dart_kzg_4844_util

Description:

dart kzg 4844 util

dart_kzg_4844_util #
For EIP-4844, dart impl
source project #
c-kzg-4844
import 'package:convert/convert.dart';
import 'package:dart_kzg_4844_util/dart_kzg_4844_util.dart';
import 'package:flutter/material.dart';

void main() {
runApp(const MyApp());
}

class MyApp extends StatefulWidget {
const MyApp({super.key});

@override
State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
BlobTxSidecar? sidecar;
BlobTxSidecar? blob20Sidecar;
KzgSetting? kzgSetting;

@override
void initState() {
_kzgTest();
super.initState();
}

@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(),
body: Column(
children: [
if (sidecar != null) sidecarView(),
if (blob20Sidecar != null) blob20SidecarView(),
],
)),
);
}

void _kzgTest() async {
await DartKzg4844Util.init();
await loadSetting();
_generateCommitmentAndProof();
_blob20CommitmentAndProof();
}

Future<void> loadSetting() async {
kzgSetting = await KzgSetting.loadFromFile('assets/trusted_setup.json');
}

Widget sidecarView() {
return Column(
mainAxisSize: MainAxisSize.min,
children: List.generate(sidecar!.blobs.length, (index) {
return Column(
mainAxisSize: MainAxisSize.min,
children: [
Text(
"commitment = ${hex.encode(sidecar!.commitments[index].commitment)}"),
Text("proof = ${hex.encode(sidecar!.proofs[index].proof)}"),
Text("hash = ${hex.encode(sidecar!.blobHashes()[index])}"),
const Divider(),
],
);
}).toList(),
);
}

Widget blob20SidecarView() {
return Column(
mainAxisSize: MainAxisSize.min,
children: List.generate(blob20Sidecar!.blobs.length, (index) {
return Column(
mainAxisSize: MainAxisSize.min,
children: [
Text(
"commitment = ${hex.encode(blob20Sidecar!.commitments[index].commitment)}"),
Text("proof = ${hex.encode(blob20Sidecar!.proofs[index].proof)}"),
Text("hash = ${hex.encode(blob20Sidecar!.blobHashes()[index])}"),
const Divider(),
],
);
}).toList(),
);
}

void _generateCommitmentAndProof() async {
final blobs = <Blob>[];
final commitments = <KzgCommitment>[];
final proofs = <KzgProof>[];

/// blob1
// blobs.add(await Blob.randBlob());
/// commitments hash with Blob contain all 0
/// 010657f37554c781402a22917dee2f75def7ab966d7b770905398eba3c444014
/// blob2
blobs.add(Blob.zeroBlob()); // 全0

for (var b in blobs) {
final commit = await Kzg4844.kzgBlobToCommitment(b, kzgSetting!);
commitments.add(commit);
final p = await Kzg4844.kzgComputeBlobKzgProof(b, commit, kzgSetting!);
proofs.add(p);
}

sidecar = BlobTxSidecar(
blobs: blobs,
commitments: commitments,
proofs: proofs,
);

setState(() {});
}

void _blob20CommitmentAndProof() async {
// https://etherscan.io/blob/0x01fc0a717777b0e983ce71eecae52ae24bdfd06459801ba5c20692ef11ca75c9?bid=706618
const mintBlob20 =
'{"protocol":"blob20","token":{"operation":"mint","ticker":"ETHS","amount":1000}}';

final cborData = cborEncodeApplicationJson(mintBlob20);
final blobs = cborDataToESIP8Blobs(cborData);
final commitments = <KzgCommitment>[];
final proofs = <KzgProof>[];

for (var b in blobs) {
final commit = await Kzg4844.kzgBlobToCommitment(b, kzgSetting!);
commitments.add(commit);
final p = await Kzg4844.kzgComputeBlobKzgProof(b, commit, kzgSetting!);
proofs.add(p);
}

blob20Sidecar = BlobTxSidecar(
blobs: blobs,
commitments: commitments,
proofs: proofs,
);
setState(() {});
}
}

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