numbat_wasm/io/
finish.rs

1use crate::api::{EndpointFinishApi, ErrorApi};
2use crate::numbat_codec::{EncodeError, TopEncode, TopEncodeOutput};
3use crate::Vec;
4
5struct ApiOutputAdapter<FA>
6where
7	FA: EndpointFinishApi + Clone + 'static,
8{
9	api: FA,
10}
11
12impl<FA> ApiOutputAdapter<FA>
13where
14	FA: EndpointFinishApi + Clone + 'static,
15{
16	#[inline]
17	fn new(api: FA) -> Self {
18		ApiOutputAdapter { api }
19	}
20}
21
22impl<FA> TopEncodeOutput for ApiOutputAdapter<FA>
23where
24	FA: EndpointFinishApi + Clone + 'static,
25{
26	fn set_slice_u8(self, bytes: &[u8]) {
27		self.api.finish_slice_u8(bytes);
28	}
29
30	fn set_u64(self, value: u64) {
31		self.api.finish_u64(value);
32	}
33
34	fn set_i64(self, value: i64) {
35		self.api.finish_i64(value);
36	}
37
38	#[inline]
39	fn set_unit(self) {
40		// nothing: no result produced
41	}
42
43	#[inline]
44	fn set_big_int_handle_or_bytes<F: FnOnce() -> Vec<u8>>(self, handle: i32, _else_bytes: F) {
45		self.api.finish_big_int_raw(handle);
46	}
47
48	#[inline]
49	fn set_big_uint_handle_or_bytes<F: FnOnce() -> Vec<u8>>(self, handle: i32, _else_bytes: F) {
50		self.api.finish_big_uint_raw(handle);
51	}
52}
53
54/// All types that are returned from endpoints need to implement this trait.
55pub trait EndpointResult: Sized {
56	/// Indicates how the result of the endpoint can be interpreted when called via proxy.
57	/// `Self` for most types.
58	type DecodeAs;
59
60	fn finish<FA>(&self, api: FA)
61	where
62		FA: EndpointFinishApi + Clone + 'static;
63}
64
65/// All serializable objects can be used as smart contract function result.
66impl<T> EndpointResult for T
67where
68	T: TopEncode,
69{
70	type DecodeAs = Self;
71
72	fn finish<FA>(&self, api: FA)
73	where
74		FA: EndpointFinishApi + Clone + 'static,
75	{
76		self.top_encode_or_exit(ApiOutputAdapter::new(api.clone()), api, finish_exit);
77	}
78}
79
80#[inline(always)]
81fn finish_exit<FA>(api: FA, en_err: EncodeError) -> !
82where
83	FA: EndpointFinishApi + ErrorApi + 'static,
84{
85	api.signal_error(en_err.message_bytes())
86}
numbat_wasm/io/finish.rs

numbat_wasm/io/
finish.rs
