Press n or j to go to the next uncovered block, b, p or k for the previous block.
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import { E } from '@endo/eventual-send';
import { makeDefaultExo } from '@metamask/kernel-utils/exo';
import { Logger } from '@metamask/logger';
import type { Baggage } from '@metamask/ocap-kernel';
import {
decodeAllowanceResult,
decodeBalanceOfResult,
decodeDecimalsResult,
decodeNameResult,
decodeSymbolResult,
encodeAllowance,
encodeBalanceOf,
encodeDecimals,
encodeName,
encodeSymbol,
encodeTransfer,
} from '../lib/erc20.ts';
import {
buildBatchExecuteCallData,
buildSdkBatchRedeemCallData,
buildSdkDisableCallData,
buildSdkRedeemCallData,
computeSmartAccountAddress,
isEip7702Delegated,
prepareUserOpTypedData,
resolveEnvironment,
} from '../lib/sdk.ts';
import { ENTRY_POINT_V07 } from '../lib/userop.ts';
import type {
Action,
Address,
Caveat,
ChainConfig,
CreateDelegationOptions,
Delegation,
DelegationMatchResult,
Eip712TypedData,
Execution,
Hex,
SmartAccountConfig,
SwapQuote,
SwapResult,
TransactionRequest,
UserOperation,
WalletCapabilities,
} from '../types.ts';
const harden = globalThis.harden ?? (<T>(value: T): T => value);
/**
* Apply a percentage buffer to a hex gas value.
*
* @param gasHex - The gas value as a hex string.
* @param bufferPercent - The buffer percentage to add (e.g. 10 for 10%).
* @returns The buffered gas value as a hex string.
*/
function applyGasBuffer(gasHex: Hex, bufferPercent: number): Hex {
const gas = BigInt(gasHex);
const buffered = gas + (gas * BigInt(bufferPercent)) / 100n;
return `0x${buffered.toString(16)}`;
}
/**
* Validate that an `eth_estimateGas` response is a valid hex string.
*
* @param result - The raw RPC response.
* @returns The validated hex string.
* @throws If the result is not a hex string.
*/
function validateGasEstimate(result: unknown): Hex {
Iif (typeof result !== 'string' || !result.startsWith('0x')) {
throw new Error(
`eth_estimateGas returned unexpected value: ${String(result)}`,
);
}
return result as Hex;
}
/**
* Validate that a token `eth_call` response is a usable hex string.
*
* @param result - The raw RPC response.
* @param method - The ERC-20 method name (for error context).
* @param token - The token address (for error context).
* @returns The validated hex string.
* @throws If the result is not a non-empty hex string.
*/
function validateTokenCallResult(
result: unknown,
method: string,
token: Address,
): Hex {
if (
typeof result !== 'string' ||
!result.startsWith('0x') ||
result === '0x'
) {
throw new Error(
`${method}() call to token ${token} returned unexpected value: ${String(result)}`,
);
}
return result as Hex;
}
/**
* Convert a wei amount in hex to a human-readable ETH string.
*
* @param weiHex - The wei amount as a hex string.
* @returns A formatted string like "1.5 ETH".
*/
function weiToEth(weiHex: string): string {
const wei = BigInt(weiHex);
const whole = wei / 10n ** 18n;
const frac = wei % 10n ** 18n;
if (frac === 0n) {
return `${String(whole)} ETH`;
}
const fracStr = frac.toString().padStart(18, '0').replace(/0+$/u, '');
return `${String(whole)}.${fracStr} ETH`;
}
/**
* Convert a caveat to a human-readable description.
*
* @param caveat - The caveat to describe.
* @returns A human-readable string describing the caveat's constraint.
*/
function describeCaveat(caveat: Caveat): string {
switch (caveat.type) {
case 'nativeTokenTransferAmount':
return `total spend limit: ${weiToEth(caveat.terms)}`;
case 'valueLte':
return `max per tx: ${weiToEth(caveat.terms)}`;
case 'allowedTargets':
return 'restricted target addresses';
case 'allowedMethods':
return 'restricted methods';
case 'limitedCalls':
return 'limited number of calls';
case 'timestamp':
return 'time-limited';
case 'erc20TransferAmount': {
// ABI-encoded (address, uint256): 12 bytes padding + 20 bytes address + 32 bytes uint256
// In hex string: '0x' + 24 pad chars + 40 address chars + 64 amount chars = 130 chars
if (caveat.terms.length >= 130) {
try {
const token = `0x${caveat.terms.slice(26, 66)}`;
const amount = BigInt(`0x${caveat.terms.slice(66)}`);
return `ERC-20 transfer limit: ${amount.toString()} units on ${token}`;
} catch {
// Fall through to generic description
}
}
return 'ERC-20 transfer limit';
}
default:
return `${String(caveat.type)} enforced`;
}
}
/**
* Vat powers for the coordinator vat.
*/
type VatPowers = {
logger?: Logger;
};
/**
* Vat references available in the wallet subcluster.
*/
type WalletVats = {
keyring?: unknown;
provider?: unknown;
delegation?: unknown;
};
/**
* Services available to the wallet subcluster.
*/
type WalletServices = {
ocapURLIssuerService?: unknown;
ocapURLRedemptionService?: unknown;
};
// Typed facets for E() calls (avoid `any` by using explicit method signatures)
type KeyringFacet = {
initialize: (
options: { type: string; mnemonic?: string },
password?: string,
salt?: string,
) => Promise<void>;
unlock: (password: string) => Promise<void>;
isLocked: () => Promise<boolean>;
hasKeys: () => Promise<boolean>;
getAccounts: () => Promise<Address[]>;
deriveAccount: (index: number) => Promise<Address>;
signTransaction: (tx: TransactionRequest) => Promise<Hex>;
signTypedData: (data: Eip712TypedData, from?: Address) => Promise<Hex>;
signMessage: (message: string, from?: Address) => Promise<Hex>;
signHash: (hash: Hex, from?: Address) => Promise<Hex>;
signAuthorization: (options: {
contractAddress: Address;
chainId: number;
nonce?: number;
from?: Address;
}) => Promise<unknown>;
};
type ProviderFacet = {
configure: (config: ChainConfig) => Promise<void>;
request: (method: string, params?: unknown[]) => Promise<unknown>;
broadcastTransaction: (signedTx: Hex) => Promise<Hex>;
getChainId: () => Promise<number>;
getNonce: (address: Address) => Promise<number>;
getEntryPointNonce: (options: {
entryPoint: Address;
sender: Address;
key?: Hex;
}) => Promise<Hex>;
submitUserOp: (options: {
bundlerUrl: string;
entryPoint: Hex;
userOp: UserOperation;
}) => Promise<Hex>;
estimateUserOpGas: (options: {
bundlerUrl: string;
entryPoint: Hex;
userOp: UserOperation;
}) => Promise<{
callGasLimit: Hex;
verificationGasLimit: Hex;
preVerificationGas: Hex;
}>;
getUserOpReceipt: (options: {
bundlerUrl: string;
userOpHash: Hex;
}) => Promise<unknown>;
getGasFees: () => Promise<{
maxFeePerGas: Hex;
maxPriorityFeePerGas: Hex;
}>;
configureBundler: (config: {
bundlerUrl: string;
chainId: number;
}) => Promise<void>;
httpGetJson: (url: string) => Promise<unknown>;
getUserOperationGasPrice: () => Promise<{
fast: { maxFeePerGas: Hex; maxPriorityFeePerGas: Hex };
}>;
sponsorUserOp: (options: {
bundlerUrl: string;
entryPoint: Hex;
userOp: UserOperation;
context?: Record<string, unknown>;
}) => Promise<{
paymaster: Address;
paymasterData: Hex;
paymasterVerificationGasLimit: Hex;
paymasterPostOpGasLimit: Hex;
callGasLimit: Hex;
verificationGasLimit: Hex;
preVerificationGas: Hex;
}>;
};
type DelegationFacet = {
createDelegation: (
options: CreateDelegationOptions & { delegator: Address },
) => Promise<Delegation>;
prepareDelegationForSigning: (id: string) => Promise<Eip712TypedData>;
storeSigned: (id: string, signature: Hex) => Promise<void>;
receiveDelegation: (delegation: Delegation) => Promise<void>;
findDelegationForAction: (
action: Action,
chainId?: number,
currentTime?: number,
) => Promise<Delegation | undefined>;
explainActionMatch: (
action: Action,
chainId?: number,
currentTime?: number,
) => Promise<{ delegationId: string; result: DelegationMatchResult }[]>;
getDelegation: (id: string) => Promise<Delegation>;
listDelegations: () => Promise<Delegation[]>;
revokeDelegation: (id: string) => Promise<void>;
};
type PeerWalletFacet = {
getAccounts: () => Promise<Address[]>;
getCapabilities: () => Promise<WalletCapabilities>;
handleSigningRequest: (request: {
type: string;
tx?: TransactionRequest;
data?: Eip712TypedData;
message?: string;
account?: Address;
}) => Promise<Hex>;
registerAwayWallet: (awayRef: unknown) => Promise<void>;
registerDelegateAddress: (address: string) => Promise<void>;
handleRedemptionRequest: (request: {
type: 'single' | 'batch';
delegations: Delegation[];
execution?: Execution;
executions?: Execution[];
maxFeePerGas?: Hex;
maxPriorityFeePerGas?: Hex;
}) => Promise<Hex>;
};
type ExternalSignerFacet = {
getAccounts: () => Promise<Address[]>;
signTypedData: (data: Eip712TypedData, from: Address) => Promise<Hex>;
signMessage: (message: string, from: Address) => Promise<Hex>;
signTransaction: (tx: TransactionRequest) => Promise<Hex>;
};
type AwayWalletFacet = {
receiveDelegation: (delegation: Delegation) => Promise<void>;
revokeDelegationLocally: (id: string) => Promise<void>;
};
type OcapURLIssuerFacet = {
issue: (target: unknown) => Promise<string>;
};
type OcapURLRedemptionFacet = {
redeem: (url: string) => Promise<unknown>;
};
/**
* Build the root object for the coordinator vat (bootstrap vat).
*
* The coordinator orchestrates signing strategy resolution, delegation
* management, and peer wallet communication. It is the public API of
* the wallet subcluster.
*
* @param vatPowers - Special powers granted to this vat.
* @param _parameters - Initialization parameters.
* @param baggage - Root of vat's persistent state.
* @returns The root object for the coordinator vat.
*/
export function buildRootObject(
vatPowers: VatPowers,
_parameters: unknown,
baggage: Baggage,
): object {
const logger = (vatPowers.logger ?? new Logger()).subLogger({
tags: ['coordinator-vat'],
});
// References to other vats (set during bootstrap)
let keyringVat: KeyringFacet | undefined;
let providerVat: ProviderFacet | undefined;
let delegationVat: DelegationFacet | undefined;
let issuerService: OcapURLIssuerFacet | undefined;
let redemptionService: OcapURLRedemptionFacet | undefined;
// Peer wallet reference (set via connectToPeer)
let peerWallet: PeerWalletFacet | undefined;
// External signer reference (e.g. MetaMask).
