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import { makeDefaultExo } from '@metamask/kernel-utils/exo';
import { Logger } from '@metamask/logger';
import type { Baggage } from '@metamask/ocap-kernel';
import type { DelegationSection } from '../lib/delegation-twin.ts';
import { makeDelegationTwin } from '../lib/delegation-twin.ts';
import {
decodeBalanceOfResult,
decodeDecimalsResult,
decodeNameResult,
decodeSymbolResult,
encodeBalanceOf,
encodeDecimals,
encodeName,
encodeSymbol,
} from '../lib/erc20.ts';
import {
registerEnvironment,
resolveEnvironment,
buildSdkRedeemCallData,
isEip7702Delegated,
prepareUserOpTypedData,
setSdkLogger,
computeSmartAccountAddress,
} from '../lib/sdk.ts';
import {
applyGasBuffer,
validateGasEstimate,
validateTokenCallResult,
} from '../lib/tx-utils.ts';
import { ENTRY_POINT_V07 } from '../lib/userop.ts';
import type {
Address,
ChainConfig,
Delegation,
DelegationGrant,
Eip712TypedData,
Execution,
Hex,
SmartAccountConfig,
TransactionRequest,
UserOperation,
WalletCapabilities,
} from '../types.ts';
const harden = globalThis.harden ?? (<T>(value: T): T => value);
/**
* 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`;
}
// ---------------------------------------------------------------------------
// Vat powers and wiring types
// ---------------------------------------------------------------------------
/**
* Vat powers for the away coordinator vat.
*/
type VatPowers = {
logger?: Logger;
};
/**
* Vat references available in the away wallet subcluster.
*/
type WalletVats = {
keyring?: unknown;
provider?: unknown;
redeemer?: unknown;
};
/**
* Services available to the away wallet subcluster.
*/
type WalletServices = {
ocapURLRedemptionService?: unknown;
};
// ---------------------------------------------------------------------------
// Typed facets for E() calls (no `any` — 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 ExternalSignerFacet = {
getAccounts: () => Promise<Address[]>;
signTypedData: (data: Eip712TypedData, from: Address) => Promise<Hex>;
signMessage: (message: string, from: Address) => Promise<Hex>;
signTransaction: (tx: TransactionRequest) => Promise<Hex>;
};
type RedeemerFacet = {
receiveGrant: (grant: DelegationGrant) => Promise<void>;
removeGrant: (id: string) => Promise<void>;
listGrants: () => Promise<DelegationGrant[]>;
};
type OcapURLRedemptionFacet = {
redeem: (url: string) => Promise<unknown>;
};
// ---------------------------------------------------------------------------
// buildRootObject
// ---------------------------------------------------------------------------
/**
* Build the root object for the away coordinator vat.
*
* The away coordinator manages routing for the semantic wallet API on the away
* (agent) side. It keeps execution infrastructure (provider, bundler, smart
* account, tx submission, ERC-20 queries) and routes semantic calls
* (`transferNative`, `transferFungible`) through delegation twins first, then
* falls back to calling home.
*
* @param vatPowers - Special powers granted to this vat.
* @param _parameters - Initialization parameters (role: 'away').
* @param baggage - Root of vat's persistent state.
* @returns The root object for the away coordinator vat.
*/
export function buildRootObject(
vatPowers: VatPowers,
_parameters: unknown,
baggage: Baggage,
): object {
const logger = (vatPowers.logger ?? new Logger()).subLogger({
tags: ['away-coordinator'],
});
// Wire SDK logger so resolveEnvironment/registerEnvironment are visible
setSdkLogger((level, message, data) => {
if (level === 'info') {
logger.info(message, data);
} else {
logger.debug(message, data);
}
});
// -------------------------------------------------------------------------
// State variables
// -------------------------------------------------------------------------
// References to other vats (set during bootstrap)
let keyringVat: KeyringFacet | undefined;
let providerVat: ProviderFacet | undefined;
let redeemerVat: RedeemerFacet | 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;
environment?: {
EntryPoint: Hex;
DelegationManager: Hex;
SimpleFactory: Hex;
implementations: Record<string, Hex>;
caveatEnforcers: Record<string, Hex>;
};
}
| undefined;
// Smart account configuration (persisted in baggage)
let smartAccountConfig: SmartAccountConfig | undefined;
// OCAP URL redemption service (wired from services in bootstrap)
let redemptionService: OcapURLRedemptionFacet | undefined;
// Routing state
let homeSection: object | undefined; // remote ref to home's homeSection exo
let homeCoordRef: object | undefined; // remote ref to home coordinator (for delegate registration)
let delegationSections: DelegationSection[] = [];
// Keyed by delegation.id so rebuildRouting preserves in-memory spend counters.
