Sign and verify with React Native - Polygon Developer Docs

Signing produces a signature without submitting a transaction. The React Native SDK signs and verifies against the active wallet, so these operations require a completed wallet session. The public verification methods do not accept an explicit wallet address.

Sign and verify a message

Use the same network and exact message for signing and verification:

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

const message = 'I authorize this action'

const signature = await omsWallet.wallet.signMessage({
  network: Networks.amoy,
  message,
})

const isValid = await omsWallet.wallet.isValidMessageSignature({
  network: Networks.amoy,
  message,
  signature,
})

isValidMessageSignature returns false when the signature does not validate for the active wallet, network, and message.

Sign and verify typed data

Pass the EIP-712 data as a JSON-serializable object:

const typedData = {
  domain: {
    name: 'Example',
    version: '1',
    chainId: 80002,
  },
  types: {
    Action: [{ name: 'description', type: 'string' }],
  },
  primaryType: 'Action',
  message: {
    description: 'Approve action',
  },
}

const signature = await omsWallet.wallet.signTypedData({
  network: Networks.amoy,
  typedData,
})

const isValid = await omsWallet.wallet.isValidTypedDataSignature({
  network: Networks.amoy,
  typedData,
  signature,
})

The chainId in the EIP-712 domain remains part of the signed payload. The wallet method also requires the corresponding exported network value.

Verification uses the currently active wallet. If the app switches wallets between signing and verification, switch back to the signer before calling the verification method.

Send transactions with React Native

React Native balances and history

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​Sign and verify a message

​Sign and verify typed data

Sign and verify a message

Sign and verify typed data