// Note: external signers are transient — they must be reconnected after
// kernel restart via connectExternalSigner(). The baggage entry tracks
// the reference but it may be stale after resuscitation.
let externalSigner: ExternalSignerFacet | undefined;
// Bundler configuration for ERC-4337 UserOps
let bundlerConfig:
| {
bundlerUrl: string;
entryPoint: Hex;
chainId: number;
usePaymaster?: boolean;
sponsorshipPolicyId?: string;
}
| undefined;
// Smart account configuration (persisted in baggage)
let smartAccountConfig: SmartAccountConfig | undefined;
// Away wallet reference (set via registerAwayWallet from the away device).
// Note: like externalSigner, this is a transient CapTP reference — it will
// be stale after kernel restart. The baggage entry is restored but the
// remote endpoint may be gone. pushDelegationToAway() will fail at call
// time if the reference is dead.
let awayWallet: AwayWalletFacet | undefined;
// Delegate address sent by the away device for delegation creation
let pendingDelegateAddress: Address | undefined;
// Cached peer (home) accounts for offline autonomy
let cachedPeerAccounts: Address[] = [];
// Cached peer signing mode for offline autonomy
let cachedPeerSigningMode: string | undefined;
/**
* Typed helper for restoring values from baggage (resuscitation).
*
* @param key - The baggage key to look up.
* @returns The stored value cast to T, or undefined if not present.
*/
function restoreFromBaggage<T>(key: string): T | undefined {
return baggage.has(key) ? (baggage.get(key) as T) : undefined;
}
// Restore vat references from baggage if available (resuscitation)
keyringVat = restoreFromBaggage<KeyringFacet>('keyringVat');
providerVat = restoreFromBaggage<ProviderFacet>('providerVat');
delegationVat = restoreFromBaggage<DelegationFacet>('delegationVat');
peerWallet = restoreFromBaggage<PeerWalletFacet>('peerWallet');
externalSigner = restoreFromBaggage<ExternalSignerFacet>('externalSigner');
bundlerConfig = restoreFromBaggage<typeof bundlerConfig>('bundlerConfig');
smartAccountConfig =
restoreFromBaggage<SmartAccountConfig>('smartAccountConfig');
awayWallet = restoreFromBaggage<AwayWalletFacet>('awayWallet');
pendingDelegateAddress = restoreFromBaggage<Address>(
'pendingDelegateAddress',
);
cachedPeerAccounts =
restoreFromBaggage<Address[]>('cachedPeerAccounts') ?? [];
cachedPeerSigningMode = restoreFromBaggage<string>('cachedPeerSigningMode');
/** Chain ID from the last `configureProvider` call (avoids RPC on every send). */
let cachedProviderChainId: number | undefined = restoreFromBaggage<number>(
'cachedProviderChainId',
);
/**
* Resolve the wallet chain ID for delegation matching, SDK addresses, and txs.
*
* Order: bundler config → cached provider config → `eth_chainId` RPC.
*
* @returns The resolved chain ID.
*/
async function resolveChainId(): Promise<number> {
if (bundlerConfig?.chainId !== undefined) {
return bundlerConfig.chainId;
}
if (cachedProviderChainId !== undefined) {
return cachedProviderChainId;
}
Iif (!providerVat) {
throw new Error(
'Provider not configured — call configureProvider() first',
);
}
return E(providerVat).getChainId();
}
/**
* Whether smart-account operations for this sender should use Infura-style
* raw transactions (stateless 7702) instead of ERC-4337 UserOps.
*
* @param sender - Smart account address (same as EOA for stateless 7702).
* @returns True when direct EIP-1559 submission should be used.
*/
async function useDirect7702Tx(sender: Address): Promise<boolean> {
if (smartAccountConfig?.implementation === 'stateless7702') {
Iif (
smartAccountConfig.address !== undefined &&
smartAccountConfig.address.toLowerCase() !== sender.toLowerCase()
) {
// Config points at a different account — fall through to lazy check.
} else {
return true;
}
}
if (smartAccountConfig?.implementation === 'hybrid') {
return false;
}
Iif (!providerVat) {
throw new Error(
'Cannot determine account type: provider not configured and ' +
'smartAccountConfig is absent. Call configureProvider() first.',
);
}
const code = (await E(providerVat).request('eth_getCode', [
sender,
'latest',
])) as string;
const chainId = await resolveChainId();
return isEip7702Delegated(code, chainId);
}
/**
* Sign and broadcast a self-call tx with SDK-encoded DeleGator calldata
* (7702 EOA). Returns the transaction hash immediately after broadcast.
*
* @param options - Direct submission options.
* @param options.sender - Upgraded EOA / smart account address.
* @param options.callData - SDK-wrapped `execute` calldata.
* @param options.maxFeePerGas - Optional max fee per gas override.
* @param options.maxPriorityFeePerGas - Optional priority fee override.
* @returns The transaction hash from `eth_sendRawTransaction`.
*/
async function buildAndSubmitDirect7702Tx(options: {
sender: Address;
callData: Hex;
maxFeePerGas?: Hex;
maxPriorityFeePerGas?: Hex;
}): Promise<Hex> {
Iif (!providerVat) {
throw new Error('Provider vat not available');
}
const chainId = await resolveChainId();
let { maxFeePerGas, maxPriorityFeePerGas } = options;
if (!maxFeePerGas || !maxPriorityFeePerGas) {
const fees = await E(providerVat).getGasFees();
maxFeePerGas = maxFeePerGas ?? fees.maxFeePerGas;
maxPriorityFeePerGas = maxPriorityFeePerGas ?? fees.maxPriorityFeePerGas;
}
const nonce = await E(providerVat).getNonce(options.sender);
const estimatedGas = validateGasEstimate(
await E(providerVat).request('eth_estimateGas', [
{
from: options.sender,
to: options.sender,
data: options.callData,
},
]),
);
const gasLimit = applyGasBuffer(estimatedGas, 10);
const filledTx: TransactionRequest = {
from: options.sender,
to: options.sender,
chainId,
nonce,
maxFeePerGas,
maxPriorityFeePerGas,
gasLimit,
data: options.callData,
value: '0x0' as Hex,
};
const signedTx = await resolveTransactionSigning(filledTx);
return E(providerVat).broadcastTransaction(signedTx);
}
/**
* Poll until an EIP-1559 transaction is mined or timeout.
*
* @param options - Polling options.
* @param options.txHash - Transaction hash to wait for.
* @param options.pollIntervalMs - Delay between RPC polls in milliseconds.
* @param options.timeoutMs - Maximum time to wait in milliseconds.
* @returns Whether the mined transaction succeeded (`status` 0x1).
*/
async function pollTransactionReceipt(options: {
txHash: Hex;
pollIntervalMs?: number;
timeoutMs?: number;
}): Promise<{ success: boolean }> {
if (!providerVat) {
throw new Error('Provider not configured');
}
Iif (
typeof globalThis.Date?.now !== 'function' ||
typeof globalThis.setTimeout !== 'function'
) {
throw new Error(
'Transaction receipt polling requires Date.now and setTimeout',
);
}
const interval = options.pollIntervalMs ?? 2000;
const timeout = options.timeoutMs ?? 120_000;
const start = Date.now();
while (Date.now() - start < timeout) {
let receipt: { status?: string | number } | null = null;
try {
receipt = (await E(providerVat).request('eth_getTransactionReceipt', [
options.txHash,
])) as { status?: string | number } | null;
} catch (error) {
// Transient RPC errors (network hiccups, rate limits) should not
// abort polling — the tx was already broadcast and may still mine.
logger.warn(
`RPC error polling receipt for ${options.txHash}, will retry`,
error,
);
await new Promise((resolve) => setTimeout(resolve, interval));
continue;
}
if (receipt) {
// Normalize: some providers return status as a number (1) rather
// than the standard hex string ('0x1'). EIP-1559 receipts must have
// a status field; a missing one likely indicates a malformed response.
const { status } = receipt;
if (status === undefined || status === null) {
logger.warn(
`Receipt for ${options.txHash} has no status field — assuming success`,
);
return harden({ success: true });
}
const normalizedStatus =
typeof status === 'number' ? `0x${status.toString(16)}` : status;
return harden({ success: normalizedStatus === '0x1' });
}
await new Promise((resolve) => setTimeout(resolve, interval));
}
throw new Error(
`Transaction ${options.txHash} not mined after ${String(timeout)}ms`,
);
}
/**
* Check if an address belongs to the cached peer (home) accounts.
*
* @param address - The Ethereum address to check.
* @returns True if the address is a cached peer account.
*/
function isPeerAccount(address: Address): boolean {
return cachedPeerAccounts.some(
(a) => a.toLowerCase() === address.toLowerCase(),
);
}
/**
* Build a human-readable error message from delegation match results.
*
* @param matchResults - The match results from explainActionMatch.
* @param context - A message prefix describing the context.
* @returns A formatted error message string.
*/
function buildDelegationMismatchError(
matchResults: { delegationId: string; result: DelegationMatchResult }[],
context: string,
): string {
const reasons = matchResults
.filter((entry) => !entry.result.matches)
.map(
(entry) =>
`delegation ${entry.delegationId.slice(0, 10)}…: ${entry.result.reason ?? 'unknown'} (caveat: ${entry.result.failedCaveat ?? 'n/a'})`,
);
return `${context}. ${reasons.length} delegation(s) checked: ${reasons.join('; ')}`;
}
/**
* Resolve the EOA owner address from the keyring or external signer.
*
* @returns The first available EOA address.
* @throws If no accounts are available.
*/
async function resolveOwnerAddress(): Promise<Address> {
if (keyringVat) {
const accounts = await E(keyringVat).getAccounts();
if (accounts.length > 0) {
return accounts[0] as Address;
}
}
Iif (externalSigner) {
const accounts = await E(externalSigner).getAccounts();
if (accounts.length > 0) {
return accounts[0] as Address;
}
}
throw new Error('No accounts available');
}
const PEER_TIMEOUT_MS = 5000;
/**
* Race a promise against a timeout.
*
* @param promise - The promise to race.
* @param ms - Timeout in milliseconds.
* @returns The resolved value of the promise.