const delegationTwinMap = new Map<string, DelegationSection>();
// -------------------------------------------------------------------------
// Baggage helpers
// -------------------------------------------------------------------------
/**
* 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;
}
/**
* 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);
}
}
// -------------------------------------------------------------------------
// Restore state from baggage (resuscitation)
// -------------------------------------------------------------------------
keyringVat = restoreFromBaggage<KeyringFacet>('keyringVat');
providerVat = restoreFromBaggage<ProviderFacet>('providerVat');
redeemerVat = restoreFromBaggage<RedeemerFacet>('redeemerVat');
externalSigner = restoreFromBaggage<ExternalSignerFacet>('externalSigner');
bundlerConfig = restoreFromBaggage<typeof bundlerConfig>('bundlerConfig');
if (bundlerConfig?.environment) {
registerEnvironment(bundlerConfig.chainId, bundlerConfig.environment);
}
smartAccountConfig =
restoreFromBaggage<SmartAccountConfig>('smartAccountConfig');
homeCoordRef = restoreFromBaggage<object>('homeCoordRef');
homeSection = restoreFromBaggage<object>('homeSection');
/** Chain ID from the last `configureProvider` call (avoids RPC on every send). */
let cachedProviderChainId: number | undefined = restoreFromBaggage<number>(
'cachedProviderChainId',
);
// -------------------------------------------------------------------------
// Internal async helpers
// -------------------------------------------------------------------------
/**
* Resolve the wallet chain ID for 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;
}
if (!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') {
if (
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;
}
if (!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);
}
/**
* Resolve the signing strategy for typed data.
* Priority: keyring → external signer → error.
* Away has no peer wallet fallback for typed data signing.
*
* @param data - The EIP-712 typed data to sign.
* @returns The signature as a hex string.
*/
async function resolveTypedDataSigning(data: Eip712TypedData): Promise<Hex> {
if (keyringVat) {
const hasKeys = await E(keyringVat).hasKeys();
if (hasKeys) {
return E(keyringVat).signTypedData(data);
}
}
if (externalSigner) {
const accounts = await E(externalSigner).getAccounts();
if (accounts.length > 0) {
return E(externalSigner).signTypedData(data, accounts[0] as Address);
}
}
if (homeCoordRef) {
return E(homeCoordRef).signTypedData(data);
}
throw new Error('No authority to sign typed data');
}
/**
* Resolve the signing strategy for a transaction.
* LOCAL KEY ONLY on away side — no peer fallback.
* Priority: keyring → external signer → error.
*
* @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');
}
/**
* 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> {
if (!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);
}
/**
* Build, sign, and submit a UserOp. Shared pipeline for delegation
* redemption.
*
* @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> {
if (!providerVat) {
throw new Error('Provider vat not available');
}
if (!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;
if (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.
if (!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';
if (!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> {
if (!bundlerConfig && !smartAccountConfig) {
throw new Error(
'Bundler not configured — cannot redeem delegation without bundler or smart account config',
);
}
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,
});
}
if (!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 };
if (options.maxFeePerGas) {
userOpOptions.maxFeePerGas = options.maxFeePerGas;
}
if (options.maxPriorityFeePerGas) {
userOpOptions.maxPriorityFeePerGas = options.maxPriorityFeePerGas;
}
return buildAndSubmitUserOp(userOpOptions);
}
/**
* 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');
}
if (
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`,
);
}
/**
* 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;
}
}
if (externalSigner) {
const accounts = await E(externalSigner).getAccounts();
if (accounts.length > 0) {
return accounts[0] as Address;
}
}
throw new Error('No accounts available');
}
/**
* 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)
if (
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).
if (!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;
if (!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;
}
if (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
if (
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).
if (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;
}
if (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;
}
// -------------------------------------------------------------------------
// Routing helpers
// -------------------------------------------------------------------------
/**
* Build a `redeemFn` closure for a given delegation.
