status-im
/
eth2.0-specs
mirror of https://github.com/status-im/eth2.0-specs.git
2
0
Fork 0
Code Issues Projects Releases Wiki Activity

improve type wording based on PR 1292 feedback

This commit is contained in:
protolambda 2019-07-15 00:12:12 +02:00
parent 5a13684c7f
commit d9fd1d3a2a
No known key found for this signature in database
GPG Key ID: EC89FDBB2B4C7623
1 changed files with 4 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
specs/simple-serialize.md
View File

@ -175,11 +175,12 @@ Note that deserialization requires hardening against invalid inputs. A non-exhau
We first define helper functions:
* `size_of(B)`, where `B` is a basic type: the length, in bytes, of the serialized form of the basic type.
* `chunk_count(type)`: calculate the amount of leafs for merkleization of the type.
* all basic types: `1`
* bitlists and bitvectors: `(N + 255) // 256` (dividing by chunk size, rounding up)
* lists and vectors of basic types: `N * item_length(elem_type) + 31) // 32` (dividing by chunk size, rounding up)
* lists and vectors of composite types: `N`
* `Bitlist[N]` and `Bitvector[N]`: `(N + 255) // 256` (dividing by chunk size, rounding up)
* `List[B, N]` and `Vector[B, N]`, where `B` is a basic type: `(N * size_of(B) + 31) // 32` (dividing by chunk size, rounding up)
* `List[C, N]` and `Vector[C, N]`, where `C` is a composite type: `N`
* containers: `len(fields)`
* `bitfield_bytes(bits)`: return the bits of the bitlist or bitvector, packed in bytes, aligned to the start. Exclusive length-delimiting bit for bitlists.
* `pack`: Given ordered objects of the same basic type, serialize them, pack them into `BYTES_PER_CHUNK`-byte chunks, right-pad the last chunk with zero bytes, and return the chunks.