168 lines
11 KiB
TypeScript
168 lines
11 KiB
TypeScript
import { useEffect, useId, useRef, useState, type FormEvent } from 'react';
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import { exportWallet, restoreWallet, protectWallet, unlockWallet, lockWallet, walletStatus, subscribeWallet,
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type WalletStatus, type Wallet } from './wallet.ts';
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import { NETWORK } from '../shared/network.ts';
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type Props = {
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wallet: Wallet | undefined;
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onRestore: (wallet: Wallet) => void;
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onNotice: (message: string) => void;
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};
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export function WalletPanel({ wallet, onRestore, onNotice }: Props) {
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const id = useId();
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const [password, setPassword] = useState('');
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const [confirmation, setConfirmation] = useState('');
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const [importPassword, setImportPassword] = useState('');
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const [file, setFile] = useState<File>();
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const [replace, setReplace] = useState(false);
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const [busy, setBusy] = useState(false);
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const [status,setStatus] = useState<WalletStatus>();
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const [localPassword,setLocalPassword] = useState('');
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const [localConfirmation,setLocalConfirmation] = useState('');
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const [error,setError] = useState('');
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const inProgress = useRef(false);
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const fileInput = useRef<HTMLInputElement>(null);
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useEffect(()=>{
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let active=true;
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const load=()=>{void walletStatus().then(s=>{if(active)setStatus(s);}).catch(()=>{if(active)setError('Wallet storage unavailable.');});};
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load();const unsubscribe=subscribeWallet(()=>{
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setPassword('');setConfirmation('');setImportPassword('');setLocalPassword('');setLocalConfirmation('');load();
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});
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const clear=()=>{if(document.visibilityState!=='visible'){setPassword('');setConfirmation('');setImportPassword('');setLocalPassword('');setLocalConfirmation('');}};
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document.addEventListener('visibilitychange',clear);
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return()=>{active=false;unsubscribe();document.removeEventListener('visibilitychange',clear);};
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},[]);
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async function open(event: FormEvent<HTMLFormElement>) {
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event.preventDefault(); if(inProgress.current||!status)return;
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if(status!=='locked'&&(localPassword.length<12||localPassword!==localConfirmation)) {setError('Choose at least 12 characters and confirm the local password.');return;}
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inProgress.current=true;setBusy(true);setError('');
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try {
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const opened= status==='locked'?await unlockWallet(localPassword):await protectWallet(localPassword);
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onRestore(opened);onNotice('Wallet unlocked in this tab. Locking or leaving the tab clears its signing session.');
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} catch(e) {setError(e instanceof Error?e.message:'Could not unlock wallet.');}
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finally {setLocalPassword('');setLocalConfirmation('');inProgress.current=false;setBusy(false);setStatus(await walletStatus());}
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}
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async function download(event: FormEvent<HTMLFormElement>) {
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event.preventDefault();
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if (inProgress.current || !wallet) return;
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if (password.length < 12 || password.length > 1024 || password !== confirmation) {
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onNotice('Use a password of 12–1024 characters and enter it identically twice.');
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return;
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}
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inProgress.current = true;
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setBusy(true);
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try {
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const backup = await exportWallet(wallet, password);
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const url = URL.createObjectURL(new Blob([JSON.stringify(backup, null, 2)], { type: 'application/json' }));
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const link = document.createElement('a');
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link.href = url;
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link.download = `${NETWORK}-wallet-${wallet.address}.json`;
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document.body.append(link);
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try { link.click(); }
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finally {
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link.remove();
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// Let the browser start consuming the download before revocation.
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setTimeout(() => URL.revokeObjectURL(url), 1000);
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}
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onNotice('Encrypted backup download requested. Keep the file and password safe; test recovery before relying on it.');
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} catch { onNotice('Could not export the wallet. Check browser support and try again.'); }
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finally {
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setPassword('');
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setConfirmation('');
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inProgress.current = false;
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setBusy(false);
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}
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}
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async function recover(event: FormEvent<HTMLFormElement>) {
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event.preventDefault();
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if (inProgress.current) return;
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if (!file || file.size === 0 || file.size > 32 * 1024) {
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onNotice('Choose a nonempty wallet backup JSON file no larger than 32 KB.');
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return;
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}
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if (status !== 'empty' && !replace) {
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onNotice('Confirm replacement of the active wallet first. Back it up before continuing.');
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return;
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}
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inProgress.current = true;
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setBusy(true);
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try {
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if(localPassword.length<12||localPassword!==localConfirmation)throw new Error('Choose and confirm a local encryption password of at least 12 characters.');
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// Size checked before reading; the shared decoder validates all JSON fields.
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const backup: unknown = JSON.parse(await file.text());
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const recovered = await restoreWallet(backup, importPassword, localPassword, replace);
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onRestore(recovered);
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onNotice('Wallet recovered into encrypted local storage. Other tabs are locked; keep the backup safe.');
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setFile(undefined);
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setReplace(false);
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if (fileInput.current) fileInput.current.value = '';
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} catch {
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onNotice('Recovery failed. Check the password, backup format and network, and browser storage. The backup must be intact.');
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} finally {
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setImportPassword('');
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setLocalPassword('');setLocalConfirmation('');
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inProgress.current = false;
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setBusy(false);
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}
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}
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return <section aria-labelledby={`${id}-title`} aria-busy={busy}>
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<h2 id={`${id}-title`}>Wallet backup & recovery</h2>
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<p>Local P-256 wallet for {NETWORK}. Status: <strong>{status??'checking storage'}</strong>.</p>
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<p>New and migrated keys are encrypted in IndexedDB. Unlocking keeps an exportable signing key only in this tab’s memory.