*/
async function raceWithTimeout<T>(
promise: Promise<T>,
ms: number,
): Promise<T> {
Iif (typeof globalThis.setTimeout !== 'function') {
return promise;
}
return new Promise<T>((resolve, reject) => {
const timer = globalThis.setTimeout(() => {
reject(new Error(`Peer call timed out after ${String(ms)}ms`));
}, ms);
// eslint-disable-next-line promise/catch-or-return
promise.then(
(value) => {
globalThis.clearTimeout(timer);
resolve(value);
return undefined;
},
(error: unknown) => {
globalThis.clearTimeout(timer);
reject(error instanceof Error ? error : new Error(String(error)));
return undefined;
},
);
});
}
/**
* Persist a baggage key-value pair, handling both init and update.
*
* @param key - The baggage key.
* @param value - The value to persist.
*/
function persistBaggage(key: string, value: unknown): void {
if (baggage.has(key)) {
baggage.set(key, value);
} else {
baggage.init(key, value);
}
}
/**
* Build a peer signing request for typed data.
*
* @param data - The typed data to sign.
* @param account - Optional account to sign with.
* @returns The peer signing request payload.
*/
function makeTypedDataSigningRequest(
data: Eip712TypedData,
account?: Address,
): { type: 'typedData'; data: Eip712TypedData; account?: Address } {
return account
? { type: 'typedData', data, account }
: { type: 'typedData', data };
}
/**
* Resolve the signing strategy for typed data.
* Priority: keyring → external signer → peer wallet → error
*
* @param data - The EIP-712 typed data to sign.
* @param from - Optional sender address.
* @returns The signature as a hex string.
*/
async function resolveTypedDataSigning(
data: Eip712TypedData,
from?: Address,
): Promise<Hex> {
// If the requested address belongs to the home device, route to peer
if (from && isPeerAccount(from)) {
if (peerWallet) {
return E(peerWallet).handleSigningRequest(
makeTypedDataSigningRequest(data, from),
);
}
throw new Error(
`Cannot sign typed data as ${from}: home device is offline and this address requires home signing authority`,
);
}
if (keyringVat) {
const hasKeys = await E(keyringVat).hasKeys();
Eif (hasKeys) {
return E(keyringVat).signTypedData(data, from);
}
}
if (externalSigner) {
const accounts = await E(externalSigner).getAccounts();
Eif (accounts.length > 0) {
return E(externalSigner).signTypedData(data, from ?? accounts[0]);
}
}
if (peerWallet) {
return E(peerWallet).handleSigningRequest(
makeTypedDataSigningRequest(data, from),
);
}
throw new Error('No authority to sign typed data');
}
/**
* Resolve the signing strategy for a personal message.
* Priority: keyring → external signer → peer wallet → error
*
* @param message - The message to sign.
* @param from - Optional sender address.
* @returns The signature as a hex string.
*/
async function resolveMessageSigning(
message: string,
from?: Address,
): Promise<Hex> {
// If the requested address belongs to the home device, route to peer
if (from && isPeerAccount(from)) {
if (peerWallet) {
return E(peerWallet).handleSigningRequest({
type: 'message',
message,
account: from,
});
}
throw new Error(
`Cannot sign message as ${from}: home device is offline and this address requires home signing authority`,
);
}
if (keyringVat) {
const hasKeys = await E(keyringVat).hasKeys();
Eif (hasKeys) {
return E(keyringVat).signMessage(message, from);
}
}
if (externalSigner) {
const accounts = await E(externalSigner).getAccounts();
Eif (accounts.length > 0) {
return E(externalSigner).signMessage(message, from ?? accounts[0]);
}
}
if (peerWallet) {
return E(peerWallet).handleSigningRequest({
type: 'message',
message,
...(from ? { account: from } : {}),
});
}
throw new Error('No authority to sign message');
}
/**
* Resolve the signing strategy for a transaction.
* Priority: local key → external signer → reject
*
* @param tx - The transaction request to sign.
* @returns The signed transaction as a hex string.
*/
async function resolveTransactionSigning(
tx: TransactionRequest,
): Promise<Hex> {
// Strategy 1: Check if local keyring owns this account
if (keyringVat) {
const accounts = await E(keyringVat).getAccounts();
if (accounts.includes(tx.from.toLowerCase() as Address)) {
return E(keyringVat).signTransaction(tx);
}
}
// Strategy 2: Check if external signer can handle it
if (externalSigner) {
return E(externalSigner).signTransaction({
...tx,
from: tx.from.toLowerCase() as Address,
});
}
throw new Error('No authority to sign this transaction');
}
/**
* Build, sign, and submit a UserOp. Shared pipeline for both delegation
* redemption and on-chain delegation revocation.
*
* @param options - Pipeline options.
* @param options.sender - The smart account address that sends the UserOp.
* @param options.callData - The encoded callData for the UserOp.
* @param options.maxFeePerGas - Optional max fee per gas override.
* @param options.maxPriorityFeePerGas - Optional max priority fee per gas override.
* @returns The UserOp hash from the bundler.
*/
async function buildAndSubmitUserOp(options: {
sender: Address;
callData: Hex;
maxFeePerGas?: Hex;
maxPriorityFeePerGas?: Hex;
}): Promise<Hex> {
Iif (!providerVat) {
throw new Error('Provider vat not available');
}
Iif (!bundlerConfig) {
throw new Error('Bundler not configured');
}
const { sender, callData } = options;
// Get gas prices from the bundler (pimlico_getUserOperationGasPrice)
// which returns prices the bundler will accept, avoiding rejection
// due to stale node-reported fees.
let { maxFeePerGas, maxPriorityFeePerGas } = options;
if (!maxFeePerGas || !maxPriorityFeePerGas) {
const gasPrice = await E(providerVat).getUserOperationGasPrice();
maxFeePerGas = maxFeePerGas ?? gasPrice.fast.maxFeePerGas;
maxPriorityFeePerGas =
maxPriorityFeePerGas ?? gasPrice.fast.maxPriorityFeePerGas;
}
// Get nonce from EntryPoint contract (ERC-4337 nonce)
const nonceHex = await E(providerVat).getEntryPointNonce({
entryPoint: bundlerConfig.entryPoint,
sender,
});
// Detect signing mode: check smartAccountConfig first, then fall back
// to on-chain code inspection. This ensures the correct signing mode
// even if smartAccountConfig is lost from baggage.
let isStateless7702 =
smartAccountConfig?.implementation === 'stateless7702';
// Always fetch on-chain code — needed for both factory detection and
// signing mode fallback.
const onChainCode = (await E(providerVat).request('eth_getCode', [
sender,
'latest',
])) as string | undefined;
Iif (typeof onChainCode !== 'string') {
throw new Error(
`eth_getCode for ${sender} returned ${String(onChainCode)}; check provider configuration`,
);
}
// Fall back to on-chain code detection for 7702 accounts that weren't
// configured via smartAccountConfig (e.g., restored from stale baggage).
// Any EIP-7702 designator prefix (0xef0100) indicates a Stateless7702
// DeleGator, which uses a different EIP-712 domain name for signing.
Iif (!isStateless7702 && onChainCode.toLowerCase().startsWith('0xef0100')) {
isStateless7702 = true;
}
// Check on-chain whether the smart account is deployed (eth_getCode).
// This avoids relying on a cached flag that could be stale if the
// deployment UserOp failed on-chain.
let includeFactory = false;
if (
!isStateless7702 &&
smartAccountConfig?.factory &&
smartAccountConfig.factoryData
) {
includeFactory = onChainCode === '0x' || onChainCode === '0x0';
Iif (!includeFactory && smartAccountConfig.deployed === false) {
smartAccountConfig = harden({
...smartAccountConfig,
deployed: true,
});
persistBaggage('smartAccountConfig', smartAccountConfig);
}
}
// Build unsigned UserOp with a dummy 65-byte signature so that the
// smart account's validateUserOp can parse the ECDSA signature during
// bundler/paymaster simulation. An empty signature (0x) causes revert.
const unsignedUserOp: UserOperation = {
sender,
nonce: nonceHex,
callData,
callGasLimit: '0x50000' as Hex,
verificationGasLimit: '0x60000' as Hex,
preVerificationGas: '0x10000' as Hex,
maxFeePerGas,
maxPriorityFeePerGas,
signature:
'0xfffffffffffffffffffffffffffffff0000000000000000000000000000000007aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa1c' as Hex,
...(includeFactory && smartAccountConfig
? {
factory: smartAccountConfig.factory as Hex,
factoryData: smartAccountConfig.factoryData as Hex,
}
: {}),
};
let userOpWithGas: UserOperation;
if (bundlerConfig.usePaymaster) {
// Use paymaster sponsorship instead of gas estimation
const sponsorContext: Record<string, unknown> = {};
if (bundlerConfig.sponsorshipPolicyId) {
sponsorContext.sponsorshipPolicyId = bundlerConfig.sponsorshipPolicyId;
}
const sponsorResult = await E(providerVat).sponsorUserOp({
bundlerUrl: bundlerConfig.bundlerUrl,
entryPoint: bundlerConfig.entryPoint,
userOp: unsignedUserOp,
context: sponsorContext,
});
userOpWithGas = {
...unsignedUserOp,
paymaster: sponsorResult.paymaster,
paymasterData: sponsorResult.paymasterData,
paymasterVerificationGasLimit:
sponsorResult.paymasterVerificationGasLimit,
paymasterPostOpGasLimit: sponsorResult.paymasterPostOpGasLimit,
callGasLimit: sponsorResult.callGasLimit,
verificationGasLimit: sponsorResult.verificationGasLimit,
preVerificationGas: sponsorResult.preVerificationGas,
};
} else {
// Estimate gas via bundler
const gasEstimate = await E(providerVat).estimateUserOpGas({
bundlerUrl: bundlerConfig.bundlerUrl,
entryPoint: bundlerConfig.entryPoint,
userOp: unsignedUserOp,
});
userOpWithGas = {
...unsignedUserOp,
callGasLimit: applyGasBuffer(gasEstimate.callGasLimit, 10),
verificationGasLimit: applyGasBuffer(
gasEstimate.verificationGasLimit,
10,
),
preVerificationGas: gasEstimate.preVerificationGas,
};
}
// Sign the UserOp via EIP-712 typed data. Both Hybrid and Stateless7702
// DeleGators validate signatures using EIP-712 — the only difference is
// the domain name.
const userOpTypedData = prepareUserOpTypedData({
userOp: userOpWithGas,
entryPoint: bundlerConfig.entryPoint,
chainId: bundlerConfig.chainId,
smartAccountAddress: sender,
...(isStateless7702
? { smartAccountName: 'EIP7702StatelessDeleGator' }
: {}),
});
const signature: Hex = await resolveTypedDataSigning(userOpTypedData);
// Attach signature and submit
const signedUserOp: UserOperation = {
...userOpWithGas,
signature,
};
return E(providerVat).submitUserOp({
bundlerUrl: bundlerConfig.bundlerUrl,
entryPoint: bundlerConfig.entryPoint,
userOp: signedUserOp,
});
}
/**
* Build, sign, and submit a UserOp that redeems one or more delegations.
