesPerUnitFee;
 
 	/** Maximum acceptable timestamp disagreement offset in milliseconds. */
@@ -89,6 +86,7 @@ public class BlockChain {
 		@XmlJavaTypeAdapter(value = org.qortal.api.AmountTypeAdapter.class)
 		public long fee;
 	}
+	private List<UnitFeesByTimestamp> unitFees;
 	private List<UnitFeesByTimestamp> nameRegistrationUnitFees;
 
 	/** Map of which blockchain features are enabled when (height/timestamp) */
@@ -346,10 +344,6 @@ public class BlockChain {
 		return this.isTestChain;
 	}
 
-	public long getUnitFee() {
-		return this.unitFee;
-	}
-
 	public int getMaxBytesPerUnitFee() {
 		return this.maxBytesPerUnitFee;
 	}
@@ -547,13 +541,22 @@ public class BlockChain {
 		throw new IllegalStateException(String.format("No block timing info available for height %d", ourHeight));
 	}
 
+	public long getUnitFeeAtTimestamp(long ourTimestamp) {
+		for (int i = unitFees.size() - 1; i >= 0; --i)
+			if (unitFees.get(i).timestamp <= ourTimestamp)
+				return unitFees.get(i).fee;
+
+		// Shouldn't happen, but set a sensible default just in case
+		return 100000;
+	}
+
 	public long getNameRegistrationUnitFeeAtTimestamp(long ourTimestamp) {
 		for (int i = nameRegistrationUnitFees.size() - 1; i >= 0; --i)
 			if (nameRegistrationUnitFees.get(i).timestamp <= ourTimestamp)
 				return nameRegistrationUnitFees.get(i).fee;
 
-		// Default to system-wide unit fee
-		return this.getUnitFee();
+		// Shouldn't happen, but set a sensible default just in case
+		return 100000;
 	}
 
 	public int getMaxRewardSharesAtTimestamp(long ourTimestamp) {
diff --git a/src/main/java/org/qortal/transaction/Transaction.java b/src/main/java/org/qortal/transaction/Transaction.java
index a9eb6ae7..f750aff5 100644
--- a/src/main/java/org/qortal/transaction/Transaction.java
+++ b/src/main/java/org/qortal/transaction/Transaction.java
@@ -378,7 +378,7 @@ public abstract class Transaction {
 	 * @return
 	 */
 	public long getUnitFee(Long timestamp) {
-		return BlockChain.getInstance().getUnitFee();
+		return BlockChain.getInstance().getUnitFeeAtTimestamp(timestamp);
 	}
 
 	/**
diff --git a/src/main/resources/blockchain.json b/src/main/resources/blockchain.json
index c6151204..7d203004 100644
--- a/src/main/resources/blockchain.json
+++ b/src/main/resources/blockchain.json
@@ -3,8 +3,12 @@
 	"transactionExpiryPeriod": 86400000,
 	"maxBlockSize": 2097152,
 	"maxBytesPerUnitFee": 1024,
-	"unitFee": "0.001",
+	"unitFees": [
+		{ "timestamp": 0, "fee": "0.001" },
+		{ "timestamp": 9999999999999, "fee": "0.01" }
+	],
 	"nameRegistrationUnitFees": [
+		{ "timestamp": 0, "fee": "0.001" },
 		{ "timestamp": 1645372800000, "fee": "5" },
 		{ "timestamp": 1651420800000, "fee": "1.25" }
 	],
diff --git a/src/test/java/org/qortal/test/MessageTests.java b/src/test/java/org/qortal/test/MessageTests.java
index f08c7b2f..4d0ecfcc 100644
--- a/src/test/java/org/qortal/test/MessageTests.java
+++ b/src/test/java/org/qortal/test/MessageTests.java
@@ -85,7 +85,7 @@ public class MessageTests extends Common {
 		byte[] randomReference = new byte[64];
 		random.nextBytes(randomReference);
 
