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#[rustfmt::skip]
use alloc::vec;
use alloc::{collections::BTreeMap, string::String, vec::Vec};
use core::mem::MaybeUninit;
use casperlabs_types::{
account::PublicKey,
api_error,
bytesrepr::{self, FromBytes},
ApiError, BlockTime, CLTyped, CLValue, ContractRef, Key, Phase, URef,
BLOCKTIME_SERIALIZED_LENGTH, PHASE_SERIALIZED_LENGTH,
};
use crate::{args_parser::ArgsParser, contract_api, ext_ffi, unwrap_or_revert::UnwrapOrRevert};
pub fn ret(value: CLValue) -> ! {
let (ptr, size, _bytes) = contract_api::to_ptr(value);
unsafe {
ext_ffi::ret(ptr, size);
}
}
pub fn revert<T: Into<ApiError>>(error: T) -> ! {
unsafe {
ext_ffi::revert(error.into().into());
}
}
#[allow(clippy::ptr_arg)]
pub fn call_contract<A: ArgsParser, T: CLTyped + FromBytes>(c_ptr: ContractRef, args: A) -> T {
let contract_key: Key = c_ptr.into();
let (key_ptr, key_size, _bytes1) = contract_api::to_ptr(contract_key);
let (args_ptr, args_size, _bytes2) = ArgsParser::parse(args)
.map(contract_api::to_ptr)
.unwrap_or_revert();
let bytes_written = {
let mut bytes_written = MaybeUninit::uninit();
let ret = unsafe {
ext_ffi::call_contract(
key_ptr,
key_size,
args_ptr,
args_size,
bytes_written.as_mut_ptr(),
)
};
api_error::result_from(ret).unwrap_or_revert();
unsafe { bytes_written.assume_init() }
};
let serialized_result = if bytes_written == 0 {
vec![]
} else {
let bytes_ptr = contract_api::alloc_bytes(bytes_written);
let mut dest: Vec<u8> =
unsafe { Vec::from_raw_parts(bytes_ptr, bytes_written, bytes_written) };
read_host_buffer_into(&mut dest).unwrap_or_revert();
dest
};
bytesrepr::deserialize(serialized_result).unwrap_or_revert()
}
pub fn upgrade_contract_at_uref(name: &str, uref: URef) {
let (name_ptr, name_size, _bytes) = contract_api::to_ptr(name);
let key: Key = uref.into();
let (key_ptr, key_size, _bytes) = contract_api::to_ptr(key);
let result_value =
unsafe { ext_ffi::upgrade_contract_at_uref(name_ptr, name_size, key_ptr, key_size) };
match api_error::result_from(result_value) {
Ok(()) => (),
Err(error) => revert(error),
}
}
fn get_arg_size(i: u32) -> Option<usize> {
let mut arg_size: usize = 0;
let ret = unsafe { ext_ffi::get_arg_size(i as usize, &mut arg_size as *mut usize) };
match api_error::result_from(ret) {
Ok(_) => Some(arg_size),
Err(ApiError::MissingArgument) => None,
Err(e) => revert(e),
}
}
pub fn get_arg<T: FromBytes>(i: u32) -> Option<Result<T, bytesrepr::Error>> {
let arg_size = get_arg_size(i)?;
let arg_bytes = {
let res = {
let data_ptr = contract_api::alloc_bytes(arg_size);
let ret = unsafe { ext_ffi::get_arg(i as usize, data_ptr, arg_size) };
let data = unsafe { Vec::from_raw_parts(data_ptr, arg_size, arg_size) };
api_error::result_from(ret).map(|_| data)
};
res.unwrap_or_revert()
};
Some(bytesrepr::deserialize(arg_bytes))
}
pub fn get_caller() -> PublicKey {
let output_size = {
let mut output_size = MaybeUninit::uninit();
let ret = unsafe { ext_ffi::get_caller(output_size.as_mut_ptr()) };
api_error::result_from(ret).unwrap_or_revert();
unsafe { output_size.assume_init() }
};
let buf = read_host_buffer(output_size).unwrap_or_revert();
