Shards

This repository will hold code for all of the shard types Phore develops.

Building

Go into one of the shard directories and run:

cargo build --target wasm32-unknown-unknown

The result will be in: target/debug/*_shard.wasm.

Building for Release

For release, we optimize the wasm file for size by running:

cargo build --release --target wasm32-unknown-unknown

The result will be in: target/release/*_shard.wasm.

To strip the resulting wasm files of the wasm file, install the wabt package run:

wasm-strip target/wasm32-unknown-unknown/release/*_shard.wasm

Importing Phore functions

To import functions from the Phore package, add this to the top of any shard code:

use std::ffi;

#[link(wasm_import_module = "phore")]
extern {
    pub fn load(addr: &[u8; 32]) -> [u8; 32];
    pub fn store(addr: &[u8; 32], val: &[u8; 32]);
    pub fn validateECDSA(hashAddr: &[u8; 32], signatureAddr: &[u8; 65], out: &mut[u8; 33]) -> i64;
    pub fn hash(data: *const u8, length: usize) -> [u8; 32];
    pub fn loadArgument(arg_num: i32, out: *mut ffi::c_void);
    pub fn write_log(msg: *const u8, length: usize);
}