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66 changes: 66 additions & 0 deletions
66
packages/examples/reactNativeSdkDemo/src/screens/DemoSign.tsx
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,66 @@ | ||
| import { useSDK } from '@metamask/sdk-react-native'; | ||
| import React, { useEffect, useState } from 'react'; | ||
| import { | ||
| Button, | ||
| Text, | ||
| View, | ||
| } from 'react-native'; | ||
| import { ethers } from 'ethers'; | ||
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| export function DemoSignView(): React.JSX.Element { | ||
| const { provider: MMProvider, account, connected } = useSDK(); | ||
| const [provider, setProvider] = useState<ethers.providers.Web3Provider>(); | ||
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| useEffect(() => { | ||
| if (connected && MMProvider && !provider) { | ||
| // The following line will crash the app | ||
| // if the option `infuraAPIKey` is provided to the MetaMaskProvider | ||
| // We have this error on the ios sdk side: metamask-ios-sdk/Network.swift:46 | ||
| // *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Invalid type in JSON write (_NSInlineData)' | ||
| const provider = new ethers.providers.Web3Provider( | ||
| MMProvider | ||
| ); | ||
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| setProvider(provider); | ||
| } | ||
| }, [connected, MMProvider, setProvider]); | ||
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| return ( | ||
| <> | ||
| <Text> | ||
| Sign Demo | ||
| </Text> | ||
| { | ||
| (!provider || !account) | ||
| ? <Text> User is not connected</Text> | ||
| : <DemoSignComponent account={account} provider={provider} /> | ||
| } | ||
| </> | ||
| ); | ||
| } | ||
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| function DemoSignComponent({ account, provider }: { account: string; provider: ethers.providers.Web3Provider }): React.JSX.Element { | ||
| const [signature, setSignature] = useState<string>(); | ||
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| async function sign() { | ||
| const signer = provider.getSigner(account); | ||
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| const signature = await signer.signMessage('Hello'); | ||
| setSignature(signature); | ||
| } | ||
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| return ( | ||
| <View> | ||
| <Text> | ||
| Sign message with address: {account} | ||
| </Text> | ||
| <Button title="Sign" onPress={sign} /> | ||
| <Text> | ||
| Signature: {signature} | ||
| </Text> | ||
| </View> | ||
| ); | ||
| } |
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