Struct ssz::SszEncoder [−][src]
pub struct SszEncoder<'a> { /* fields omitted */ }
Expand description
Allow for encoding an ordered series of distinct or indistinct objects as SSZ bytes.
You must call finalize(..)
after the final append(..)
call to ensure the bytes are
written to buf
.
Example
Use SszEncoder
to produce identical output to foo.as_ssz_bytes()
:
use ssz_derive::{Encode, Decode};
use ssz::{Decode, Encode, SszEncoder};
#[derive(PartialEq, Debug, Encode, Decode)]
struct Foo {
a: u64,
b: Vec<u16>,
}
fn ssz_encode_example() {
let foo = Foo {
a: 42,
b: vec![1, 3, 3, 7]
};
let mut buf: Vec<u8> = vec![];
let offset = <u64 as Encode>::ssz_fixed_len() + <Vec<u16> as Encode>::ssz_fixed_len();
let mut encoder = SszEncoder::container(&mut buf, offset);
encoder.append(&foo.a);
encoder.append(&foo.b);
encoder.finalize();
assert_eq!(foo.as_ssz_bytes(), buf);
}
Implementations
Instantiate a new encoder for encoding a SSZ container.
Uses ssz_append
to append the encoding of some item to the SSZ bytes.