-		long minimumFee = BlockChain.getInstance().getUnitFee();
+		long minimumFee = BlockChain.getInstance().getUnitFeeAtTimestamp(System.currentTimeMillis());
 
 		try (final Repository repository = RepositoryManager.getRepository()) {
 			PrivateKeyAccount alice = Common.getTestAccount(repository, "alice");
diff --git a/src/test/java/org/qortal/test/common/transaction/TestTransaction.java b/src/test/java/org/qortal/test/common/transaction/TestTransaction.java
index 11fdf58e..b580ecd3 100644
--- a/src/test/java/org/qortal/test/common/transaction/TestTransaction.java
+++ b/src/test/java/org/qortal/test/common/transaction/TestTransaction.java
@@ -7,13 +7,15 @@ import org.qortal.block.BlockChain;
 import org.qortal.data.transaction.BaseTransactionData;
 import org.qortal.group.Group;
 import org.qortal.repository.DataException;
+import org.qortal.utils.NTP;
 
 public abstract class TestTransaction {
 
 	protected static final Random random = new Random();
 
 	public static BaseTransactionData generateBase(PrivateKeyAccount account, int txGroupId) throws DataException {
-		return new BaseTransactionData(System.currentTimeMillis(), txGroupId, account.getLastReference(), account.getPublicKey(), BlockChain.getInstance().getUnitFee(), null);
+		long timestamp = System.currentTimeMillis();
+		return new BaseTransactionData(timestamp, txGroupId, account.getLastReference(), account.getPublicKey(), BlockChain.getInstance().getUnitFeeAtTimestamp(timestamp), null);
 	}
 
 	public static BaseTransactionData generateBase(PrivateKeyAccount account) throws DataException {
diff --git a/src/test/java/org/qortal/test/naming/BuySellTests.java b/src/test/java/org/qortal/test/naming/BuySellTests.java
index 4530820e..f0e97b94 100644
--- a/src/test/java/org/qortal/test/naming/BuySellTests.java
+++ b/src/test/java/org/qortal/test/naming/BuySellTests.java
@@ -44,7 +44,7 @@ public class BuySellTests extends Common {
 		bob = Common.getTestAccount(repository, "bob");
 
 		name = "test name" + " " + random.nextInt(1_000_000);
-		price = random.nextInt(1000) * Amounts.MULTIPLIER;
+		price = (random.nextInt(1000) + 1) * Amounts.MULTIPLIER;
 	}
 
 	@After
diff --git a/src/test/java/org/qortal/test/naming/MiscTests.java b/src/test/java/org/qortal/test/naming/MiscTests.java
index 2bcd098d..91eb3dc9 100644
--- a/src/test/java/org/qortal/test/naming/MiscTests.java
+++ b/src/test/java/org/qortal/test/naming/MiscTests.java
@@ -20,6 +20,7 @@ import org.qortal.repository.Repository;
 import org.qortal.repository.RepositoryManager;
 import org.qortal.test.common.*;
 import org.qortal.test.common.transaction.TestTransaction;
+import org.qortal.transaction.PaymentTransaction;
 import org.qortal.transaction.RegisterNameTransaction;
 import org.qortal.transaction.Transaction;
 import org.qortal.transaction.Transaction.ValidationResult;
@@ -329,15 +330,19 @@ public class MiscTests extends Common {
 	public void testRegisterNameFeeIncrease() throws Exception {
 		try (final Repository repository = RepositoryManager.getRepository()) {
 
-			// Set nameRegistrationUnitFeeTimestamp to a time far in the future
+			// Add original fee to nameRegistrationUnitFees
+			UnitFeesByTimestamp originalFee = new UnitFeesByTimestamp();
+			originalFee.timestamp = 0L;
+			originalFee.fee = new AmountTypeAdapter().unmarshal("0.1");
+
+			// Add a time far in the future to nameRegistrationUnitFees
 			UnitFeesByTimestamp futureFeeIncrease = new UnitFeesByTimestamp();
 			futureFeeIncrease.timestamp = 9999999999999L; // 20 Nov 2286
 			futureFeeIncrease.fee = new AmountTypeAdapter().unmarshal("5");
-			FieldUtils.writeField(BlockChain.getInstance(), "nameRegistrationUnitFees", Arrays.asList(futureFeeIncrease), true);
+			FieldUtils.writeField(BlockChain.getInstance(), "nameRegistrationUnitFees", Arrays.asList(originalFee, futureFeeIncrease), true);
 			assertEquals(futureFeeIncrease.fee, BlockChain.getInstance().getNameRegistrationUnitFeeAtTimestamp(futureFeeIncrease.timestamp));
 
