checksum validation on genesis bridge

[mtsitrin]

          possibly a quick win to validate using json checksum.

golang:

package main

import (
	"crypto/sha256"
	"encoding/hex"
	"encoding/json"
	"fmt"
	"io/ioutil"
	"sort"
)

func getJSONChecksum(filePath string) (string, error) {
	fileContent, err := ioutil.ReadFile(filePath)
	if err != nil {
		return "", err
	}

	var jsonObject map[string]interface{}
	err = json.Unmarshal(fileContent, &jsonObject)
	if err != nil {
		return "", err
	}

	keys := make([]string, 0, len(jsonObject))
	for k := range jsonObject {
		keys = append(keys, k)
	}
	sort.Strings(keys)

	sortedJSON, err := json.Marshal(jsonObject)
	if err != nil {
		return "", err
	}

	hash := sha256.Sum256(sortedJSON)
	return hex.EncodeToString(hash[:]), nil
}

func main() {
	checksum, err := getJSONChecksum("path/to/your/file.json")
	if err != nil {
		fmt.Println("Error:", err)
		return
	}
	fmt.Println("Checksum:", checksum)
}

and roller can use same method for vadlidate it or through cli:

jq -cS . file.json | sha256sum

Originally posted by @omritoptix in https://github.com/dymensionxyz/dymension-rdk/pull/565#discussion_r1787713387