*
* @param options - UserOp pipeline options.
* @param options.delegations - The delegation chain (leaf to root).
* @param options.execution - The execution to perform.
* @param options.maxFeePerGas - Max fee per gas.
* @param options.maxPriorityFeePerGas - Max priority fee per gas.
* @returns The UserOp hash from the bundler.
*/
async function submitDelegationUserOp(options: {
delegations: Delegation[];
execution: Execution;
maxFeePerGas?: Hex | undefined;
maxPriorityFeePerGas?: Hex | undefined;
}): Promise<Hex> {
// Check the relay path first — it forwards raw delegations/execution to
// the home wallet and does not need local chain ID or SDK calldata.
if (!bundlerConfig && !smartAccountConfig) {
if (peerWallet) {
try {
return await E(peerWallet).handleRedemptionRequest({
type: 'single',
delegations: options.delegations,
execution: options.execution,
maxFeePerGas: options.maxFeePerGas,
maxPriorityFeePerGas: options.maxPriorityFeePerGas,
});
} catch (relayError) {
const detail =
relayError instanceof Error
? relayError.message
: String(relayError);
throw new Error(
`Failed to relay delegation redemption to home wallet: ${detail}`,
{ cause: relayError },
);
}
}
throw new Error(
'Bundler not configured and no peer wallet available for relay',
);
}
const sender =
smartAccountConfig?.address ?? options.delegations[0].delegate;
const chainId = await resolveChainId();
const sdkCallData = buildSdkRedeemCallData({
delegations: options.delegations,
execution: options.execution,
chainId,
});
if (await useDirect7702Tx(sender)) {
return buildAndSubmitDirect7702Tx({
sender,
callData: sdkCallData,
maxFeePerGas: options.maxFeePerGas,
maxPriorityFeePerGas: options.maxPriorityFeePerGas,
});
}
Iif (!bundlerConfig) {
throw new Error(
'Bundler not configured (required for hybrid smart account redemption)',
);
}
const userOpOptions: {
sender: Address;
callData: Hex;
maxFeePerGas?: Hex;
maxPriorityFeePerGas?: Hex;
} = { sender, callData: sdkCallData };
Eif (options.maxFeePerGas) {
userOpOptions.maxFeePerGas = options.maxFeePerGas;
}
Eif (options.maxPriorityFeePerGas) {
userOpOptions.maxPriorityFeePerGas = options.maxPriorityFeePerGas;
}
return buildAndSubmitUserOp(userOpOptions);
}
/**
* Submit a batch of executions via delegation redemption in a single UserOp.
* Uses `ExecutionMode.BatchDefault` so all executions share the same
* delegation chain.
*
* @param options - Batch delegation options.
* @param options.delegations - The delegation chain (leaf to root).
* @param options.executions - The executions to batch.
* @returns The UserOp hash from the bundler.
*/
async function submitBatchDelegationUserOp(options: {
delegations: Delegation[];
executions: Execution[];
}): Promise<Hex> {
// Check the relay path first — it forwards raw delegations/executions to
// the home wallet and does not need local chain ID or SDK calldata.
if (!bundlerConfig && !smartAccountConfig) {
Eif (peerWallet) {
try {
return await E(peerWallet).handleRedemptionRequest({
type: 'batch',
delegations: options.delegations,
executions: options.executions,
});
} catch (relayError) {
const detail =
relayError instanceof Error
? relayError.message
: String(relayError);
throw new Error(
`Failed to relay batch delegation redemption to home wallet: ${detail}`,
{ cause: relayError },
);
}
}
throw new Error(
'Bundler not configured and no peer wallet available for relay',
);
}
const sender =
smartAccountConfig?.address ?? options.delegations[0]?.delegate;
Iif (!sender) {
throw new Error('No sender address available for batch delegation');
}
const chainId = await resolveChainId();
const sdkCallData = buildSdkBatchRedeemCallData({
delegations: options.delegations,
executions: options.executions,
chainId,
});
if (await useDirect7702Tx(sender)) {
return buildAndSubmitDirect7702Tx({ sender, callData: sdkCallData });
}
Iif (!bundlerConfig) {
throw new Error(
'Bundler not configured (required for hybrid smart account batch redemption)',
);
}
return buildAndSubmitUserOp({ sender, callData: sdkCallData });
}
/**
* Submit a transaction that calls `DelegationManager.disableDelegation` to
* revoke a delegation on-chain — either via a direct EIP-1559 tx (7702) or
* an ERC-4337 UserOp (hybrid).
*
* @param delegation - The delegation to disable.
* @returns The hash and whether the direct 7702 path was used.
*/
async function submitDisableUserOp(
delegation: Delegation,
): Promise<{ hash: Hex; isDirect: boolean }> {
const sender = smartAccountConfig?.address ?? delegation.delegator;
const chainId = await resolveChainId();
const disableCallData = buildSdkDisableCallData({
delegation,
chainId,
});
try {
const isDirect = await useDirect7702Tx(sender);
if (isDirect) {
const hash = await buildAndSubmitDirect7702Tx({
sender,
callData: disableCallData,
});
return { hash, isDirect: true };
}
if (!bundlerConfig) {
throw new Error(
'Bundler not configured (required for hybrid on-chain revocation)',
);
}
const hash = await buildAndSubmitUserOp({
sender,
callData: disableCallData,
});
return { hash, isDirect: false };
} catch (error) {
throw new Error(
`Failed to submit on-chain revocation for delegator ${delegation.delegator}`,
{ cause: error },
);
}
}
/**
* Create a Stateless7702 smart account by signing and broadcasting
* an EIP-7702 authorization transaction. The user's EOA address
* becomes the smart account — no factory deployment or funding needed.
*
* @param chainId - The chain ID.
* @returns The smart account configuration.
*/
async function createStateless7702SmartAccount(
chainId: number,
): Promise<SmartAccountConfig> {
if (!providerVat) {
throw new Error('Provider vat required for EIP-7702 authorization');
}
// Resolve EOA address: keyring first, then external signer.
let eoaAddress: Address;
try {
eoaAddress = await resolveOwnerAddress();
} catch {
throw new Error('No accounts available for EIP-7702 smart account');
}
// Check if already set up (persisted from a prior call)
Iif (
smartAccountConfig?.implementation === 'stateless7702' &&
smartAccountConfig.address === eoaAddress
) {
return smartAccountConfig;
}
// Best-effort on-chain check — works on providers that support
// EIP-7702 designator codes via eth_getCode (not all do, e.g. Infura).
const code = (await E(providerVat).request('eth_getCode', [
eoaAddress,
'latest',
])) as string;
if (isEip7702Delegated(code, chainId)) {
// eslint-disable-next-line require-atomic-updates
smartAccountConfig = harden({
implementation: 'stateless7702' as const,
address: eoaAddress,
deployed: true,
});
persistBaggage('smartAccountConfig', smartAccountConfig);
return smartAccountConfig;
}
// EIP-7702 promotion requires signAuthorization which is only
// available on the local keyring (not supported by external signers).
Iif (!keyringVat || !(await E(keyringVat).hasKeys())) {
throw new Error(
'EIP-7702 promotion requires a local keyring with initialized keys. ' +
'Use implementation: "hybrid", or promote the account through MetaMask first.',
);
}
// Sign EIP-7702 authorization
const env = resolveEnvironment(chainId);
const implAddress = (
env.implementations as Record<string, string | undefined>
).EIP7702StatelessDeleGatorImpl;
Iif (!implAddress) {
throw new Error(
`EIP7702StatelessDeleGatorImpl not found in environment for chain ${String(chainId)}`,
);
}
// Fetch the EOA nonce, gas fees, and sign the authorization in parallel.
// EIP-7702 self-execution: the tx sender is the same EOA as the
// authorization authority. The sender's nonce is incremented by the tx
// validity check BEFORE authorizations are processed, so the
// authorization nonce must be txNonce + 1.
const EIP7702_FALLBACK_GAS = '0x19000' as Hex; // 102400
// Minimum plausible gas for an EIP-7702 auth tx (~40k). Estimates
// below this likely indicate the RPC ignored the authorizationList
// and returned a plain-transfer estimate (21000).
const EIP7702_MIN_GAS = 0xa000n; // 40960
const [nonce, fees, estimatedAuthGas] = await Promise.all([
E(providerVat).getNonce(eoaAddress),
E(providerVat).getGasFees(),
(
E(providerVat).request('eth_estimateGas', [
{
from: eoaAddress,
to: eoaAddress,
authorizationList: [{ address: implAddress, chainId }],
},
]) as Promise<Hex>
).then(
(result) => {
if (typeof result !== 'string' || !result.startsWith('0x')) {
logger.warn(
`eth_estimateGas returned non-hex for EIP-7702 auth: ${String(result)}, using fallback`,
);
return EIP7702_FALLBACK_GAS;
}
Iif (BigInt(result) < EIP7702_MIN_GAS) {
logger.warn(
`eth_estimateGas returned suspiciously low value ${result} for EIP-7702 auth, using fallback`,
);
return EIP7702_FALLBACK_GAS;
}
return result;
},
(error: unknown) => {
const message =
error instanceof Error ? error.message : String(error);
// Only fall back when the RPC doesn't support authorizationList param
Eif (
message.includes('-32602') ||
message.includes('-32601') ||
message.includes('not supported') ||
message.includes('unknown field')
) {
logger.warn(
'eth_estimateGas does not support authorizationList, using fallback gas',
);
return EIP7702_FALLBACK_GAS;
}
throw new Error(
`eth_estimateGas failed for EIP-7702 authorization: ${message}`,
);
},
),
]);
const authGasLimit = applyGasBuffer(estimatedAuthGas, 20);
const signedAuth = await E(keyringVat).signAuthorization({
contractAddress: implAddress as Address,
chainId,
nonce: nonce + 1,
});
const signedTx = await E(keyringVat).signTransaction({
from: eoaAddress,
to: eoaAddress,
chainId,
nonce,
maxFeePerGas: fees.maxFeePerGas,
maxPriorityFeePerGas: fees.maxPriorityFeePerGas,
gasLimit: authGasLimit,
authorizationList: [signedAuth],
});
const txHash = await E(providerVat).broadcastTransaction(signedTx);
// Wait for the authorization tx to be mined. Some RPC providers (e.g.
// Infura) don't expose EIP-7702 designator code via eth_getCode, so we
// poll eth_getTransactionReceipt instead (status 0x1 = success).