 			// Validate unit fees pre and post timestamp
-			assertEquals(10000000, BlockChain.getInstance().getUnitFee()); // 0.1 QORT
 			assertEquals(10000000, BlockChain.getInstance().getNameRegistrationUnitFeeAtTimestamp(futureFeeIncrease.timestamp - 1)); // 0.1 QORT
 			assertEquals(500000000, BlockChain.getInstance().getNameRegistrationUnitFeeAtTimestamp(futureFeeIncrease.timestamp)); // 5 QORT
 
@@ -362,7 +367,7 @@ public class MiscTests extends Common {
 			futureFeeIncrease.timestamp = now + (60 * 60 * 1000L); // 1 hour in the future
 			futureFeeIncrease.fee = new AmountTypeAdapter().unmarshal("10");
 
-			FieldUtils.writeField(BlockChain.getInstance(), "nameRegistrationUnitFees", Arrays.asList(pastFeeIncrease, futureFeeIncrease), true);
+			FieldUtils.writeField(BlockChain.getInstance(), "nameRegistrationUnitFees", Arrays.asList(originalFee, pastFeeIncrease, futureFeeIncrease), true);
 			assertEquals(pastFeeIncrease.fee, BlockChain.getInstance().getNameRegistrationUnitFeeAtTimestamp(pastFeeIncrease.timestamp));
 			assertEquals(futureFeeIncrease.fee, BlockChain.getInstance().getNameRegistrationUnitFeeAtTimestamp(futureFeeIncrease.timestamp));
 