* Used by `makeDelegationTwin` to submit delegation redemptions.
*
* @param delegation - The delegation to redeem against.
* @returns An async function that submits an execution as a delegation UserOp.
*/
function makeRedeemFn(
delegation: Delegation,
): (execution: Execution) => Promise<Hex> {
return async (execution: Execution): Promise<Hex> => {
if (bundlerConfig || smartAccountConfig) {
return submitDelegationUserOp({ delegations: [delegation], execution });
}
if (homeCoordRef) {
return E(homeCoordRef).redeemDelegation({ delegation, execution });
}
throw new Error(
'Bundler not configured — cannot redeem delegation without bundler or smart account config',
);
};
}
/**
* Rebuild the delegation sections from current redeemer grants.
* Called after `receiveDelegation` or `connectToPeer`.
*/
async function rebuildRouting(): Promise<void> {
const grants = redeemerVat ? await E(redeemerVat).listGrants() : [];
const currentIds = new Set(grants.map((grant) => grant.delegation.id));
for (const id of delegationTwinMap.keys()) {
if (!currentIds.has(id)) {
delegationTwinMap.delete(id);
}
}
for (const grant of grants) {
if (!delegationTwinMap.has(grant.delegation.id)) {
delegationTwinMap.set(
grant.delegation.id,
makeDelegationTwin({
grant,
redeemFn: makeRedeemFn(grant.delegation),
}),
);
}
}
delegationSections = grants.map(
(grant) =>
delegationTwinMap.get(grant.delegation.id) as DelegationSection,
);
}
// -------------------------------------------------------------------------
// Exo (public API)
// -------------------------------------------------------------------------
const awayCoordinator = makeDefaultExo('awayCoordinator', {
// ------------------------------------------------------------------
// Lifecycle
// ------------------------------------------------------------------
/**
* Wire vat references and services. Called by the kernel during subcluster
* bootstrap.
*
* @param vats - References to co-located vats.
* @param services - External services available to this subcluster.
*/
async bootstrap(vats: WalletVats, services: WalletServices): Promise<void> {
keyringVat = vats.keyring as KeyringFacet | undefined;
providerVat = vats.provider as ProviderFacet | undefined;
redeemerVat = vats.redeemer as RedeemerFacet | undefined;
redemptionService = services.ocapURLRedemptionService as
| OcapURLRedemptionFacet
| undefined;
if (keyringVat) {
persistBaggage('keyringVat', keyringVat);
}
if (providerVat) {
persistBaggage('providerVat', providerVat);
}
if (redeemerVat) {
persistBaggage('redeemerVat', redeemerVat);
}
logger.info('away bootstrap complete', {
hasKeyring: Boolean(keyringVat),
hasProvider: Boolean(providerVat),
hasRedeemer: Boolean(redeemerVat),
});
// Rebuild routing from persisted state (e.g. after kernel restart).
// homeSection is already restored from baggage; grants come from redeemerVat.
if (redeemerVat || homeSection) {
await rebuildRouting();
}
},
// ------------------------------------------------------------------
// Keyring
// ------------------------------------------------------------------
/**
* Initialize the keyring vat with a seed phrase or throwaway entropy.
*
* @param options - Keyring initialization options.
* @param options.type - 'srp' for a seed phrase, 'throwaway' for ephemeral key.
* @param options.mnemonic - BIP-39 mnemonic (srp only).
* @param options.entropy - Random entropy hex (throwaway only).
* @param options.password - Encryption password (srp only).
* @param options.salt - Encryption salt (srp only).