Iif (typeof globalThis.setTimeout !== 'function') {
throw new Error(
'EIP-7702 confirmation polling requires setTimeout ' +
'(not available in SES compartments without timer endowments)',
);
}
const maxAttempts = 45;
for (let i = 0; i < maxAttempts; i++) {
const receipt = (await E(providerVat).request(
'eth_getTransactionReceipt',
[txHash],
)) as { status?: string } | null;
if (receipt?.status === '0x1') {
break;
}
Iif (receipt?.status === '0x0') {
throw new Error(
`EIP-7702 authorization tx ${txHash as string} reverted on-chain`,
);
}
if (i === maxAttempts - 1) {
throw new Error(
`EIP-7702 authorization tx ${txHash} not confirmed after 90s`,
);
}
await new Promise((resolve) => setTimeout(resolve, 2000));
}
// eslint-disable-next-line require-atomic-updates
smartAccountConfig = harden({
implementation: 'stateless7702' as const,
address: eoaAddress,
deployed: true,
});
persistBaggage('smartAccountConfig', smartAccountConfig);
return smartAccountConfig;
}
const coordinator = makeDefaultExo('walletCoordinator', {
// ------------------------------------------------------------------
// Lifecycle
// ------------------------------------------------------------------
async bootstrap(vats: WalletVats, services: WalletServices): Promise<void> {
keyringVat = vats.keyring as KeyringFacet | undefined;
providerVat = vats.provider as ProviderFacet | undefined;
delegationVat = vats.delegation as DelegationFacet | undefined;
issuerService = services.ocapURLIssuerService as
| OcapURLIssuerFacet
| undefined;
redemptionService = services.ocapURLRedemptionService as
| OcapURLRedemptionFacet
| undefined;
if (keyringVat) {
persistBaggage('keyringVat', keyringVat);
}
if (providerVat) {
persistBaggage('providerVat', providerVat);
}
if (delegationVat) {
persistBaggage('delegationVat', delegationVat);
}
},
// ------------------------------------------------------------------
// Wallet initialization
// ------------------------------------------------------------------
async initializeKeyring(options: {
type: 'srp' | 'throwaway';
mnemonic?: string;
entropy?: Hex;
password?: string;
salt?: string;
}): Promise<void> {
Iif (!keyringVat) {
throw new Error('Keyring vat not available');
}
const initOptions =
options.type === 'srp'
? { type: 'srp' as const, mnemonic: options.mnemonic ?? '' }
: { type: 'throwaway' as const, entropy: options.entropy };
const password = options.type === 'srp' ? options.password : undefined;
await E(keyringVat).initialize(initOptions, password, options.salt);
},
async unlockKeyring(password: string): Promise<void> {
Iif (!keyringVat) {
throw new Error('Keyring vat not available');
}
await E(keyringVat).unlock(password);
},
async isKeyringLocked(): Promise<boolean> {
Iif (!keyringVat) {
throw new Error('Keyring vat not available');
}
return E(keyringVat).isLocked();
},
async configureProvider(chainConfig: ChainConfig): Promise<void> {
Iif (!providerVat) {
throw new Error('Provider vat not available');
}
// Validate RPC URL (regex — URL constructor unavailable under SES)
if (!/^https?:\/\/.+/u.test(chainConfig.rpcUrl)) {
throw new Error(
`Invalid RPC URL: "${chainConfig.rpcUrl}". Must be a valid HTTP(S) URL.`,
);
}
if (!Number.isInteger(chainConfig.chainId) || chainConfig.chainId <= 0) {
throw new Error(
`Invalid chain ID: ${String(chainConfig.chainId)}. Must be a positive integer.`,
);
}
await E(providerVat).configure(chainConfig);
cachedProviderChainId = chainConfig.chainId;
persistBaggage('cachedProviderChainId', cachedProviderChainId);
},
// ------------------------------------------------------------------
// External signer & bundler configuration
// ------------------------------------------------------------------
async connectExternalSigner(signer: ExternalSignerFacet): Promise<void> {
if (!signer || typeof signer !== 'object') {
throw new Error('Invalid external signer: must be a non-null object');
}
externalSigner = signer;
persistBaggage('externalSigner', externalSigner);
},
async configureBundler(config: {
bundlerUrl: string;
entryPoint?: Hex;
chainId: number;
usePaymaster?: boolean;
sponsorshipPolicyId?: string;
}): Promise<void> {
// Validate bundler URL (regex — URL constructor unavailable under SES)
if (!/^https?:\/\/.+/u.test(config.bundlerUrl)) {
throw new Error(
`Invalid bundler URL: "${config.bundlerUrl}". Must be a valid HTTP(S) URL.`,
);
}
if (!Number.isInteger(config.chainId) || config.chainId <= 0) {
throw new Error(
`Invalid chain ID: ${String(config.chainId)}. Must be a positive integer.`,
);
}
bundlerConfig = harden({
bundlerUrl: config.bundlerUrl,
entryPoint: config.entryPoint ?? ENTRY_POINT_V07,
chainId: config.chainId,
usePaymaster: config.usePaymaster,
sponsorshipPolicyId: config.sponsorshipPolicyId,
});
persistBaggage('bundlerConfig', bundlerConfig);
Iif (!providerVat) {
throw new Error(
'Provider vat not available. Call configureProvider() before configureBundler().',
);
}
await E(providerVat).configureBundler({
bundlerUrl: config.bundlerUrl,
chainId: config.chainId,
});
},
// ------------------------------------------------------------------
// Smart account configuration
// ------------------------------------------------------------------
async createSmartAccount(config: {
deploySalt?: Hex;
chainId: number;
address?: Address;
implementation?: 'hybrid' | 'stateless7702';
}): Promise<SmartAccountConfig> {
const implementation = config.implementation ?? 'hybrid';
if (implementation === 'stateless7702') {
return createStateless7702SmartAccount(config.chainId);
}
// Hybrid path (existing logic)
let { address } = config;
let factory: Address | undefined;
let factoryData: Hex | undefined;
const deploySalt =
config.deploySalt ??
('0x0000000000000000000000000000000000000000000000000000000000000001' as Hex);
// Derive counterfactual address if not explicitly provided
if (!address) {
// Find the owner EOA from keyring or external signer
let owner: Address;
try {
owner = await resolveOwnerAddress();
} catch {
throw new Error(
'No owner account available to derive smart account address',
);
}
const env = resolveEnvironment(config.chainId);
factory = env.SimpleFactory;
const derived = await computeSmartAccountAddress({
owner,
deploySalt,
chainId: config.chainId,
});
address = derived.address;
factoryData = derived.factoryData;
}
smartAccountConfig = harden({
implementation: 'hybrid' as const,
deploySalt,
address,
factory,
factoryData,
deployed: false,
});
persistBaggage('smartAccountConfig', smartAccountConfig);
return smartAccountConfig;
},
async getSmartAccountAddress(): Promise<Address | undefined> {
return smartAccountConfig?.address;
},
// ------------------------------------------------------------------
// Public wallet API
// ------------------------------------------------------------------
async getAccounts(): Promise<Address[]> {
// When a peer wallet is connected, try to fetch live accounts.
// Fall back to cached peer accounts if the peer is unreachable.
if (peerWallet) {
try {
const liveAccounts: Address[] = await raceWithTimeout(
E(peerWallet).getAccounts(),
PEER_TIMEOUT_MS,
);
// Refresh the cache on success
cachedPeerAccounts = liveAccounts;
persistBaggage('cachedPeerAccounts', cachedPeerAccounts);
return liveAccounts;
} catch (error) {
logger.debug('peer getAccounts timed out, using cache', error);
Eif (cachedPeerAccounts.length > 0) {
return cachedPeerAccounts;
}
// No cache — fall through to local accounts
}
}
// Return cached peer accounts if available (peer may have disconnected)
if (cachedPeerAccounts.length > 0) {
return cachedPeerAccounts;
}
const localAccounts: Address[] = keyringVat
? await E(keyringVat).getAccounts()
: [];
const extAccounts: Address[] = externalSigner
? await E(externalSigner).getAccounts()
: [];
// Deduplicate by lowercasing
const seen = new Set(localAccounts.map((a) => a.toLowerCase()));
const merged = [...localAccounts];
for (const account of extAccounts) {
if (!seen.has(account.toLowerCase())) {
seen.add(account.toLowerCase());
merged.push(account);
}
}
return merged;
},
async signTransaction(tx: TransactionRequest): Promise<Hex> {
return resolveTransactionSigning(tx);
},
async sendTransaction(tx: TransactionRequest): Promise<Hex> {
Iif (!providerVat) {
throw new Error('Provider not configured');
}
// Enforce delegations whenever the delegation vat exists (bundler optional
// for 7702). Delegations are a security boundary — if we cannot resolve the
// chain ID we must fail rather than silently bypassing caveat enforcement.
if (delegationVat) {
const walletChainId = await resolveChainId();
const action: Action = {
to: tx.to,
value: tx.value,
data: tx.data,
};
const now = Date.now();
const delegation = await E(delegationVat).findDelegationForAction(
action,
walletChainId,
now,
);
if (delegation) {
Iif (delegation.status !== 'signed') {
throw new Error(
`Found delegation ${delegation.id} but its status is '${delegation.status}' (expected 'signed'). ` +
`Direct signing is not used when a delegation exists, to avoid bypassing caveats.`,
);
}
return submitDelegationUserOp({
delegations: [delegation],
execution: {
target: tx.to,
value: tx.value ?? ('0x0' as Hex),
callData: tx.data ?? ('0x' as Hex),
},
maxFeePerGas: tx.maxFeePerGas,
maxPriorityFeePerGas: tx.maxPriorityFeePerGas,
});
}
// No delegation matched — explain why before falling through
const explanations = await E(delegationVat).explainActionMatch(
action,
walletChainId,
now,
);
if (explanations.length > 0) {
const valueDesc = tx.value
? `${BigInt(tx.value)} wei (${Number(BigInt(tx.value)) / 1e18} ETH)`
: 'no value';
throw new Error(
buildDelegationMismatchError(
explanations,
`No delegation covers this transaction (to: ${tx.to}, value: ${valueDesc})`,
),
);
}
}
// Estimate missing gas fields for direct (non-delegation) sends
const filledTx = { ...tx };
filledTx.nonce ??= await E(providerVat).getNonce(filledTx.from);
filledTx.chainId ??= await E(providerVat).getChainId();
if (!filledTx.maxFeePerGas || !filledTx.maxPriorityFeePerGas) {
const fees = await E(providerVat).getGasFees();
filledTx.maxFeePerGas ??= fees.maxFeePerGas;
filledTx.maxPriorityFeePerGas ??= fees.maxPriorityFeePerGas;
}
filledTx.gasLimit ??= applyGasBuffer(
validateGasEstimate(
await E(providerVat).request('eth_estimateGas', [
{
from: filledTx.from,
to: filledTx.to,
value: filledTx.value,
data: filledTx.data,
},
]),
),
10,
);
const signedTx = await resolveTransactionSigning(filledTx);
return E(providerVat).broadcastTransaction(signedTx);
},
async sendBatchTransaction(
txs: TransactionRequest[],
): Promise<Hex | Hex[]> {
if (txs.length === 0) {
throw new Error('No transactions to send');
}
if (txs.length === 1) {
return coordinator.sendTransaction(txs[0]);
}
Iif (!providerVat) {
throw new Error('Provider not configured');
}
const batchSender =
smartAccountConfig?.address ?? (await coordinator.getAccounts())[0];
// Cache the predicate result — useDirect7702Tx is impure (eth_getCode)
// and must not be called twice for the same sender (see revokeDelegation).
const isDirect7702Batch =
batchSender !== undefined &&
smartAccountConfig?.implementation === 'stateless7702' &&
(await useDirect7702Tx(batchSender));
const useSmartAccountBatchPath =
bundlerConfig !== undefined ||
isDirect7702Batch ||
(peerWallet !== undefined && delegationVat !== undefined);
// Smart account path: single UserOp or direct 7702 self-call
if (useSmartAccountBatchPath) {
const executions: Execution[] = txs.map((tx) => ({
target: tx.to,
value: tx.value ?? ('0x0' as Hex),
callData: tx.data ?? ('0x' as Hex),
}));
const walletChainId = await resolveChainId();
// Delegation path: batch via redeemDelegations with BatchDefault mode.
