[KGA-70] fix: handle_l1_message gas price set to 0 (#1584)

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## What is the current behavior?

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Resolves #<Issue number>

## What is the new behavior?

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Fees are payed on L1 in the starknet messaging contract.
Users should not pay a second time.

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cairo_zero/kakarot/constants.cairo

@@ -37,6 +37,9 @@ namespace Constants {
     // FIELD PRIME
     const FELT252_PRIME_HIGH = 0x8000000000000110000000000000000;
     const FELT252_PRIME_LOW = 0x1;
+
+    // Infinite gas handle_l1_message
+    const INFINITE_GAS = 2 ** 64 - 1;
 }
 
 // See model.Opcode:

cairo_zero/kakarot/library.cairo

@@ -395,6 +395,11 @@ namespace Kakarot {
         return l1_messaging_contract_address;
     }
 
+    // @notice Handle an L1 message
+    //         Gas is paid on L1 through the starknet messaging system hence this should not
+    //         revert due to OOG.
+    //         The gas limit is set to Constants.INFINITE_GAS.
+    //         The gas price is set to 0 so no gas is paid and no refund is given.
     func handle_l1_message{
         syscall_ptr: felt*,
         pedersen_ptr: HashBuiltin*,
@@ -410,7 +415,7 @@ namespace Kakarot {
         let (access_list) = alloc();
 
         return eth_call(
-            0, l1_sender, to, 2100000000, 1, value_u256, data_len, data, 0, access_list
+            0, l1_sender, to, Constants.INFINITE_GAS, 0, value_u256, data_len, data, 0, access_list
         );
     }