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Fix global state root when class root is empty #2

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Fix global state root when class root is empty #2

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7 changes: 4 additions & 3 deletions ...es/apollo_starknet_os_program/src/cairo/starkware/starknet/core/os/state/commitment.cairo
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Original file line number Diff line number Diff line change
Expand Up @@ -38,9 +38,10 @@ struct StateEntry {
func calculate_global_state_root{poseidon_ptr: PoseidonBuiltin*, range_check_ptr}(
contract_state_root: felt, contract_class_root: felt
) -> (global_root: felt) {
if (contract_state_root == 0 and contract_class_root == 0) {
// The state is empty.
return (global_root=0);
if (contract_class_root == 0) {
// Backward compatibility: when the class tree is empty, the global state root is the
// contract state root.
return (global_root=contract_state_root);
}

tempvar elements: felt* = new (GLOBAL_STATE_VERSION, contract_state_root, contract_class_root);
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