// Validate that the delegation covers ALL actions in the batch,
// not just the first one, to avoid on-chain reverts.
Eif (delegationVat) {
const now = Date.now();
const actions: Action[] = txs.map((tx) => ({
to: tx.to,
value: tx.value,
data: tx.data,
}));
let delegation: Delegation | undefined;
for (const action of actions) {
const found = await E(delegationVat).findDelegationForAction(
action,
walletChainId,
now,
);
if (!found || found.status !== 'signed') {
delegation = undefined;
break;
}
// All actions must be covered by the same delegation.
Iif (delegation && delegation.id !== found.id) {
delegation = undefined;
break;
}
delegation = found;
}
if (delegation) {
return submitBatchDelegationUserOp({
delegations: [delegation],
executions,
});
}
// No single delegation covers all batch actions — check whether
// delegations exist that partially match. If so, block the batch
// (same enforcement as sendTransaction) to prevent bypassing caveats
// via the direct execute path.
for (const action of actions) {
const explanations = await E(delegationVat).explainActionMatch(
action,
walletChainId,
now,
);
if (explanations.length > 0) {
throw new Error(
buildDelegationMismatchError(
explanations,
`No single delegation covers all ${String(actions.length)} batch actions`,
),
);
}
}
}
// Direct smart account batch (no delegation)
const sender = batchSender;
Iif (!sender) {
throw new Error('No accounts available for batch');
}
const callData = buildBatchExecuteCallData({ executions });
if (isDirect7702Batch) {
return buildAndSubmitDirect7702Tx({ sender, callData });
}
if (!bundlerConfig) {
throw new Error(
'Non-delegation batch execution requires a bundler or direct 7702; ' +
'peer relay is only available for delegation redemptions',
);
}
return buildAndSubmitUserOp({ sender, callData });
}
// EOA fallback: execute sequentially
const hashes: Hex[] = [];
for (const tx of txs) {
hashes.push(await coordinator.sendTransaction(tx));
}
return hashes;
},
async signTypedData(data: Eip712TypedData, from?: Address): Promise<Hex> {
return resolveTypedDataSigning(data, from);
},
async signMessage(message: string, account?: Address): Promise<Hex> {
return resolveMessageSigning(message, account);
},
async request(method: string, params?: unknown[]): Promise<unknown> {
if (!providerVat) {
throw new Error('Provider not configured');
}
return E(providerVat).request(method, params);
},
/**
* Look up a transaction by hash. Tries the bundler first (in case the
* hash is a UserOp hash from delegation redemption), then falls back
* to a regular `eth_getTransactionReceipt` RPC call.
*
* @param hash - A UserOp hash or regular tx hash.
* @returns An object with `txHash` and `receipt`, or null if not found.
*/
async getTransactionReceipt(hash: Hex): Promise<{
txHash: Hex;
userOpHash?: Hex;
success: boolean;
} | null> {
if (!providerVat) {
throw new Error('Provider not configured');
}
// Try bundler first (UserOp hash)
if (bundlerConfig) {
try {
const userOpReceipt = (await E(providerVat).getUserOpReceipt({
bundlerUrl: bundlerConfig.bundlerUrl,
userOpHash: hash,
})) as {
success: boolean;
receipt?: { transactionHash?: string };
} | null;
if (userOpReceipt?.receipt?.transactionHash) {
return harden({
txHash: userOpReceipt.receipt.transactionHash as Hex,
userOpHash: hash,
success: userOpReceipt.success,
});
}
} catch (error) {
// Not a UserOp hash — fall through to regular RPC
logger.debug(
'UserOp receipt lookup failed, trying regular RPC',
error,
);
}
}
// Try regular tx receipt
const receipt = (await E(providerVat).request(
'eth_getTransactionReceipt',
[hash],
)) as { status?: string; transactionHash?: string } | null;
if (receipt?.transactionHash) {
return harden({
txHash: receipt.transactionHash as Hex,
success: receipt.status === '0x1',
});
}
return null;
},
// ------------------------------------------------------------------
// Delegation management
// ------------------------------------------------------------------
async createDelegation(opts: CreateDelegationOptions): Promise<Delegation> {
Iif (!delegationVat) {
throw new Error('Delegation vat not available');
}
// Determine delegator and signing function.
// When a smart account is configured, use its address as delegator
// but sign with the underlying EOA key (the smart account's owner).
let delegator: Address | undefined;
let signTypedDataFn:
| ((data: Eip712TypedData) => Promise<Hex>)
| undefined;
if (keyringVat) {
const accounts = await E(keyringVat).getAccounts();
Eif (accounts.length > 0) {
delegator = smartAccountConfig?.address ?? accounts[0];
const kv = keyringVat;
signTypedDataFn = async (data: Eip712TypedData) =>
E(kv).signTypedData(data);
}
}
if (!delegator && externalSigner) {
const accounts = await E(externalSigner).getAccounts();
Eif (accounts.length > 0) {
delegator = smartAccountConfig?.address ?? accounts[0];
const ext = externalSigner;
// Smart-account delegations are signed by the owner EOA, not the
// smart-account address used as delegator in typed data.
const from = accounts[0];
signTypedDataFn = async (data: Eip712TypedData) =>
E(ext).signTypedData(data, from);
}
}
if (!delegator || !signTypedDataFn) {
throw new Error('No accounts available to create delegation');
}
const delegation = await E(delegationVat).createDelegation({
...opts,
delegator,
});
const typedData = await E(delegationVat).prepareDelegationForSigning(
delegation.id,
);
const signature = await signTypedDataFn(typedData);
await E(delegationVat).storeSigned(delegation.id, signature);
return E(delegationVat).getDelegation(delegation.id);
},
async receiveDelegation(delegation: Delegation): Promise<void> {
if (!delegationVat) {
throw new Error('Delegation vat not available');
}
await E(delegationVat).receiveDelegation(delegation);
},
/**
* Mark a delegation as revoked in the local store without submitting
* an on-chain transaction. Used by the home device to propagate
* revocations to the away device over CapTP.
*
* @param id - The delegation identifier.
*/
async revokeDelegationLocally(id: string): Promise<void> {
Iif (!delegationVat) {
throw new Error('Delegation vat not available');
}
// Silently ignore if the delegation doesn't exist locally
// (the away device may not have received it yet).
try {
const delegation = await E(delegationVat).getDelegation(id);
if (delegation.status !== 'revoked') {
await E(delegationVat).revokeDelegation(id);
}
} catch (error) {
// Delegation not found locally — nothing to revoke.
logger.debug('revokeDelegationLocally: delegation not found', error);
}
},
/**
* Revoke a delegation on-chain by calling `DelegationManager.disableDelegation`
* via a UserOp (hybrid) or a direct EIP-1559 transaction (stateless 7702).
* Blocks until the transaction is confirmed on-chain, then updates the local
* delegation status.
*
* Hybrid accounts require a configured bundler (paymaster optional).
*
* @param id - The delegation identifier.
* @returns The UserOp hash or transaction hash of the on-chain revocation.
*/
async revokeDelegation(id: string): Promise<Hex> {
if (!delegationVat) {
throw new Error('Delegation vat not available');
}
const delegation = await E(delegationVat).getDelegation(id);
if (delegation.status === 'revoked') {
throw new Error(`Delegation ${id} is already revoked`);
}
Iif (delegation.status !== 'signed') {
throw new Error(
`Delegation ${id} has status '${delegation.status}', expected 'signed'`,
);
}
// Verify this wallet controls the delegator address
const accounts = await coordinator.getAccounts();
const delegatorLower = delegation.delegator.toLowerCase();
const smartAccountLower = smartAccountConfig?.address?.toLowerCase();
const matchesAccount = accounts.some(
(a: string) => a.toLowerCase() === delegatorLower,
);
const isOwned = matchesAccount
? true
: smartAccountLower === delegatorLower;
Iif (!isOwned) {
throw new Error(
`Cannot revoke delegation ${id}: delegator ${delegation.delegator} is not controlled by this wallet`,
);
}
// Submit on-chain disable — returns the hash and which path was used
// so we poll the right receipt endpoint without calling useDirect7702Tx
// a second time (the predicate is impure due to eth_getCode).
const { hash: submissionHash, isDirect } =
await submitDisableUserOp(delegation);
if (isDirect) {
const receipt = await pollTransactionReceipt({
txHash: submissionHash,
});
if (!receipt.success) {
throw new Error(
`On-chain revocation reverted for delegation ${id} (tx: ${submissionHash})`,
);
}
} else {
// waitForUserOpReceipt either returns a non-null receipt or throws
// on timeout — validate the shape to catch unexpected bundler responses.
