GO Go verifier

go get github.com/xeipuuv/gojsonschema

package main

import (
	"encoding/json"; "fmt"; "os"
	"github.com/xeipuuv/gojsonschema"
)

func main() {
	path   := os.Args[1]
	raw, _ := os.ReadFile(path)

	var doc struct {
		Source  struct{ Hash struct{ Value string `json:"value"` } `json:"hash"` } `json:"source"`
		Lineage []struct{ Step int; InputHash, OutputHash string `json:"input_hash,output_hash"` } `json:"lineage"`
	}
	json.Unmarshal(raw, &doc)

	// structural
	result, _ := gojsonschema.Validate(
		gojsonschema.NewReferenceLoader("https://usemakoto.dev/schema/v0.1.json"),
		gojsonschema.NewReferenceLoader("file://"+path),
	)
	for _, e := range result.Errors() { fmt.Printf("✗ [%s] %s\n", e.Field(), e.Description()) }

	// provenance
	s := doc.Lineage
	for i := 1; i < len(s); i++ {
		if s[i].InputHash != s[i-1].OutputHash {
			fmt.Printf("✗ step %d input_hash does not match step %d output_hash\n", s[i].Step, s[i-1].Step)
		}
	}
	if s[len(s)-1].OutputHash != doc.Source.Hash.Value {
		fmt.Println("✗ final output_hash does not match source.hash.value")
	}
}