* @param options.addressIndex - HD derivation index (srp only).
*/
async initializeKeyring(options: {
type: 'srp' | 'throwaway';
mnemonic?: string;
entropy?: Hex;
password?: string;
salt?: string;
addressIndex?: number;
}): Promise<void> {
if (!keyringVat) {
throw new Error('Keyring vat not available');
}
let initOptions:
| { type: 'srp'; mnemonic: string; addressIndex?: number }
| { type: 'throwaway'; entropy?: Hex };
if (options.type === 'throwaway') {
initOptions = { type: 'throwaway', entropy: options.entropy };
} else {
initOptions =
options.addressIndex === undefined
? { type: 'srp', mnemonic: options.mnemonic ?? '' }
: {
type: 'srp',
mnemonic: options.mnemonic ?? '',
addressIndex: options.addressIndex,
};
}
const password = options.type === 'srp' ? options.password : undefined;
await E(keyringVat).initialize(initOptions, password, options.salt);
},
/**
* Unlock the keyring with the stored password.
*
* @param password - The decryption password.
*/
async unlockKeyring(password: string): Promise<void> {
if (!keyringVat) {
throw new Error('Keyring vat not available');
}
await E(keyringVat).unlock(password);
},
/**
* Check whether the keyring is currently locked.
*
* @returns True if the keyring is locked, false otherwise.
*/
async isKeyringLocked(): Promise<boolean> {
if (!keyringVat) {
throw new Error('Keyring vat not available');
}
return E(keyringVat).isLocked();
},
// ------------------------------------------------------------------
// Provider & bundler configuration
// ------------------------------------------------------------------
/**
* Configure the JSON-RPC provider (sets RPC URL and chain ID).
*
* @param chainConfig - Chain configuration with RPC URL and chain ID.
*/
async configureProvider(chainConfig: ChainConfig): Promise<void> {
if (!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: ${String(chainConfig.chainId)}. Must be a positive integer.`,
);
}
await E(providerVat).configure(chainConfig);
cachedProviderChainId = chainConfig.chainId;
persistBaggage('cachedProviderChainId', cachedProviderChainId);
},
/**
* Configure the ERC-4337 bundler for UserOp submission.
*
* @param config - Bundler configuration.
* @param config.bundlerUrl - The bundler RPC URL.
* @param config.entryPoint - EntryPoint contract address (defaults to v0.7).
* @param config.chainId - The chain ID the bundler operates on.
* @param config.usePaymaster - Whether to use paymaster sponsorship.
* @param config.sponsorshipPolicyId - Paymaster policy ID for sponsored ops.
* @param config.environment - Custom SDK environment for non-standard chains.
* @param config.environment.EntryPoint - EntryPoint contract address.
* @param config.environment.DelegationManager - DelegationManager contract address.
* @param config.environment.SimpleFactory - SimpleFactory contract address.
* @param config.environment.implementations - Map of implementation names to addresses.
* @param config.environment.caveatEnforcers - Map of enforcer names to addresses.
*/
async configureBundler(config: {
bundlerUrl: string;
entryPoint?: Hex;
chainId: number;
usePaymaster?: boolean;
sponsorshipPolicyId?: string;
environment?: {
EntryPoint: Hex;
DelegationManager: Hex;
SimpleFactory: Hex;
implementations: Record<string, Hex>;
caveatEnforcers: Record<string, Hex>;
};
}): Promise<void> {
// Validate bundler URL (regex — URL constructor unavailable under SES)
if (!/^https?:\/\/.+/u.test(config.bundlerUrl)) {
throw new Error(
`Invalid bundler URL: "${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.`,
);
}
// Register a custom SDK environment for chains not in the SDK's built-in
// registry (e.g. local Anvil at chain 31337).
