multiversx_chain_vm/host/vm_hooks/vh_handler/
vh_endpoint_finish.rs

1use multiversx_chain_vm_executor::VMHooksEarlyExit;
2use num_bigint::{BigInt, BigUint};
3
4use crate::{host::vm_hooks::VMHooksContext, types::RawHandle};
5
6use super::VMHooksHandler;
7
8/// Interface to only be used by code generated by the macros.
9/// The smart contract code doesn't have access to these methods directly.
10impl<C: VMHooksContext> VMHooksHandler<C> {
11    pub fn finish_slice_u8(&mut self, slice: &[u8]) -> Result<(), VMHooksEarlyExit> {
12        let mut v = vec![0u8; slice.len()];
13        v.copy_from_slice(slice);
14        let mut tx_result = self.context.result_lock();
15        tx_result.result_values.push(v);
16
17        Ok(())
18    }
19
20    pub fn finish_big_int_raw(&mut self, handle: RawHandle) -> Result<(), VMHooksEarlyExit> {
21        let bi_bytes = self.bi_get_signed_bytes(handle)?;
22        let mut tx_result = self.context.result_lock();
23
24        tx_result.result_values.push(bi_bytes);
25
26        Ok(())
27    }
28
29    pub fn finish_big_uint_raw(&mut self, handle: RawHandle) -> Result<(), VMHooksEarlyExit> {
30        let bu_bytes = self.bi_get_unsigned_bytes(handle)?;
31        let mut tx_result = self.context.result_lock();
32        tx_result.result_values.push(bu_bytes);
33
34        Ok(())
35    }
36
37    pub fn finish_managed_buffer_raw(&mut self, handle: RawHandle) -> Result<(), VMHooksEarlyExit> {
38        self.use_gas(
39            self.gas_schedule()
40                .managed_buffer_api_cost
41                .m_buffer_get_bytes,
42        )?;
43
44        let bytes = self.context.m_types_lock().mb_get_owned(handle);
45        self.finish_slice_u8(&bytes)
46    }
47
48    pub fn finish_i64(&mut self, value: i64) -> Result<(), VMHooksEarlyExit> {
49        if value == 0 {
50            self.finish_slice_u8(&[])
51        } else {
52            self.finish_slice_u8(BigInt::from(value).to_signed_bytes_be().as_slice())
53        }
54    }
55
56    pub fn finish_u64(&mut self, value: u64) -> Result<(), VMHooksEarlyExit> {
57        if value == 0 {
58            self.finish_slice_u8(&[])
59        } else {
60            self.finish_slice_u8(BigUint::from(value).to_bytes_be().as_slice())
61        }
62    }
63}
multiversx_chain_vm/host/vm_hooks/vh_handler/vh_endpoint_finish.rs

multiversx_chain_vm/host/vm_hooks/vh_handler/
vh_endpoint_finish.rs
