reduce chain id to u32::max - 1 at most

Makefile

@@ -65,7 +65,7 @@ build-sol:
 	forge build --names --force
 
 install-katana:
-	cargo install --git https://github.com/dojoengine/dojo --locked --tag v0.6.0-alpha.2 katana
+	cargo install --git https://github.com/dojoengine/dojo --locked --tag v0.6.0-alpha.6 katana
 
 run-katana:
-	katana --validate-max-steps 16777216 --invoke-max-steps 16777216 --eth-gas-price 0 --strk-gas-price 0 --disable-fee
+	katana --chain-id test --validate-max-steps 16777216 --invoke-max-steps 16777216 --eth-gas-price 0 --strk-gas-price 0 --disable-fee

src/backend/starknet.cairo

@@ -120,7 +120,7 @@ namespace Starknet {
 
         // No idea why this is required - but trying to pass prev_randao directly causes bugs.
         let prev_randao = Uint256(low=prev_randao.low, high=prev_randao.high);
-        let (_, chain_id) = unsigned_div_rem(tx_info.chain_id, 2 ** 64);
+        let (_, chain_id) = unsigned_div_rem(tx_info.chain_id, 2 ** 32);
 
         return new model.Environment(
             origin=origin,

tests/src/kakarot/instructions/test_block_information.py

@@ -48,4 +48,4 @@ def test__exec_block_information(self, cairo_run, opcode, expected_result):
     )
     def test__exec_chain_id__should_return_mod_64(self, cairo_run):
         output = cairo_run("test__exec_block_information", opcode=Opcodes.CHAINID)
-        assert output == hex(BIG_CHAIN_ID % 2**64)
+        assert output == hex(BIG_CHAIN_ID % 2**32)