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cgo-kzg-4844

This package implements Go bindings (using Cgo) for the exported functions in C-KZG-4844.

Installation

go get github.com/ethereum/c-kzg-4844/bindings/go

Go version

This package requires 1.19rc1 or later. Version 1.19beta1 and before will not work. These versions have a linking issue and are unable to see blst functions.

Example

For example, a module with this source file:

package main

import "fmt"
import "encoding/hex"
import ckzg "github.com/ethereum/c-kzg-4844/bindings/go"

func main() {
	ret := ckzg.LoadTrustedSetupFile("trusted_setup.txt")
	if ret != ckzg.C_KZG_OK {
		panic("failed to load trusted setup")
	}
	defer ckzg.FreeTrustedSetup()

	blob := ckzg.Blob{1, 2, 3}
	commitment, ret := ckzg.BlobToKZGCommitment(blob)
	if ret != ckzg.C_KZG_OK {
		panic("failed to get commitment for blob")
	}
	fmt.Println(hex.EncodeToString(commitment[:]))
}

Will produce this output:

$ go run .
88f1aea383b825371cb98acfbae6c81cce601a2e3129461c3c2b816409af8f3e5080db165fd327db687b3ed632153a62

The trusted setup file in the example can be downloaded here:

https://github.com/ethereum/c-kzg-4844/raw/main/src/trusted_setup.txt

Tests

Run the tests with this command:

go test

Benchmarks

Run the benchmarks with this command:

go test -bench=Benchmark

Note

The go.mod and go.sum files are in the project's root directory because the bindings need access to the c-kzg-4844 source, but Go cannot reference files outside its module/package. The best way to deal with this is to make the whole project available, that way everything is accessible.

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