if (config.environment) {
registerEnvironment(config.chainId, config.environment);
}
bundlerConfig = harden({
bundlerUrl: config.bundlerUrl,
entryPoint: config.entryPoint ?? ENTRY_POINT_V07,
chainId: config.chainId,
usePaymaster: config.usePaymaster,
sponsorshipPolicyId: config.sponsorshipPolicyId,
environment: config.environment,
});
persistBaggage('bundlerConfig', bundlerConfig);
logger.info('bundler configured', {
bundlerUrl: config.bundlerUrl,
chainId: config.chainId,
entryPoint: bundlerConfig.entryPoint,
hasEnvironment: Boolean(config.environment),
});
if (!providerVat) {
throw new Error(
'Provider vat not available. Call configureProvider() before configureBundler().',
);
}
await E(providerVat).configureBundler({
bundlerUrl: config.bundlerUrl,
chainId: config.chainId,
});
},
/**
* Connect an external signer (e.g. MetaMask) for transaction signing.
*
* @param signer - The external signer facet.
*/
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);
},
// ------------------------------------------------------------------
// Smart account configuration
// ------------------------------------------------------------------
/**
* Create or restore a smart account configuration.
*
* @param config - Smart account creation options.
* @param config.deploySalt - Optional deploy salt for counterfactual address derivation.
* @param config.chainId - The chain ID the smart account is deployed on.
* @param config.address - Optional explicit smart account address (skips derivation).
* @param config.implementation - 'hybrid' (ERC-4337) or 'stateless7702' (EIP-7702).
* @returns The smart account configuration including the derived address.
*/
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;
},
/**
* Return the smart account address, if one is configured.
*
* @returns The smart account address, or undefined.
*/
async getSmartAccountAddress(): Promise<Address | undefined> {
return smartAccountConfig?.address;
},
// ------------------------------------------------------------------
// Public wallet API
// ------------------------------------------------------------------
/**
* Return all locally available accounts (keyring + external signer).
*
* @returns Array of Ethereum addresses.
*/
async getAccounts(): Promise<Address[]> {
// Peer (home) accounts take priority — they are the identity visible to
// the outside world. Local throwaway keys are exposed only via
// getCapabilities().localAccounts, not here.
if (homeCoordRef) {
return E(homeCoordRef).getAccounts();
}
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;
},
/**
* Sign a raw transaction using the local key (keyring or external signer).
* Away coordinator has no peer wallet fallback for signing.
*
* @param tx - The transaction request to sign.
* @returns The signed transaction as a hex string.
*/
async signTransaction(tx: TransactionRequest): Promise<Hex> {
return resolveTransactionSigning(tx);
},
/**
* Sign an arbitrary message using the local key (keyring or external signer).
*
* @param message - The message to sign.
* @returns The signature as a hex string.
*/
async signMessage(message: string): Promise<Hex> {
if (keyringVat) {
const hasKeys = await E(keyringVat).hasKeys();
if (hasKeys) {
return E(keyringVat).signMessage(message);
}
}
if (externalSigner) {
const accounts = await E(externalSigner).getAccounts();
if (accounts.length > 0) {
return E(externalSigner).signMessage(message, accounts[0] as Address);
}
}
if (homeCoordRef) {
return E(homeCoordRef).signMessage(message);
}
throw new Error('No authority to sign message');
},
/**
* Sign EIP-712 typed data using the local key (keyring or external signer).
*
* @param data - The EIP-712 typed data to sign.
* @returns The signature as a hex string.
*/
async signTypedData(data: Eip712TypedData): Promise<Hex> {
return resolveTypedDataSigning(data);
},
/**
* Send a transaction using the direct path only (no delegation matching).
* Away's delegation routing goes through transferNative/transferFungible, not sendTransaction.
*
* @param tx - The transaction request.
* @returns The transaction hash.
*/
async sendTransaction(tx: TransactionRequest): Promise<Hex> {
if (!providerVat) {
throw new Error('Provider not configured');
}
logger.debug('sendTransaction (direct path only)', {
from: tx.from,
to: tx.to,
value: tx.value,
hasBundlerConfig: Boolean(bundlerConfig),
});
// Direct (non-delegation) send: estimate missing gas fields
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);
},
/**
* Pass a JSON-RPC method call through to the provider vat.
*
* @param method - The JSON-RPC method name.