@@ -387,4 +392,123 @@ public class MiscTests extends Common {
 		}
 	}
 
+	// test reading the name registration fee schedule from blockchain.json / test-chain-v2.json
+	@Test
+	public void testRegisterNameFeeScheduleInTestchainData() throws Exception {
+		try (final Repository repository = RepositoryManager.getRepository()) {
+
+			final long expectedFutureFeeIncreaseTimestamp = 9999999999999L; // 20 Nov 2286, as per test-chain-v2.json
+			final long expectedFutureFeeIncreaseValue = new AmountTypeAdapter().unmarshal("5");
+
+			assertEquals(expectedFutureFeeIncreaseValue, BlockChain.getInstance().getNameRegistrationUnitFeeAtTimestamp(expectedFutureFeeIncreaseTimestamp));
+
+			// Validate unit fees pre and post timestamp
+			assertEquals(10000000, BlockChain.getInstance().getNameRegistrationUnitFeeAtTimestamp(expectedFutureFeeIncreaseTimestamp - 1)); // 0.1 QORT
+			assertEquals(500000000, BlockChain.getInstance().getNameRegistrationUnitFeeAtTimestamp(expectedFutureFeeIncreaseTimestamp)); // 5 QORT
+
+			// Register-name
+			PrivateKeyAccount alice = Common.getTestAccount(repository, "alice");
+			String name = "test-name";
+			String data = "{\"age\":30}";
+
+			RegisterNameTransactionData transactionData = new RegisterNameTransactionData(TestTransaction.generateBase(alice), name, data);
+			transactionData.setFee(new RegisterNameTransaction(null, null).getUnitFee(transactionData.getTimestamp()));
+			assertEquals(10000000L, transactionData.getFee().longValue());
+			TransactionUtils.signAndMint(repository, transactionData, alice);
+		}
+	}
+
+
+
+	// test general unit fee increase
+	@Test
+	public void testUnitFeeIncrease() throws Exception {
+		try (final Repository repository = RepositoryManager.getRepository()) {
+
+			// Add original fee to unitFees
+			UnitFeesByTimestamp originalFee = new UnitFeesByTimestamp();
+			originalFee.timestamp = 0L;
+			originalFee.fee = new AmountTypeAdapter().unmarshal("0.1");
+
+			// Add a time far in the future to unitFees
+			UnitFeesByTimestamp futureFeeIncrease = new UnitFeesByTimestamp();
+			futureFeeIncrease.timestamp = 9999999999999L; // 20 Nov 2286
+			futureFeeIncrease.fee = new AmountTypeAdapter().unmarshal("1");
+			FieldUtils.writeField(BlockChain.getInstance(), "unitFees", Arrays.asList(originalFee, futureFeeIncrease), true);
+			assertEquals(futureFeeIncrease.fee, BlockChain.getInstance().getUnitFeeAtTimestamp(futureFeeIncrease.timestamp));
+
+			// Validate unit fees pre and post timestamp
+			assertEquals(10000000, BlockChain.getInstance().getUnitFeeAtTimestamp(futureFeeIncrease.timestamp - 1)); // 0.1 QORT
+			assertEquals(100000000, BlockChain.getInstance().getUnitFeeAtTimestamp(futureFeeIncrease.timestamp)); // 1 QORT
+
+			// Payment
+			PrivateKeyAccount alice = Common.getTestAccount(repository, "alice");
+			PrivateKeyAccount bob = Common.getTestAccount(repository, "bob");
+
+			PaymentTransactionData transactionData = new PaymentTransactionData(TestTransaction.generateBase(alice), bob.getAddress(), 100000);
+			transactionData.setFee(new PaymentTransaction(null, null).getUnitFee(transactionData.getTimestamp()));
+			assertEquals(10000000L, transactionData.getFee().longValue());
+			TransactionUtils.signAndMint(repository, transactionData, alice);
+
+			// Set fee increase to a time in the past
+			Long now = NTP.getTime();
+			UnitFeesByTimestamp pastFeeIncrease = new UnitFeesByTimestamp();
+			pastFeeIncrease.timestamp = now - 1000L; // 1 second ago
+			pastFeeIncrease.fee = new AmountTypeAdapter().unmarshal("3");
+
+			// Set another increase in the future
+			futureFeeIncrease = new UnitFeesByTimestamp();
+			futureFeeIncrease.timestamp = now + (60 * 60 * 1000L); // 1 hour in the future
