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package main
import (
"encoding/json"
"flag"
"log"
"os"
"path/filepath"
"strings"
"text/template"
"github.com/ethereum-optimism/optimism/op-bindings/ast"
"github.com/ethereum-optimism/optimism/op-bindings/hardhat"
)
type flags struct {
ArtifactsDir string
Contracts string
OutDir string
Package string
}
type data struct {
Name string
StorageLayout string
DeployedBin string
Package string
}
func main() {
var f flags
flag.StringVar(&f.ArtifactsDir, "artifacts", "", "Comma-separated list of directories containing artifacts and build info")
flag.StringVar(&f.OutDir, "out", "", "Output directory to put code in")
flag.StringVar(&f.Contracts, "contracts", "", "Comma-separated list of contracts to generate code for")
flag.StringVar(&f.Package, "package", "artifacts", "Go package name")
flag.Parse()
artifacts := strings.Split(f.ArtifactsDir, ",")
contracts := strings.Split(f.Contracts, ",")
if len(artifacts) == 0 {
log.Fatalf("must define a list of artifacts")
}
if len(contracts) == 0 {
log.Fatalf("must define a list of contracts")
}
hh, err := hardhat.New("dummy", artifacts, nil)
if err != nil {
log.Fatalln("error reading artifacts:", err)
}
t := template.Must(template.New("artifact").Parse(tmpl))
for _, name := range contracts {
art, err := hh.GetArtifact(name)
if err != nil {
log.Fatalf("error reading artifact %s: %v\n", name, err)
}
storage, err := hh.GetStorageLayout(name)
if err != nil {
log.Fatalf("error reading storage layout %s: %v\n", name, err)
}
canonicalStorage := ast.CanonicalizeASTIDs(storage)
ser, err := json.Marshal(canonicalStorage)
if err != nil {
log.Fatalf("error marshaling storage: %v\n", err)
}
serStr := strings.Replace(string(ser), "\"", "\\\"", -1)
d := data{
Name: name,
StorageLayout: serStr,
DeployedBin: art.DeployedBytecode.String(),
Package: f.Package,
}
fname := filepath.Join(f.OutDir, strings.ToLower(name)+"_more.go")
outfile, err := os.OpenFile(
fname,
os.O_RDWR|os.O_CREATE|os.O_TRUNC,
0o600,
)
if err != nil {
log.Fatalf("error opening %s: %v\n", fname, err)
}
if err := t.Execute(outfile, d); err != nil {
log.Fatalf("error writing template %s: %v", outfile.Name(), err)
}
outfile.Close()
log.Printf("wrote file %s\n", outfile.Name())
}
}
var tmpl = `// Code generated - DO NOT EDIT.
// This file is a generated binding and any manual changes will be lost.
package {{.Package}}
import (
"encoding/json"
"github.com/ethereum-optimism/optimism/op-bindings/solc"
)
const {{.Name}}StorageLayoutJSON = "{{.StorageLayout}}"
var {{.Name}}StorageLayout = new(solc.StorageLayout)
var {{.Name}}DeployedBin = "{{.DeployedBin}}"
func init() {
if err := json.Unmarshal([]byte({{.Name}}StorageLayoutJSON), {{.Name}}StorageLayout); err != nil {
panic(err)
}
layouts["{{.Name}}"] = {{.Name}}StorageLayout
deployedBytecodes["{{.Name}}"] = {{.Name}}DeployedBin
}
`