const rawReceipt = await coordinator.waitForUserOpReceipt({
userOpHash: submissionHash,
});
const receipt = rawReceipt as { success?: boolean } | undefined;
Iif (
!receipt ||
typeof receipt !== 'object' ||
!('success' in receipt)
) {
throw new Error(
`Unexpected UserOp receipt format for delegation ${id} ` +
`(userOpHash: ${submissionHash})`,
);
}
if (!receipt.success) {
throw new Error(
`On-chain revocation reverted for delegation ${id} (userOpHash: ${submissionHash})`,
);
}
}
// Update local status after on-chain confirmation
await E(delegationVat).revokeDelegation(id);
return submissionHash;
},
async listDelegations(): Promise<Delegation[]> {
Iif (!delegationVat) {
throw new Error('Delegation vat not available');
}
return E(delegationVat).listDelegations();
},
// ------------------------------------------------------------------
// Delegation redemption (ERC-4337)
// ------------------------------------------------------------------
async redeemDelegation(options: {
execution: Execution;
delegations?: Delegation[];
delegationId?: string;
action?: Action;
maxFeePerGas?: Hex;
maxPriorityFeePerGas?: Hex;
}): Promise<Hex> {
Iif (!delegationVat) {
throw new Error('Delegation vat not available');
}
// Resolve the delegation chain
let delegations: Delegation[];
if (options.delegations && options.delegations.length > 0) {
// Explicit delegation chain provided
delegations = options.delegations;
} else if (options.delegationId) {
const delegation = await E(delegationVat).getDelegation(
options.delegationId,
);
delegations = [delegation];
} else if (options.action) {
// Only resolve chain ID when needed for delegation matching
const walletChainId = await resolveChainId();
const now = Date.now();
const delegation = await E(delegationVat).findDelegationForAction(
options.action,
walletChainId,
now,
);
if (!delegation) {
const explanations = await E(delegationVat).explainActionMatch(
options.action,
walletChainId,
now,
);
throw new Error(
buildDelegationMismatchError(
explanations,
'No matching delegation found',
),
);
}
delegations = [delegation];
} else {
throw new Error('Must provide delegations, delegationId, or action');
}
// Validate all delegations in the chain are signed
for (const delegation of delegations) {
if (delegation.status !== 'signed') {
throw new Error(
`Delegation ${delegation.id} has status '${delegation.status}', expected 'signed'`,
);
}
}
return submitDelegationUserOp({
delegations,
execution: options.execution,
maxFeePerGas: options.maxFeePerGas,
maxPriorityFeePerGas: options.maxPriorityFeePerGas,
});
},
// ------------------------------------------------------------------
// ERC-20 token utilities
// ------------------------------------------------------------------
async getTokenBalance(options: {
token: Address;
owner: Address;
}): Promise<string> {
if (!providerVat) {
throw new Error('Provider not configured');
}
const callData = encodeBalanceOf(options.owner);
const result = await E(providerVat).request('eth_call', [
{ to: options.token, data: callData },
'latest',
]);
const validated = validateTokenCallResult(
result,
'balanceOf',
options.token,
);
return decodeBalanceOfResult(validated).toString();
},
async getTokenMetadata(options: {
token: Address;
}): Promise<{ name: string; symbol: string; decimals: number }> {
if (!providerVat) {
throw new Error('Provider not configured');
}
const [nameSettled, symbolSettled, decimalsSettled] =
await Promise.allSettled([
E(providerVat).request('eth_call', [
{ to: options.token, data: encodeName() },
'latest',
]),
E(providerVat).request('eth_call', [
{ to: options.token, data: encodeSymbol() },
'latest',
]),
E(providerVat).request('eth_call', [
{ to: options.token, data: encodeDecimals() },
'latest',
]),
]);
// decimals is mandatory — wrong decimals causes financial errors
Iif (decimalsSettled.status === 'rejected') {
throw new Error(
`decimals() call failed for token ${options.token}: ${
decimalsSettled.reason instanceof Error
? decimalsSettled.reason.message
: String(decimalsSettled.reason)
}`,
);
}
// name and symbol are optional in ERC-20; fall back gracefully
let name = 'Unknown';
Eif (nameSettled.status === 'fulfilled') {
try {
name = decodeNameResult(
validateTokenCallResult(nameSettled.value, 'name', options.token),
);
} catch {
// name() not implemented or returned invalid data
}
}
let symbol = 'Unknown';
Eif (symbolSettled.status === 'fulfilled') {
try {
symbol = decodeSymbolResult(
validateTokenCallResult(
symbolSettled.value,
'symbol',
options.token,
),
);
} catch {
// symbol() not implemented or returned invalid data
}
}
return harden({
name,
symbol,
decimals: decodeDecimalsResult(
validateTokenCallResult(
decimalsSettled.value,
'decimals',
options.token,
),
),
});
},
async sendErc20Transfer(options: {
token: Address;
to: Address;
amount: bigint | Hex;
from?: Address;
}): Promise<Hex> {
const accounts = await coordinator.getAccounts();
const from = options.from ?? accounts[0];
if (!from) {
throw new Error('No accounts available');
}
const rawAmount =
typeof options.amount === 'bigint'
? options.amount
: BigInt(options.amount);
const callData = encodeTransfer(options.to, rawAmount);
return coordinator.sendTransaction({
from,
to: options.token,
data: callData,
value: '0x0' as Hex,
});
},
// ------------------------------------------------------------------
// Token swaps (MetaSwap API)
// ------------------------------------------------------------------
async getSwapQuote(options: {
srcToken: Address;
destToken: Address;
srcAmount: Hex;
slippage: number;
walletAddress?: Address;
}): Promise<SwapQuote> {
if (!providerVat) {
throw new Error('Provider not configured');
}
if (options.slippage < 0.1 || options.slippage > 50) {
throw new Error('Slippage must be between 0.1 and 50');
}
const walletAddress =
options.walletAddress ?? (await coordinator.getAccounts())[0];
Iif (!walletAddress) {
throw new Error('No accounts available');
}
const chainId = await resolveChainId();
const rawAmount = BigInt(options.srcAmount).toString();
// Build query string manually — URLSearchParams is unavailable in SES vats.
const queryEntries: [string, string][] = [
['sourceToken', options.srcToken.toLowerCase()],
['destinationToken', options.destToken.toLowerCase()],
['sourceAmount', rawAmount],
['slippage', String(options.slippage)],
['walletAddress', walletAddress],
['timeout', '10000'],
];
const query = queryEntries
.map(
([key, val]) =>
`${encodeURIComponent(key)}=${encodeURIComponent(val)}`,
)
.join('&');
const url = `https://swap.api.cx.metamask.io/networks/${String(chainId)}/trades?${query}`;
const response = await E(providerVat).httpGetJson(url);
if (!Array.isArray(response) || response.length === 0) {
throw new Error(
'No swap quotes available for this token pair and amount',
);
}
// Select the best quote by highest destinationAmount
let best: SwapQuote | undefined;
let bestAmount = -1n;
for (const entry of response) {
const quote = entry as Record<string, unknown>;
if (quote.error) {
continue;
}
const rawDest =
typeof quote.destinationAmount === 'string'
? quote.destinationAmount
: '0';
const destAmount = BigInt(rawDest);
if (destAmount > bestAmount) {
bestAmount = destAmount;
best = quote as unknown as SwapQuote;
}
}
if (!best) {
throw new Error(
'All swap aggregators returned errors. Try a different amount or token pair.',
);
}
return harden(best);
},
async swapTokens(options: {
srcToken: Address;
destToken: Address;
srcAmount: Hex;
slippage: number;
}): Promise<SwapResult> {
const ZERO_ADDRESS =
'0x0000000000000000000000000000000000000000' as Address;
const accounts = await coordinator.getAccounts();
const from = accounts[0];
Iif (!from) {
throw new Error('No accounts available');
}
// Fetch a fresh quote at execution time, reusing the resolved account
const quote = await coordinator.getSwapQuote({
...options,
walletAddress: from,
});
// Determine if approval is needed
const needsApproval =
quote.approvalNeeded !== null &&
options.srcToken.toLowerCase() !== ZERO_ADDRESS;
const approvalInfo = needsApproval ? quote.approvalNeeded : null;
let approvalNeeded = false;
if (approvalInfo) {
Iif (!providerVat) {
throw new Error('Provider not configured');
}
const spender = approvalInfo.to as Address;
const allowanceCallData = encodeAllowance(from, spender);
const allowanceResult = await E(providerVat).request('eth_call', [
{ to: options.srcToken, data: allowanceCallData },
'latest',
]);
const currentAllowance =
typeof allowanceResult === 'string' && allowanceResult !== '0x'
? decodeAllowanceResult(allowanceResult as Hex)
: 0n;
approvalNeeded = currentAllowance < BigInt(options.srcAmount);
}
const swapTx: TransactionRequest = {
from,
to: quote.trade.to as Address,
data: quote.trade.data as Hex,
value: (quote.trade.value ?? '0x0') as Hex,
};
// Batch path: combine approve + swap in a single UserOp when
// the bundler is configured (smart account).
if (approvalNeeded && approvalInfo && bundlerConfig) {
const approvalTx: TransactionRequest = {
from,
to: options.srcToken,
data: approvalInfo.data as Hex,
value: (approvalInfo.value ?? '0x0') as Hex,
};
const batchResult = await coordinator.sendBatchTransaction([
approvalTx,
swapTx,
]);
// sendBatchTransaction returns a single Hex for batched UserOps
const batchHash = Array.isArray(batchResult)
? (batchResult[0] as Hex)
: batchResult;
return harden({
approvalTxHash: undefined,
swapTxHash: batchHash,
sourceAmount: quote.sourceAmount,
destinationAmount: quote.destinationAmount,
aggregator: quote.aggregator,
batched: true,
});
}
// Sequential path: approve then swap (EOA or no approval needed)
let approvalTxHash: Hex | undefined;
if (approvalNeeded && approvalInfo) {
approvalTxHash = await coordinator.sendTransaction({
from,
to: options.srcToken,
data: approvalInfo.data as Hex,
value: (approvalInfo.value ?? '0x0') as Hex,
});
}
try {
const swapTxHash = await coordinator.sendTransaction(swapTx);
return harden({
approvalTxHash,
swapTxHash,
sourceAmount: quote.sourceAmount,
destinationAmount: quote.destinationAmount,
aggregator: quote.aggregator,
});
} catch (error: unknown) {
Eif (approvalTxHash) {
const message =
error instanceof Error ? error.message : String(error);
throw new Error(
`Swap transaction failed after approval was sent (approval tx: ${approvalTxHash}). ` +
`The token allowance was set but the swap did not complete: ${message}`,
);
}
throw error;
}
},
async waitForUserOpReceipt(options: {
userOpHash: Hex;
pollIntervalMs?: number;
timeoutMs?: number;
}): Promise<unknown> {
if (!providerVat || !bundlerConfig) {
throw new Error('Provider and bundler must be configured');
}
Iif (
typeof globalThis.Date?.now !== 'function' ||
typeof globalThis.setTimeout !== 'function'
) {
throw new Error(
'waitForUserOpReceipt requires Date.now and setTimeout ' +
'(not available in SES compartments without timer endowments)',
);
}
const interval = options.pollIntervalMs ?? 2000;
const timeout = options.timeoutMs ?? 60000;
const start = Date.now();
while (Date.now() - start < timeout) {
const receipt = await E(providerVat).getUserOpReceipt({
bundlerUrl: bundlerConfig.bundlerUrl,
userOpHash: options.userOpHash,
});
if (receipt !== null) {
return receipt;
}
await new Promise((resolve) => setTimeout(resolve, interval));
}
throw new Error(
`UserOp ${options.userOpHash} not found after ${timeout}ms`,
);
},
/**
* Poll until a regular EIP-1559 transaction is mined (e.g. stateless 7702
* direct sends). Prefer `waitForUserOpReceipt` for ERC-4337 UserOp hashes.