+			futureFeeIncrease.fee = new AmountTypeAdapter().unmarshal("10");
+
+			FieldUtils.writeField(BlockChain.getInstance(), "unitFees", Arrays.asList(originalFee, pastFeeIncrease, futureFeeIncrease), true);
+			assertEquals(originalFee.fee, BlockChain.getInstance().getUnitFeeAtTimestamp(originalFee.timestamp));
+			assertEquals(pastFeeIncrease.fee, BlockChain.getInstance().getUnitFeeAtTimestamp(pastFeeIncrease.timestamp));
+			assertEquals(futureFeeIncrease.fee, BlockChain.getInstance().getUnitFeeAtTimestamp(futureFeeIncrease.timestamp));
+
+			// Send another payment transaction
+			// Fee should be determined automatically
+			transactionData = new PaymentTransactionData(TestTransaction.generateBase(alice), bob.getAddress(), 50000);
+			assertEquals(300000000L, transactionData.getFee().longValue());
+			Transaction transaction = Transaction.fromData(repository, transactionData);
+			transaction.sign(alice);
+			ValidationResult result = transaction.importAsUnconfirmed();
+			assertTrue("Transaction should be valid", ValidationResult.OK == result);
+
+			// Now try fetching and setting fee manually
+			transactionData = new PaymentTransactionData(TestTransaction.generateBase(alice), bob.getAddress(), 50000);
+			transactionData.setFee(new PaymentTransaction(null, null).getUnitFee(transactionData.getTimestamp()));
+			assertEquals(300000000L, transactionData.getFee().longValue());
+			transaction = Transaction.fromData(repository, transactionData);
+			transaction.sign(alice);
+			result = transaction.importAsUnconfirmed();
+			assertTrue("Transaction should be valid", ValidationResult.OK == result);
+		}
+	}
+
+	// test reading the fee schedule from blockchain.json / test-chain-v2.json
+	@Test
+	public void testFeeScheduleInTestchainData() throws Exception {
+		try (final Repository repository = RepositoryManager.getRepository()) {
+
+			final long expectedFutureFeeIncreaseTimestamp = 9999999999999L; // 20 Nov 2286, as per test-chain-v2.json
+			final long expectedFutureFeeIncreaseValue = new AmountTypeAdapter().unmarshal("1");
+
+			assertEquals(expectedFutureFeeIncreaseValue, BlockChain.getInstance().getUnitFeeAtTimestamp(expectedFutureFeeIncreaseTimestamp));
+
+			// Validate unit fees pre and post timestamp
+			assertEquals(10000000, BlockChain.getInstance().getUnitFeeAtTimestamp(expectedFutureFeeIncreaseTimestamp - 1)); // 0.1 QORT
+			assertEquals(100000000, BlockChain.getInstance().getUnitFeeAtTimestamp(expectedFutureFeeIncreaseTimestamp)); // 1 QORT
+
+			// Payment
+			PrivateKeyAccount alice = Common.getTestAccount(repository, "alice");
+			PrivateKeyAccount bob = Common.getTestAccount(repository, "bob");
+
+			PaymentTransactionData transactionData = new PaymentTransactionData(TestTransaction.generateBase(alice), bob.getAddress(), 100000);
+			transactionData.setFee(new PaymentTransaction(null, null).getUnitFee(transactionData.getTimestamp()));
+			assertEquals(10000000L, transactionData.getFee().longValue());
+			TransactionUtils.signAndMint(repository, transactionData, alice);
+		}
+	}
+
 }
diff --git a/src/test/resources/test-chain-v2-block-timestamps.json b/src/test/resources/test-chain-v2-block-timestamps.json
index 3b4de702..25915e9a 100644
--- a/src/test/resources/test-chain-v2-block-timestamps.json
+++ b/src/test/resources/test-chain-v2-block-timestamps.json
@@ -4,8 +4,11 @@
 	"transactionExpiryPeriod": 86400000,
 	"maxBlockSize": 2097152,
 	"maxBytesPerUnitFee": 1024,
-	"unitFee": "0.1",
+	"unitFees": [
+		{ "timestamp": 0, "fee": "0.1" }
+	],
 	"nameRegistrationUnitFees": [
+		{ "timestamp": 0, "fee": "0.1" },
 		{ "timestamp": 1645372800000, "fee": "5" }
 	],
 	"requireGroupForApproval": false,
diff --git a/src/test/resources/test-chain-v2-disable-reference.json b/src/test/resources/test-chain-v2-disable-reference.json
