SDK Quickstart - Polygon Developer Docs

This quickstart walks through the minimum OMS Wallet SDK flow: install an SDK, create the client, authenticate with email OTP, and send a first transaction from the non-custodial wallet.

TypeScript is for web, Node, and JavaScript apps. React Native is for iOS and Android apps using React Native, including Expo development builds and bare apps. Swift and Kotlin are native app SDKs.

1. Get a publishable key

Contact us to have your publishable key manually provisioned before getting started. SDK constructors pass this value as publishableKey, which selects the matching OMS Wallet environment for client SDK calls.

2. Install an SDK

TypeScript
React Native
Swift
Kotlin

pnpm add @0xsequence/typescript-sdk viem

pnpm add @0xsequence/oms-react-native-sdk@0.1.0-alpha.3

Add the package in Xcode with File -> Add Package Dependencies and enter the following git URL.

https://github.com/0xsequence/swift-sdk.git

dependencies {
    implementation("io.github.0xsequence:oms-client-kotlin-sdk:0.1.0-alpha.3")
}

3. Create the client

Create the client once when your app starts, then reuse it for wallet operations.

TypeScript
React Native
Swift
Kotlin

import { OMSClient } from '@0xsequence/typescript-sdk'

const oms = new OMSClient({
  publishableKey: 'YOUR_PUBLISHABLE_KEY',
})

import { OMSClient } from '@0xsequence/oms-react-native-sdk'

const oms = new OMSClient({
  publishableKey: 'YOUR_PUBLISHABLE_KEY',
})

import OMS_SDK

let oms = try OMSClient(publishableKey: "YOUR_PUBLISHABLE_KEY")

import com.omsclient.kotlin_sdk.OMSClient

val client = OMSClient(
    context = context,
    publishableKey = "YOUR_PUBLISHABLE_KEY",
)

4. Authenticate with email

Email authentication is a two-step OTP flow. Start auth, show your OTP input, then complete auth with the user-entered code.

TypeScript
React Native
Swift
Kotlin

await oms.wallet.startEmailAuth({ email: 'user@example.com' })

const { walletAddress } = await oms.wallet.completeEmailAuth({ code: '123456' })

console.log('Wallet address:', walletAddress)

await oms.wallet.startEmailAuth('user@example.com')

const result = await oms.wallet.completeEmailAuth({ code: '123456' })

if (result.type !== 'walletSelected') {
  throw new Error('Select or create a wallet before continuing')
}

console.log('Wallet address:', result.walletAddress)

try await oms.wallet.startEmailAuth(email: "user@example.com")

let result = try await oms.wallet.completeEmailAuth(code: "123456")

if case let .walletSelected(walletAddress, _, _, _) = result {
    print("Wallet address:", walletAddress)
}

import com.omsclient.kotlin_sdk.wallet.CompleteAuthResult

client.wallet.startEmailAuth("user@example.com")

val result = client.wallet.completeEmailAuth("123456")
check(result is CompleteAuthResult.WalletSelected)

println("Wallet address: ${result.walletAddress}")

5. Send a first transaction

Send a native token transaction on Polygon Amoy. Values are raw base-unit values.

TypeScript
React Native
Swift
Kotlin

import { Networks } from '@0xsequence/typescript-sdk'
import { parseEther, type Address } from 'viem'

const recipient = '0x1111111111111111111111111111111111111111' as Address

const tx = await oms.wallet.sendTransaction({
  network: Networks.amoy,
  to: recipient,
  value: parseEther('0'),
})

console.log('Transaction:', tx.txnHash ?? tx.txnId)

const tx = await oms.wallet.sendTransaction({
  chainId: '80002',
  to: '0x1111111111111111111111111111111111111111',
  value: '0',
})

console.log('Transaction:', tx.txnHash ?? tx.txnId)

let tx = try await oms.wallet.sendTransaction(
    network: .polygonAmoy,
    to: "0x1111111111111111111111111111111111111111",
    value: "0"
)

print("Transaction:", tx.txnHash ?? tx.txnId)

import com.omsclient.kotlin_sdk.Network
import java.math.BigInteger

val tx = client.wallet.sendTransaction(
    network = Network.AMOY,
    to = "0x1111111111111111111111111111111111111111",
    value = BigInteger.ZERO,
)

println("Transaction id: ${tx.txnId}")
println("Transaction hash: ${tx.txnHash}")

Next steps

SDK Overview

Compare available SDKs and find the detailed reference for each one.

Send USDC

Send an ERC-20 transfer from a non-custodial wallet.

SDK Authentication

Choose your SDK, then open its Authentication page for wallet selection and wallet creation.

Balances & History

Choose your SDK, then open its Balances & History page for indexer reads.

​1. Get a publishable key

​2. Install an SDK

​3. Create the client

​4. Authenticate with email

​5. Send a first transaction

​Next steps

SDK Overview

Send USDC

SDK Authentication

Balances & History

1. Get a publishable key

2. Install an SDK

3. Create the client

4. Authenticate with email

5. Send a first transaction

Next steps