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Lock manually, after five idle minutes, after four hours, or automatically when the tab is hidden.
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Encryption does not protect an unlocked page from malicious same-origin scripts or extensions. Clearing site data without a backup loses access.</p>
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{status==='legacy'&&<p role="alert"><strong>Existing unencrypted wallet detected.</strong> Encrypt the same identity below; migration never generates a replacement key. The original record is replaced only after encrypted storage commits. Existing disk copies/backups may still contain the old plaintext key.</p>}
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{error&&<p role="alert" className="transfer-error">{error}</p>}
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{wallet?<button type="button" onClick={()=>{lockWallet();setPassword('');setConfirmation('');setImportPassword('');setLocalPassword('');setLocalConfirmation('');}} disabled={busy}>Lock wallet now</button>:<form onSubmit={open}><fieldset disabled={busy||!status}>
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<legend>{status==='locked'?'Unlock encrypted local wallet':status==='legacy'?'Encrypt existing wallet':'Create encrypted wallet'}</legend>
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<label htmlFor={`${id}-local-password`}>Local wallet password {status!=='locked'?'(at least 12 characters)':''}</label>
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<input id={`${id}-local-password`} type="password" autoComplete={status==='locked'?'current-password':'new-password'} required maxLength={1024} minLength={status==='locked'?1:12} value={localPassword} onChange={e=>setLocalPassword(e.target.value)}/>
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{status!=='locked'&&<><label htmlFor={`${id}-local-confirm`}>Confirm local password</label><input id={`${id}-local-confirm`} type="password" autoComplete="new-password" required minLength={12} maxLength={1024} value={localConfirmation} onChange={e=>setLocalConfirmation(e.target.value)}/></>}
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<button type="submit">{status==='locked'?'Unlock wallet':status==='legacy'?'Encrypt existing wallet':'Create encrypted wallet'}</button>
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</fieldset></form>}
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<p>Backup encryption and recovery happen locally. No private key, backup file, or password is transmitted to a server
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by this panel. Public addresses, public keys and signatures may be shared during normal wallet use.</p>
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<p><strong>Forgotten backup passwords cannot be reset or recovered.</strong> Keep the encrypted file and a strong,
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unique password safe and separate. Anyone with both can control this wallet. Downloading does not guarantee the file was saved.</p>
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<form onSubmit={download}>
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<fieldset disabled={busy || !wallet}>
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<legend>Download encrypted backup</legend>
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<label htmlFor={`${id}-password`}>Backup password (at least 12 characters)</label>
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<input id={`${id}-password`} type="password" autoComplete="new-password" minLength={12} maxLength={1024}
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required value={password} onChange={event => setPassword(event.target.value)} />
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<label htmlFor={`${id}-confirm`}>Confirm backup password</label>
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<input id={`${id}-confirm`} type="password" autoComplete="new-password" minLength={12} maxLength={1024}
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required value={confirmation} onChange={event => setConfirmation(event.target.value)} />
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<button type="submit">Download encrypted backup</button>
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</fieldset>
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</form>
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<form onSubmit={recover}>
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<fieldset disabled={busy}>
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<legend>Recover from a local backup</legend>
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<label htmlFor={`${id}-file`}>Backup JSON file (maximum 32 KB)</label>
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<input ref={fileInput} id={`${id}-file`} type="file" accept=".json,application/json" required
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onChange={event => { setFile(event.target.files?.[0]); setReplace(false); }} />
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<label htmlFor={`${id}-import-password`}>Backup password</label>
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<input id={`${id}-import-password`} type="password" autoComplete="off" required maxLength={1024}
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value={importPassword} onChange={event => setImportPassword(event.target.value)} />
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<label htmlFor={`${id}-recover-local`}>New local encryption password (at least 12 characters)</label>
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<input id={`${id}-recover-local`} type="password" autoComplete="new-password" minLength={12} maxLength={1024} required value={localPassword} onChange={e=>setLocalPassword(e.target.value)}/>
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<label htmlFor={`${id}-recover-confirm`}>Confirm new local password</label>
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<input id={`${id}-recover-confirm`} type="password" autoComplete="new-password" minLength={12} maxLength={1024} required value={localConfirmation} onChange={e=>setLocalConfirmation(e.target.value)}/>
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{status!=='empty' && <label>
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<input type="checkbox" required checked={replace} onChange={event => setReplace(event.target.checked)} />
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I have backed up my active wallet and confirm replacing it. Recovery does not transfer its assets.
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</label>}
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<button type="submit" disabled={!status||!file || (status!=='empty' && !replace)}>Recover and save encrypted wallet</button>
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</fieldset>
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</form>
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</section>;
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}
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export default WalletPanel;
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