neo_solidity/runtime/bridge/
bridge_helpers.rs

1fn extract_bytes(item: &StackItem) -> Result<Vec<u8>, VMBridgeError> {
2    Ok(match item {
3        StackItem::ByteArray(bytes) => bytes.borrow().clone(),
4        StackItem::UnsignedInteger(value) => value.to_be_bytes().to_vec(),
5        StackItem::Integer(value) => {
6            if *value < 0 {
7                return Err(VMBridgeError::StackOperationFailed {
8                    message: "Negative integers not supported for byte extraction".to_string(),
9                });
10            }
11            (*value as u64).to_be_bytes().to_vec()
12        }
13        StackItem::Array(_) => {
14            return Err(VMBridgeError::StackOperationFailed {
15                message: "Cannot extract bytes from array stack item".to_string(),
16            })
17        }
18        StackItem::Map(_) => {
19            return Err(VMBridgeError::StackOperationFailed {
20                message: "Cannot extract bytes from map".to_string(),
21            })
22        }
23        StackItem::Boolean(flag) => vec![if *flag { 1 } else { 0 }],
24        StackItem::Null => Vec::new(),
25    })
26}
27
28fn extract_integer(item: &StackItem) -> Result<u128, VMBridgeError> {
29    Ok(match item {
30        StackItem::UnsignedInteger(value) => *value as u128,
31        StackItem::Integer(value) => {
32            if *value < 0 {
33                return Err(VMBridgeError::StackOperationFailed {
34                    message: "Negative integers not supported here".to_string(),
35                });
36            }
37            *value as u128
38        }
39        StackItem::ByteArray(bytes) => {
40            let bytes = bytes.borrow();
41            if bytes.is_empty() {
42                0
43            } else {
44                let mut padded = [0u8; 16];
45                let copy_len = bytes.len().min(16);
46                padded[16 - copy_len..].copy_from_slice(&bytes[bytes.len() - copy_len..]);
47                u128::from_be_bytes(padded)
48            }
49        }
50        StackItem::Array(_) => {
51            return Err(VMBridgeError::StackOperationFailed {
52                message: "Arrays not supported for integer extraction".to_string(),
53            });
54        }
55        StackItem::Map(_) => {
56            return Err(VMBridgeError::StackOperationFailed {
57                message: "Maps not supported for integer extraction".to_string(),
58            });
59        }
60        StackItem::Boolean(flag) => {
61            if *flag {
62                1
63            } else {
64                0
65            }
66        }
67        StackItem::Null => 0,
68    })
69}
neo_solidity/runtime/bridge/bridge_helpers.rs

neo_solidity/runtime/bridge/
bridge_helpers.rs
