fix BELC3

Signed-off-by: Naohiro Yoshida <naohiro.yoshida@datachain.jp>

Author: Naohiro Yoshida

light-client/src/errors.rs

@@ -141,6 +141,7 @@ pub enum Error {
     UnexpectedMissingForkSpecInCurrentEpochCalculation(BlockNumber, alloc::boxed::Box<Error>),
     UnexpectedMissingForkSpecInPreviousEpochCalculation(BlockNumber, alloc::boxed::Box<Error>),
     UnexpectedPreviousEpochInCalculatingNextEpoch(BlockNumber, BlockNumber, BlockNumber),
+    EmptyPreviousForkSpecs,
 
     // Misbehaviour
     MissingHeader1,
@@ -506,6 +507,9 @@ impl core::fmt::Display for Error {
             Error::UnexpectedEpochInfo(e1, e2) => {
                 write!(f, "UnexpectedEpochInfo : {} {}", e1, e2)
             }
+            Error::EmptyPreviousForkSpecs => {
+                write!(f, "EmptyPreviousForkSpecs")
+            }
         }
     }
 }

light-client/src/fixture/mod.rs

@@ -89,9 +89,27 @@ pub fn fork_spec_after_lorentz() -> ForkSpec {
 
 pub fn fork_spec_after_maxwell() -> ForkSpec {
     ForkSpec {
-        height_or_timestamp: HeightOrTimestamp::Height(2),
+        height_or_timestamp: HeightOrTimestamp::Height(1),
+        additional_header_item_count: 1,
+        epoch_length: 1000,
+        max_turn_length: 64,
+    }
+}
+
+pub fn fork_spec_after_post_maxwell_1() -> ForkSpec {
+    ForkSpec {
+        height_or_timestamp: HeightOrTimestamp::Height(1),
         additional_header_item_count: 1,
         epoch_length: 1000,
         max_turn_length: 64,
     }
 }
+
+pub fn fork_spec_after_post_maxwell_2() -> ForkSpec {
+    ForkSpec {
+        height_or_timestamp: HeightOrTimestamp::Height(1),
+        additional_header_item_count: 1,
+        epoch_length: 2000,
+        max_turn_length: 64,
+    }
+}