* @param params - Optional method parameters.
* @returns The raw RPC response.
*/
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;
},
/**
* Poll for a UserOp receipt until it appears or the timeout elapses.
*
* @param options - Polling options.
* @param options.userOpHash - The UserOp hash returned by the bundler.
* @param options.pollIntervalMs - Delay between polls in milliseconds.
* @param options.timeoutMs - Maximum time to wait in milliseconds.
* @returns The raw receipt object from the bundler.
*/
async waitForUserOpReceipt(options: {
userOpHash: Hex;
pollIntervalMs?: number;
timeoutMs?: number;
}): Promise<unknown> {
if (!providerVat || !bundlerConfig) {
throw new Error('Provider and bundler must be configured');
}
if (
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.
* 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);
},
// ------------------------------------------------------------------
// ERC-20 token utilities
// ------------------------------------------------------------------
/**
* Query the ERC-20 token balance for an owner address.
*
* @param options - Query options.
* @param options.token - Token contract address.
* @param options.owner - Account address to query.
* @returns The balance as a decimal string.
*/
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();
},
/**
* Query the name, symbol, and decimals of an ERC-20 token.
*
* @param options - Query options.
* @param options.token - Token contract address.
* @returns An object with name, symbol, and decimals.
*/
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
if (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';
if (nameSettled.status === 'fulfilled') {
try {
name = decodeNameResult(
validateTokenCallResult(nameSettled.value, 'name', options.token),
);
} catch {
// name() not implemented or returned invalid data
}
}
let symbol = 'Unknown';
if (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,
),
),
});
},
// ------------------------------------------------------------------
// Semantic wallet API
// ------------------------------------------------------------------
/**
* Transfer native ETH.
* Tries each matching delegation twin in order; the first success is
* returned. If all matched twins fail, throws with all collected errors
* as the cause array; does not fall through to the home section.
*
* @param to - Recipient address.
* @param amount - Amount in wei.
* @returns The transaction hash.
*/
async transferNative(
to: Address,
amount: string | number | bigint,
): Promise<Hex> {
// Coerce at the JSON boundary — CLI callers pass numeric strings.
const amt = BigInt(amount);
const matching = delegationSections.filter(
(sec) => sec.method === 'transferNative',
);
if (matching.length > 0) {
const errors: unknown[] = [];
for (const section of matching) {
try {
return await E(section.exo).transferNative(to, amt);
} catch (error) {
errors.push(error);
}
}
throw new Error('All delegation twins failed', { cause: errors });
}
if (homeSection) {
return E(homeSection).transferNative(to, amt);
}
throw new Error(
'No routing available — call connectToPeer first or receive a delegation',
);
},
/**
* Transfer ERC-20 tokens.
* Tries each matching delegation twin in order; the first success is
* returned. If all matched twins fail, throws with all collected errors
* as the cause array; does not fall through to the home section.
*
* @param token - ERC-20 token contract address.
* @param to - Recipient address.
* @param amount - Amount in token units.
* @returns The transaction hash.
*/
async transferFungible(
token: Address,
to: Address,
amount: string | number | bigint,
): Promise<Hex> {
// Coerce at the JSON boundary — CLI callers pass numeric strings.
const amt = BigInt(amount);
const tokenLower = token.toLowerCase() as Address;
const matching = delegationSections.filter(
(sec) => sec.method === 'transferFungible' && sec.token === tokenLower,
);
if (matching.length > 0) {
const errors: unknown[] = [];
for (const section of matching) {
try {
return await E(section.exo).transferFungible(tokenLower, to, amt);
} catch (error) {
errors.push(error);
}
}
throw new Error('All delegation twins failed', { cause: errors });
}
if (homeSection) {
return E(homeSection).transferFungible(token, to, amt);
}
throw new Error(
'No routing available — call connectToPeer first or receive a delegation',
);
},
/**
* Receive a delegation grant from home and persist it to the redeemer vat.
* Rebuilds the delegation sections to incorporate the new grant.
*
* @param grant - The semantic delegation grant to store.
