react-native-secp256k1

Getting started

$ npm install react-native-secp256k1 --save

Mostly automatic installation

$ react-native link react-native-secp256k1

Manual installation

iOS

1. In XCode, in the project navigator, right click Libraries ➜ Add Files to [your project's name]
2. Go to node_modules ➜ react-native-secp256k1 and add RNSecp256k1.xcodeproj
3. In XCode, in the project navigator, select your project. Add libRNSecp256k1.a to your project's Build Phases ➜ Link Binary With Libraries
4. Run your project (Cmd+R)<

Android

1. Open up android/app/src/main/java/[...]/MainActivity.java

• Add import com.reactlibrary.RNSecp256k1Package; to the imports at the top of the file
• Add new RNSecp256k1Package() to the list returned by the getPackages() method

2. Append the following lines to android/settings.gradle:

   include ':react-native-secp256k1'
   project(':react-native-secp256k1').projectDir = new File(rootProject.projectDir, 	'../node_modules/react-native-secp256k1/android')
   

3. Insert the following lines inside the dependencies block in android/app/build.gradle:

     compile project(':react-native-secp256k1')
   

Usage

import secp256k1 from 'react-native-secp256k1';

async function main() {
	const privA = await secp256k1.ext.generateKey();
	const privB = await secp256k1.ext.generateKey();

	const pubA = await secp256k1.computePubkey(privA, true);
	const pubB = await secp256k1.computePubkey(privB, true);

	// sign verify
	const data = "1H1SJuGwoSFTqNI8wvVWEdGRpBvTnzLckoZ1QTF7gI0";
	const sigA = await secp256k1.sign(data, privA);
	console.log("verify: ", await secp256k1.verify(data, sigA, pubA));

	// ecdh && aes256
	const encryped1 = await secp256k1.ext.encryptECDH(privA, pubB, "Hello World");
	const decryped1 = await secp256k1.ext.decryptECDH(privB, pubA, encryped1);
	console.log(decryped1);

	// all: https://github.com/fingera/react-native-secp256k1-demo
}

main().then(() => {
	console.log("Done");
}).catch((err) => {
	console.error(err);
});