index c93fbb78..ae499491 100644
--- a/src/test/resources/test-chain-v2-disable-reference.json
+++ b/src/test/resources/test-chain-v2-disable-reference.json
@@ -4,8 +4,11 @@
 	"transactionExpiryPeriod": 86400000,
 	"maxBlockSize": 2097152,
 	"maxBytesPerUnitFee": 1024,
-	"unitFee": "0.1",
+	"unitFees": [
+		{ "timestamp": 0, "fee": "0.1" }
+	],
 	"nameRegistrationUnitFees": [
+		{ "timestamp": 0, "fee": "0.1" },
 		{ "timestamp": 1645372800000, "fee": "5" }
 	],
 	"requireGroupForApproval": false,
diff --git a/src/test/resources/test-chain-v2-founder-rewards.json b/src/test/resources/test-chain-v2-founder-rewards.json
index 1b068932..e6b327b1 100644
--- a/src/test/resources/test-chain-v2-founder-rewards.json
+++ b/src/test/resources/test-chain-v2-founder-rewards.json
@@ -4,8 +4,11 @@
 	"transactionExpiryPeriod": 86400000,
 	"maxBlockSize": 2097152,
 	"maxBytesPerUnitFee": 1024,
-	"unitFee": "0.1",
+	"unitFees": [
+		{ "timestamp": 0, "fee": "0.1" }
+	],
 	"nameRegistrationUnitFees": [
+		{ "timestamp": 0, "fee": "0.1" },
 		{ "timestamp": 1645372800000, "fee": "5" }
 	],
 	"requireGroupForApproval": false,
diff --git a/src/test/resources/test-chain-v2-leftover-reward.json b/src/test/resources/test-chain-v2-leftover-reward.json
index aef76cc2..9fda9b1f 100644
--- a/src/test/resources/test-chain-v2-leftover-reward.json
+++ b/src/test/resources/test-chain-v2-leftover-reward.json
@@ -4,8 +4,11 @@
 	"transactionExpiryPeriod": 86400000,
 	"maxBlockSize": 2097152,
 	"maxBytesPerUnitFee": 1024,
-	"unitFee": "0.1",
+	"unitFees": [
+		{ "timestamp": 0, "fee": "0.1" }
+	],
 	"nameRegistrationUnitFees": [
+		{ "timestamp": 0, "fee": "0.1" },
 		{ "timestamp": 1645372800000, "fee": "5" }
 	],
 	"requireGroupForApproval": false,
diff --git a/src/test/resources/test-chain-v2-minting.json b/src/test/resources/test-chain-v2-minting.json
index db6d8a0b..4ff3ec3c 100644
--- a/src/test/resources/test-chain-v2-minting.json
+++ b/src/test/resources/test-chain-v2-minting.json
@@ -4,8 +4,11 @@
 	"transactionExpiryPeriod": 86400000,
 	"maxBlockSize": 2097152,
 	"maxBytesPerUnitFee": 1024,
-	"unitFee": "0.1",
+	"unitFees": [
+		{ "timestamp": 0, "fee": "0.1" }
+	],
 	"nameRegistrationUnitFees": [
+		{ "timestamp": 0, "fee": "0.1" },
 		{ "timestamp": 1645372800000, "fee": "5" }
 	],
 	"requireGroupForApproval": false,
diff --git a/src/test/resources/test-chain-v2-qora-holder-extremes.json b/src/test/resources/test-chain-v2-qora-holder-extremes.json
index 2452d4d2..306fd9a3 100644
--- a/src/test/resources/test-chain-v2-qora-holder-extremes.json
+++ b/src/test/resources/test-chain-v2-qora-holder-extremes.json
@@ -4,8 +4,11 @@
 	"transactionExpiryPeriod": 86400000,
 	"maxBlockSize": 2097152,
 	"maxBytesPerUnitFee": 1024,
-	"unitFee": "0.1",
+	"unitFees": [
+		{ "timestamp": 0, "fee": "0.1" }
+	],
 	"nameRegistrationUnitFees": [
+		{ "timestamp": 0, "fee": "0.1" },
 		{ "timestamp": 1645372800000, "fee": "5" }
 	],
 	"requireGroupForApproval": false,
diff --git a/src/test/resources/test-chain-v2-qora-holder-reduction.json b/src/test/resources/test-chain-v2-qora-holder-reduction.json
index 23193729..6128baa7 100644
--- a/src/test/resources/test-chain-v2-qora-holder-reduction.json
+++ b/src/test/resources/test-chain-v2-qora-holder-reduction.json
@@ -4,8 +4,11 @@
 	"transactionExpiryPeriod": 86400000,
 	"maxBlockSize": 2097152,
 	"maxBytesPerUnitFee": 1024,
-	"unitFee": "0.1",
+	"unitFees": [
+		{ "timestamp": 0, "fee": "0.1" }
+	],
 	"nameRegistrationUnitFees": [
+		{ "timestamp": 0, "fee": "0.1" },
 		{ "timestamp": 1645372800000, "fee": "5" }
 	],
 	"requireGroupForApproval": false,
diff --git a/src/test/resources/test-chain-v2-qora-holder.json b/src/test/resources/test-chain-v2-qora-holder.json