*/
async receiveDelegation(grant: DelegationGrant): Promise<void> {
if (!redeemerVat) {
throw new Error('Redeemer vat not available');
}
await E(redeemerVat).receiveGrant(grant);
await rebuildRouting();
},
/**
* List all delegation grants stored in the redeemer vat.
*
* @returns An array of all DelegationGrant objects received on this device.
*/
async listGrants(): Promise<DelegationGrant[]> {
if (!redeemerVat) {
return [];
}
return E(redeemerVat).listGrants();
},
/**
* Connect to the home coordinator via an OCAP URL.
* Redeems the URL to obtain a remote reference to the home coordinator,
* then fetches the home section exo for the call-home fallback path.
* Persists homeCoordRef and homeSection and rebuilds routing.
*
* @param ocapUrl - The OCAP URL issued by the home coordinator.
*/
async connectToPeer(ocapUrl: string): Promise<void> {
if (!redemptionService) {
throw new Error('OCAP URL redemption service not available');
}
homeCoordRef = await E(redemptionService).redeem(ocapUrl);
homeSection = await E(homeCoordRef).getHomeSection();
persistBaggage('homeCoordRef', homeCoordRef);
persistBaggage('homeSection', homeSection);
await rebuildRouting();
},
/**
* Refresh cached peer accounts from the home coordinator.
* No-op if no home coordinator connection has been established.
*/
async refreshPeerAccounts(): Promise<void> {
if (!homeCoordRef) {
return;
}
await E(homeCoordRef).getAccounts();
},
/**
* Register this device's delegate address on the home coordinator.
* Called after connecting to the peer to allow the home coordinator to
* record the away wallet's on-chain delegate address.
*
* @param address - The away wallet's delegate address (0x-prefixed).
*/
async sendDelegateAddressToPeer(address: string): Promise<void> {
if (!homeCoordRef) {
throw new Error('Not connected to a peer — call connectToPeer first');
}
await E(homeCoordRef).registerDelegateAddress(address);
},
// ------------------------------------------------------------------
// Introspection
// ------------------------------------------------------------------
/**
* Return a summary of the away coordinator's current capabilities.
* Reflects away-side state: local key, bundler, smart account, grants
* count (from redeemerVat), and whether homeSection is wired.
*
* @returns A WalletCapabilities object describing current state.
*/
async getCapabilities(): Promise<WalletCapabilities> {
const hasLocalKeys = keyringVat ? await E(keyringVat).hasKeys() : false;
const localAccounts: Address[] = keyringVat
? await E(keyringVat).getAccounts()
: [];
const grants = redeemerVat ? await E(redeemerVat).listGrants() : [];
let signingMode = 'none';
if (externalSigner) {
signingMode = 'external:metamask';
} else if (hasLocalKeys) {
signingMode = 'local';
}
let autonomy = 'no signing authority';
if (grants.length > 0) {
// Describe any native ETH amount limits in human-readable form.
const limitParts: string[] = grants
.filter(
(grant) =>
grant.method === 'transferNative' &&
grant.maxAmount !== undefined,
)
.map(
(grant) =>
`max ${weiToEth(`0x${BigInt(grant.maxAmount ?? 0n).toString(16)}`)} per tx`,
);
const limitSuffix =
limitParts.length > 0 ? ` (${limitParts.join('; ')})` : '';
autonomy = `autonomous via ${grants.length} delegation(s)${limitSuffix}`;
} else if (homeSection) {
autonomy = 'call-home (no delegations)';
}
let capabilityChainId: number | undefined;
try {
capabilityChainId = await resolveChainId();
} catch {
// ignore — chain ID may not be configured yet
}
return harden({
hasLocalKeys,
localAccounts,
delegationCount: grants.length,
hasPeerWallet: homeSection !== undefined,
hasExternalSigner: externalSigner !== undefined,
hasBundlerConfig: bundlerConfig !== undefined,
smartAccountAddress: smartAccountConfig?.address,
chainId: capabilityChainId,
signingMode,
autonomy,
});
},
});
return awayCoordinator;
}
|