bytesrepr::deserialize(buf).unwrap_or_revert()
}
pub fn get_blocktime() -> BlockTime {
let dest_ptr = contract_api::alloc_bytes(BLOCKTIME_SERIALIZED_LENGTH);
let bytes = unsafe {
ext_ffi::get_blocktime(dest_ptr);
Vec::from_raw_parts(
dest_ptr,
BLOCKTIME_SERIALIZED_LENGTH,
BLOCKTIME_SERIALIZED_LENGTH,
)
};
bytesrepr::deserialize(bytes).unwrap_or_revert()
}
pub fn get_phase() -> Phase {
let dest_ptr = contract_api::alloc_bytes(PHASE_SERIALIZED_LENGTH);
unsafe { ext_ffi::get_phase(dest_ptr) };
let bytes =
unsafe { Vec::from_raw_parts(dest_ptr, PHASE_SERIALIZED_LENGTH, PHASE_SERIALIZED_LENGTH) };
bytesrepr::deserialize(bytes).unwrap_or_revert()
}
pub fn get_key(name: &str) -> Option<Key> {
let (name_ptr, name_size, _bytes) = contract_api::to_ptr(name);
let mut key_bytes = vec![0u8; Key::max_serialized_length()];
let mut total_bytes: usize = 0;
let ret = unsafe {
ext_ffi::get_key(
name_ptr,
name_size,
key_bytes.as_mut_ptr(),
key_bytes.len(),
&mut total_bytes as *mut usize,
)
};
match api_error::result_from(ret) {
Ok(_) => {}
Err(ApiError::MissingKey) => return None,
Err(e) => revert(e),
}
key_bytes.truncate(total_bytes);
let key: Key = bytesrepr::deserialize(key_bytes).unwrap_or_revert();
Some(key)
}
pub fn has_key(name: &str) -> bool {
let (name_ptr, name_size, _bytes) = contract_api::to_ptr(name);
let result = unsafe { ext_ffi::has_key(name_ptr, name_size) };
result == 0
}
pub fn put_key(name: &str, key: Key) {
let (name_ptr, name_size, _bytes) = contract_api::to_ptr(name);
let (key_ptr, key_size, _bytes2) = contract_api::to_ptr(key);
unsafe { ext_ffi::put_key(name_ptr, name_size, key_ptr, key_size) };
}
pub fn remove_key(name: &str) {
let (name_ptr, name_size, _bytes) = contract_api::to_ptr(name);
unsafe { ext_ffi::remove_key(name_ptr, name_size) }
}
pub fn list_named_keys() -> BTreeMap<String, Key> {
let (total_keys, result_size) = {
let mut total_keys = MaybeUninit::uninit();
let mut result_size = 0;
let ret = unsafe {
ext_ffi::load_named_keys(total_keys.as_mut_ptr(), &mut result_size as *mut usize)
};
api_error::result_from(ret).unwrap_or_revert();
let total_keys = unsafe { total_keys.assume_init() };
(total_keys, result_size)
};
if total_keys == 0 {
return BTreeMap::new();
}
let bytes = read_host_buffer(result_size).unwrap_or_revert();
bytesrepr::deserialize(bytes).unwrap_or_revert()
}
pub fn is_valid_uref(uref: URef) -> bool {
let (uref_ptr, uref_size, _bytes) = contract_api::to_ptr(uref);
let result = unsafe { ext_ffi::is_valid_uref(uref_ptr, uref_size) };
result != 0
}
fn read_host_buffer_into(dest: &mut [u8]) -> Result<usize, ApiError> {
let mut bytes_written = MaybeUninit::uninit();
let ret = unsafe {
ext_ffi::read_host_buffer(dest.as_mut_ptr(), dest.len(), bytes_written.as_mut_ptr())
};
api_error::result_from(ret)?;
Ok(unsafe { bytes_written.assume_init() })
}
pub(crate) fn read_host_buffer(size: usize) -> Result<Vec<u8>, ApiError> {
let bytes_ptr = contract_api::alloc_bytes(size);
let mut dest: Vec<u8> = unsafe { Vec::from_raw_parts(bytes_ptr, size, size) };
read_host_buffer_into(&mut dest)?;
Ok(dest)
}