1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101

use crate::*;
use crate::elrond_codec::*;
use core::marker::PhantomData;

struct ApiOutput<A, BigInt, BigUint>
where
    BigUint: BigUintApi + 'static,
    BigInt: BigIntApi<BigUint> + 'static,
    A: ContractIOApi<BigInt, BigUint> + 'static 
{
    api: A,
    _phantom1: PhantomData<BigInt>,
    _phantom2: PhantomData<BigUint>,
}

impl<A, BigInt, BigUint> ApiOutput<A, BigInt, BigUint>
where
    BigUint: BigUintApi + 'static,
    BigInt: BigIntApi<BigUint> + 'static,
    A: ContractIOApi<BigInt, BigUint> + 'static 
{
    #[inline]
    fn new(api: A) -> Self {
        ApiOutput {
            api,
            _phantom1: PhantomData,
            _phantom2: PhantomData,
        }
    }
}

impl<A, BigInt, BigUint> TopEncodeOutput for ApiOutput<A, BigInt, BigUint>
where
    BigUint: BigUintApi + 'static,
    BigInt: BigIntApi<BigUint> + 'static,
    A: ContractIOApi<BigInt, BigUint> + 'static 
{
    fn set_slice_u8(self, bytes: &[u8]) {
        self.api.finish_slice_u8(bytes);
    }

    fn set_u64(self, value: u64) {
        self.api.finish_u64(value);
    }

    fn set_i64(self, value: i64) {
        self.api.finish_i64(value);
    }

    #[inline]
    fn set_unit(self) {
        // nothing: no result produced
    }

    #[inline]
    fn set_big_int_handle_or_bytes<F: FnOnce() -> Vec<u8>>(self, handle: i32, _else_bytes: F) {
        self.api.finish_big_int_raw(handle);
    }

    #[inline]
    fn set_big_uint_handle_or_bytes<F: FnOnce() -> Vec<u8>>(self, handle: i32, _else_bytes: F) {
        self.api.finish_big_uint_raw(handle);
    }
    
}

pub trait EndpointResult<A, BigInt, BigUint>: Sized
where
    BigUint: BigUintApi + 'static,
    BigInt: BigIntApi<BigUint> + 'static,
    A: ContractHookApi<BigInt, BigUint> + ContractIOApi<BigInt, BigUint> + 'static 
{
    fn finish(&self, api: A);
}

/// All serializable objects can be used as smart contract function result.
impl<A, BigInt, BigUint, T> EndpointResult<A, BigInt, BigUint> for T
where
    T: TopEncode,
    BigUint: BigUintApi + 'static,
    BigInt: BigIntApi<BigUint> + 'static,
    A: ContractHookApi<BigInt, BigUint> + ContractIOApi<BigInt, BigUint> + 'static
{
    fn finish(&self, api: A) {
        self.top_encode_or_exit(
            ApiOutput::new(api.clone()),
            api.clone(),
            finish_exit
        );
    }
}

#[inline(always)]
fn finish_exit<A, BigInt, BigUint>(api: A, en_err: EncodeError) -> !
where
    BigUint: BigUintApi + 'static,
    BigInt: BigIntApi<BigUint> + 'static,
    A: ContractHookApi<BigInt, BigUint> + ContractIOApi<BigInt, BigUint> + 'static
{
    api.signal_error(en_err.message_bytes())
}