protobuf3-solidity-lib's Introduction

protobuf3-solidity-lib

Codec library for protobuf3 in Solidity. This library provides encoding and decoding functions for core protobuf3 types.

Overview

Installation

npm install --save @lazyledger/protobuf3-solidity-lib

Usage

Import the library in Solidity:

pragma solidity >=0.8.4 <0.9.0;

import "@lazyledger/protobuf3-solidity-lib/contracts/ProtobufLib.sol";

Building from source

Install dependencies:

npm install

Build:

npm run build

Test:

npm run test

Supported Features

type	decode	encode
key	✔️	✔️
varint	✔️	✔️
`int32`	✔️	✔️
`int64`	✔️	✔️
`uint32`	✔️	✔️
`uint64`	✔️	✔️
`sint32`	✔️	✔️
`sint64`	✔️	✔️
`fixed32`	✔️	✔️
`sfixed32`	✔️	✔️
`fixed64`	✔️	✔️
`sfixed64`	✔️	✔️
`bool`	✔️	✔️
enum	✔️	✔️
`string`	✔️	✔️
`bytes`	✔️	✔️
embedded messages	✔️	✔️
packed repeated	✔️	✔️

Unsupported Features

Start and end group deprecated wire types, float, double field types.

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protobuf3-solidity-lib's Issues

Seems like doesn't compile with 0.8.4 solidity.

Compiling 2 files with 0.8.4
TypeError: Unary operator - cannot be applied to type uint64
   --> @lazyledger/protobuf3-solidity-lib/contracts/ProtobufLib.sol:255:43:
    |
255 |         uint64 zigzag_val = (val >> 1) ^ (-(val & 1));
    |                                           ^^^^^^^^^^


TypeError: Unary operator - cannot be applied to type uint64
   --> @lazyledger/protobuf3-solidity-lib/contracts/ProtobufLib.sol:281:43:
    |
281 |         uint64 zigzag_val = (val >> 1) ^ (-(val & 1));
    |                                           ^^^^^^^^^^


TypeError: Explicit type conversion not allowed from "int32" to "uint64".
   --> @lazyledger/protobuf3-solidity-lib/contracts/ProtobufLib.sol:658:30:
    |
658 |         return encode_varint(uint64(n));
    |                              ^^^^^^^^^


Error HH600: Compilation failed

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