*
* @param options - Polling options.
* @param options.txHash - Transaction hash to wait for.
* @param options.pollIntervalMs - Delay between RPC polls in milliseconds.
* @param options.timeoutMs - Maximum time to wait in milliseconds.
* @returns Whether the mined transaction succeeded (`status` 0x1).
*/
async waitForTransactionReceipt(options: {
txHash: Hex;
pollIntervalMs?: number;
timeoutMs?: number;
}): Promise<{ success: boolean }> {
return pollTransactionReceipt(options);
},
// ------------------------------------------------------------------
// Peer wallet connectivity
// ------------------------------------------------------------------
async issueOcapUrl(): Promise<string> {
if (!issuerService) {
throw new Error('OCAP URL issuer service not available');
}
return E(issuerService).issue(coordinator);
},
async connectToPeer(ocapUrl: string): Promise<void> {
Iif (!redemptionService) {
throw new Error('OCAP URL redemption service not available');
}
peerWallet = (await E(redemptionService).redeem(
ocapUrl,
)) as PeerWalletFacet;
persistBaggage('peerWallet', peerWallet);
// Cache the peer accounts for offline autonomy
try {
cachedPeerAccounts = await E(peerWallet).getAccounts();
persistBaggage('cachedPeerAccounts', cachedPeerAccounts);
} catch (error) {
// Peer may not be ready yet; accounts can be cached later
// via refreshPeerAccounts()
logger.warn('peer account fetch failed during connect', error);
}
// Register this coordinator as the away wallet on the home device
// so the home can push delegations directly over CapTP.
try {
await E(peerWallet).registerAwayWallet(coordinator);
} catch (error) {
// Home device may not support registerAwayWallet yet (older version).
// Delegation transfer falls back to copy-paste.
logger.warn('registerAwayWallet failed', error);
}
},
async refreshPeerAccounts(): Promise<Address[]> {
if (!peerWallet) {
throw new Error('No peer wallet connected');
}
cachedPeerAccounts = await E(peerWallet).getAccounts();
persistBaggage('cachedPeerAccounts', cachedPeerAccounts);
return cachedPeerAccounts;
},
async registerAwayWallet(awayRef: unknown): Promise<void> {
if (!awayRef || typeof awayRef !== 'object') {
throw new Error(
'Invalid away wallet reference: must be a non-null object',
);
}
awayWallet = awayRef as AwayWalletFacet;
persistBaggage('awayWallet', awayWallet);
},
async pushDelegationToAway(
delegation: Delegation,
revokeIds?: string[],
): Promise<void> {
if (!awayWallet) {
throw new Error(
'No away wallet registered. The away device must connect first.',
);
}
// Revoke old delegations on the away device first so it stops using them
Iif (revokeIds && revokeIds.length > 0) {
for (const id of revokeIds) {
await E(awayWallet).revokeDelegationLocally(id);
}
}
await E(awayWallet).receiveDelegation(delegation);
},
async registerDelegateAddress(address: string): Promise<void> {
if (
!address ||
typeof address !== 'string' ||
!/^0x[\da-f]{40}$/iu.test(address)
) {
throw new Error(
'Invalid delegate address: must be a 0x-prefixed 40-hex-char string',
);
}
pendingDelegateAddress = address as Address;
persistBaggage('pendingDelegateAddress', pendingDelegateAddress);
},
async getDelegateAddress(): Promise<Address | undefined> {
return pendingDelegateAddress;
},
async sendDelegateAddressToPeer(address: string): Promise<void> {
if (!peerWallet) {
throw new Error('No peer wallet connected');
}
await E(peerWallet).registerDelegateAddress(address);
},
async handleSigningRequest(request: {
type: string;
tx?: TransactionRequest;
data?: Eip712TypedData;
message?: string;
account?: Address;
}): Promise<Hex> {
switch (request.type) {
case 'transaction':
Iif (!request.tx) {
throw new Error('Missing transaction in signing request');
}
throw new Error(
'Peer transaction signing is disabled; use delegation redemption',
);
case 'typedData':
Iif (!request.data) {
throw new Error('Missing typed data in signing request');
}
Iif (keyringVat) {
const hasKeys = await E(keyringVat).hasKeys();
if (hasKeys) {
return E(keyringVat).signTypedData(request.data, request.account);
}
}
if (externalSigner) {
const accounts = await E(externalSigner).getAccounts();
Eif (accounts.length > 0) {
return E(externalSigner).signTypedData(
request.data,
request.account ?? accounts[0],
);
}
}
throw new Error('No signer available to handle signing request');
case 'message':
Iif (!request.message) {
throw new Error('Missing message in signing request');
}
if (keyringVat) {
const hasKeys = await E(keyringVat).hasKeys();
Eif (hasKeys) {
return E(keyringVat).signMessage(
request.message,
request.account,
);
}
}
Eif (externalSigner) {
const accounts = await E(externalSigner).getAccounts();
Eif (accounts.length > 0) {
return E(externalSigner).signMessage(
request.message,
request.account ?? accounts[0],
);
}
}
throw new Error('No signer available to handle signing request');
default:
throw new Error(`Unknown signing request type: ${request.type}`);
}
},
// ------------------------------------------------------------------
// Peer delegation redemption relay
// ------------------------------------------------------------------
async handleRedemptionRequest(request: {
type: 'single' | 'batch';
delegations: Delegation[];
execution?: Execution;
executions?: Execution[];
maxFeePerGas?: Hex;
maxPriorityFeePerGas?: Hex;
}): Promise<Hex> {
if (!request.delegations || request.delegations.length === 0) {
throw new Error('Missing or empty delegations in redemption request');
}
// Guard against infinite relay loops: if this wallet cannot fulfill
// the request locally, it must not relay it back to its own peer.
// Uses the same config-based check as the relay entry condition in
// submitDelegationUserOp/submitBatchDelegationUserOp — keep in sync.
const canFulfillLocally =
bundlerConfig !== undefined ||
(smartAccountConfig?.implementation === 'stateless7702' &&
providerVat !== undefined);
if (!canFulfillLocally) {
throw new Error(
'Cannot fulfill relayed redemption: no bundler or direct 7702 configured',
);
}
if (request.type === 'single') {
if (!request.execution) {
throw new Error('Missing execution in single redemption request');
}
return submitDelegationUserOp({
delegations: request.delegations,
execution: request.execution,
maxFeePerGas: request.maxFeePerGas,
maxPriorityFeePerGas: request.maxPriorityFeePerGas,
});
}
if (request.type === 'batch') {
if (!request.executions || request.executions.length === 0) {
throw new Error('Missing executions in batch redemption request');
}
return submitBatchDelegationUserOp({
delegations: request.delegations,
executions: request.executions,
});
}
throw new Error(
`Unknown redemption request type: ${String(request.type)}`,
);
},
// ------------------------------------------------------------------
// Introspection
// ------------------------------------------------------------------
async getCapabilities(): Promise<WalletCapabilities> {
const hasLocalKeys = keyringVat ? await E(keyringVat).hasKeys() : false;
const localAccounts: Address[] = keyringVat
? await E(keyringVat).getAccounts()
: [];
const allDelegations: Delegation[] = delegationVat
? await E(delegationVat).listDelegations()
: [];
const activeDelegations = allDelegations.filter(
(del) => del.status === 'signed',
);
// Resolve the signing mode so consumers (including AI agents) know
// how signing works and whether user approval is needed.
// Peer wallet takes priority — when present, it is the actual signing
// authority (the local throwaway key is an implementation detail).
let signingMode: string = 'none';
if (peerWallet) {
try {
const peerCaps = await raceWithTimeout(
E(peerWallet).getCapabilities(),
PEER_TIMEOUT_MS,
);
signingMode = `peer:${peerCaps.signingMode ?? 'unknown'}`;
cachedPeerSigningMode = signingMode;
persistBaggage('cachedPeerSigningMode', cachedPeerSigningMode);
} catch (error) {
logger.warn('peer getCapabilities failed, using cache', error);
signingMode = cachedPeerSigningMode ?? 'peer:unknown';
}
} else if (externalSigner) {
signingMode = 'external:metamask';
} else if (hasLocalKeys) {
signingMode = 'local';
}
// Build human-readable delegation summaries so AI agents understand
// what they can do autonomously without further user approval.
const delegationInfos = activeDelegations.map((del) => ({
id: del.id,
delegator: del.delegator,
delegate: del.delegate,
caveats: del.caveats.map((cav) => ({
type: cav.type,
humanReadable: describeCaveat(cav),
})),
}));
// Determine the agent's autonomy level based on delegations.
// When delegations exist, the agent can send ETH within the
// delegation's limits without requiring further user approval.
// Stateless 7702 can redeem via direct RPC without a bundler.
// Peer relay can redeem but requires the home wallet to be online.
let autonomy: string;
const canRedeemLocally =
bundlerConfig !== undefined ||
(smartAccountConfig?.implementation === 'stateless7702' &&
providerVat !== undefined);
// Relay requires no smartAccountConfig — mirrors the entry condition
// in submitDelegationUserOp/submitBatchDelegationUserOp.
const canRedeemViaRelay =
!canRedeemLocally && !smartAccountConfig && peerWallet !== undefined;
const canRedeemDelegationsOnChain =
activeDelegations.length > 0 && (canRedeemLocally || canRedeemViaRelay);
if (canRedeemDelegationsOnChain) {
const limits = activeDelegations
.flatMap((del) => del.caveats)
.map(describeCaveat)
.filter(Boolean);
const base =
limits.length > 0
? `autonomous within limits: ${limits.join('; ')}`
: 'autonomous (no spending limits)';
if (canRedeemViaRelay) {
autonomy = `${base} (relay, requires home online)`;
} else {
autonomy =
cachedPeerAccounts.length > 0 ? `${base} (offline-capable)` : base;
}
I} else if (peerWallet) {
autonomy = 'requires peer wallet approval for each action';
} else {
autonomy = 'no signing authority';
}
let capabilityChainId: number | undefined;
try {
capabilityChainId = await resolveChainId();
} catch (error) {
logger.warn('Failed to resolve chain ID for capabilities', error);
}
return harden({
hasLocalKeys,
localAccounts,
delegationCount: activeDelegations.length,
delegations: delegationInfos,
hasPeerWallet: peerWallet !== undefined,
hasExternalSigner: externalSigner !== undefined,
hasBundlerConfig: bundlerConfig !== undefined,
smartAccountAddress: smartAccountConfig?.address,
chainId: capabilityChainId,
signingMode,
autonomy,
peerAccountsCached: cachedPeerAccounts.length > 0,
cachedPeerAccounts,
hasAwayWallet: awayWallet !== undefined,
});
},
});
return coordinator;
}
|