Streamline Ethereum, Solana and Tron operations. Effortlessly create transactions, interact with smart contracts, sign, and send transactions for a seamless blockchain experience.
License: BSD 3-Clause "New" or "Revised" License
I wanted to sign a message but encountered this error. I get the message in my application as a .json and I need to convert it to Eip712TypedData in order to sign it using this awesome package.
I wrote this code in order to transform the JSON into the variable:
import 'dart:convert';
import 'package:on_chain/on_chain.dart';
Eip712TypedData jsonToEip712TypedData(String jsonString) {
final jsonData = json.decode(jsonString);
final Map<String, dynamic> typesJson = jsonData['types'];
final Map<String, List<Eip712TypeDetails>> parsedTypes = {};
typesJson.forEach((typeName, typeFields) {
final fields = List<Map<String, dynamic>>.from(typeFields);
final List<Eip712TypeDetails> fieldsList = fields.map((field) {
return Eip712TypeDetails(
name: field['name'] as String,
type: field['type'] as String,
);
}).toList();
parsedTypes[typeName] = fieldsList;
});
final domainData = jsonData['domain'] as Map<String, dynamic>;
final domain = {
"name": domainData['name'],
"version": domainData['version'],
"chainId": BigInt.parse(domainData['chainId'].toString()),
"verifyingContract": domainData['verifyingContract'],
};
final messageData = jsonData['message'] as Map<String, dynamic>;
return Eip712TypedData(
types: parsedTypes,
primaryType: jsonData['primaryType'] as String,
domain: domain,
message: messageData,
);
}But I receive an error in:
final Map<String, dynamic> typesJson = jsonData['types'];Unhandled Exception: type 'String' is not a subtype of type 'int' of 'index'How can I solve this problem? Are there other ways to sign this message? Here is the JSON I receive:
{ "primaryType": "Order",
"types": {
"EIP712Domain": [
{
"name": "name",
"type": "string"
},
{
"name": "version",
"type": "string"
},
{
"name": "chainId",
"type": "uint256"
},
{
"name": "verifyingContract",
"type": "address"
}
],
"Order": [
{
"name": "salt",
"type": "uint256"
},
{
"name": "makerAsset",
"type": "address"
},
{
"name": "takerAsset",
"type": "address"
},
{
"name": "maker",
"type": "address"
},
{
"name": "receiver",
"type": "address"
},
{
"name": "allowedSender",
"type": "address"
},
{
"name": "makingAmount",
"type": "uint256"
},
{
"name": "takingAmount",
"type": "uint256"
},
{
"name": "offsets",
"type": "uint256"
},
{
"name": "interactions",
"type": "bytes"
}
]
},
"domain": {
"name": "1inch Aggregation Router",
"version": "5",
"chainId": 56,
"verifyingContract": "0x11111...960582"
},
"message": {
"salt": "4613...485",
"makerAsset": "0x55...955",
"takerAsset": "0xbb4c...c095c",
"maker": "0x04...f8ff0",
"receiver": "0x0eee00...63e7e4",
"allowedSender": "0x1d0ae...7ac63",
"makingAmount": "1000000000000000000",
"takingAmount": "913207530647947",
"offsets": "0x3800...00000000000",
"interactions": "0x63592c2b0000000000000000000000000000000000000000000000000000000065ff21820eee00137d807...000000000000000000000000000000000000000000000000000000000000000000000ffffffff39"
}
}Thank you so much in advance for your help and for creating and maintaining this fantastic package.
How to use the TronHTTPProvider while you are using it in example and I am getting it undefined?
Hi
Very impressed with your work here. It will benefit lots of developers.
I am dabbling in Flutterflow and Cardano Marlowe Playground - https://play.marlowe.iohk.io/ and was wondering whether a low-code option can be developed to use the json output from Marlowe playground (Blockly) and use it as a plugin for Flutterflow.
The suggested workflow for handling Marlowe Playground json output is with Marlowe ts-sdk - https://github.com/pixelpunch/cardano-marlowe-ts-sdk
Some examples here - https://docs.marlowe.iohk.io/tutorials/videos#marlowe-typescript-sdk-videos.
Your thoughts?
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
An Open Source Machine Learning Framework for Everyone
Django
The Web framework for perfectionists with deadlines.
Laravel
A PHP framework for web artisans
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
Some thing interesting about web. New door for the world.
A server is a program made to process requests and deliver data to clients.
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
Some thing interesting about visualization, use data art
Some thing interesting about game, make everyone happy.
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
Microsoft
Open source projects and samples from Microsoft.
Google
Google ❤️ Open Source for everyone.
Alibaba
Alibaba Open Source for everyone
D3
Data-Driven Documents codes.
Tencent
China tencent open source team.