index 9d81632b..9b6bccda 100644
--- a/src/test/resources/test-chain-v2-qora-holder.json
+++ b/src/test/resources/test-chain-v2-qora-holder.json
@@ -4,8 +4,11 @@
 	"transactionExpiryPeriod": 86400000,
 	"maxBlockSize": 2097152,
 	"maxBytesPerUnitFee": 1024,
-	"unitFee": "0.1",
+	"unitFees": [
+		{ "timestamp": 0, "fee": "0.1" }
+	],
 	"nameRegistrationUnitFees": [
+		{ "timestamp": 0, "fee": "0.1" },
 		{ "timestamp": 1645372800000, "fee": "5" }
 	],
 	"requireGroupForApproval": false,
diff --git a/src/test/resources/test-chain-v2-reward-levels.json b/src/test/resources/test-chain-v2-reward-levels.json
index 81609595..1ffa8baf 100644
--- a/src/test/resources/test-chain-v2-reward-levels.json
+++ b/src/test/resources/test-chain-v2-reward-levels.json
@@ -4,8 +4,11 @@
 	"transactionExpiryPeriod": 86400000,
 	"maxBlockSize": 2097152,
 	"maxBytesPerUnitFee": 1024,
-	"unitFee": "0.1",
+	"unitFees": [
+		{ "timestamp": 0, "fee": "0.1" }
+	],
 	"nameRegistrationUnitFees": [
+		{ "timestamp": 0, "fee": "0.1" },
 		{ "timestamp": 1645372800000, "fee": "5" }
 	],
 	"requireGroupForApproval": false,
diff --git a/src/test/resources/test-chain-v2-reward-scaling.json b/src/test/resources/test-chain-v2-reward-scaling.json
index 21a5b7a7..6c3b3276 100644
--- a/src/test/resources/test-chain-v2-reward-scaling.json
+++ b/src/test/resources/test-chain-v2-reward-scaling.json
@@ -4,8 +4,11 @@
 	"transactionExpiryPeriod": 86400000,
 	"maxBlockSize": 2097152,
 	"maxBytesPerUnitFee": 1024,
-	"unitFee": "0.1",
+	"unitFees": [
+		{ "timestamp": 0, "fee": "0.1" }
+	],
 	"nameRegistrationUnitFees": [
+		{ "timestamp": 0, "fee": "0.1" },
 		{ "timestamp": 1645372800000, "fee": "5" }
 	],
 	"requireGroupForApproval": false,
diff --git a/src/test/resources/test-chain-v2-reward-shares.json b/src/test/resources/test-chain-v2-reward-shares.json
index 6119ac48..09627e1f 100644
--- a/src/test/resources/test-chain-v2-reward-shares.json
+++ b/src/test/resources/test-chain-v2-reward-shares.json
@@ -4,8 +4,11 @@
 	"transactionExpiryPeriod": 86400000,
 	"maxBlockSize": 2097152,
 	"maxBytesPerUnitFee": 1024,
-	"unitFee": "0.1",
+	"unitFees": [
+		{ "timestamp": 0, "fee": "0.1" }
+	],
 	"nameRegistrationUnitFees": [
+		{ "timestamp": 0, "fee": "0.1" },
 		{ "timestamp": 1645372800000, "fee": "5" }
 	],
 	"requireGroupForApproval": false,
diff --git a/src/test/resources/test-chain-v2-self-sponsorship-algo.json b/src/test/resources/test-chain-v2-self-sponsorship-algo.json
index dc5f3961..81cda1e8 100644
--- a/src/test/resources/test-chain-v2-self-sponsorship-algo.json
+++ b/src/test/resources/test-chain-v2-self-sponsorship-algo.json
@@ -4,8 +4,11 @@
 	"transactionExpiryPeriod": 86400000,
 	"maxBlockSize": 2097152,
 	"maxBytesPerUnitFee": 0,
-	"unitFee": "0.00000001",
+	"unitFees": [
+		{ "timestamp": 0, "fee": "0.00000001" }
+	],
 	"nameRegistrationUnitFees": [
+		{ "timestamp": 0, "fee": "0.00000001" },
 		{ "timestamp": 1645372800000, "fee": "5" }
 	],
 	"requireGroupForApproval": false,
diff --git a/src/test/resources/test-chain-v2.json b/src/test/resources/test-chain-v2.json
index d0c460df..2e96e911 100644
--- a/src/test/resources/test-chain-v2.json
+++ b/src/test/resources/test-chain-v2.json
@@ -4,9 +4,13 @@
 	"transactionExpiryPeriod": 86400000,
 	"maxBlockSize": 2097152,
 	"maxBytesPerUnitFee": 1024,
-	"unitFee": "0.1",
+	"unitFees": [
+		{ "timestamp": 0, "fee": "0.1" },
+		{ "timestamp": 9999999999999, "fee": "1" }
+	],
 	"nameRegistrationUnitFees": [
-		{ "timestamp": 1645372800000, "fee": "5" }
+		{ "timestamp": 0, "fee": "0.1" },
+		{ "timestamp": 9999999999999, "fee": "5" }
 	],
 	"requireGroupForApproval": false,
 	"minAccountLevelToRewardShare": 5,