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APIErrorCode,
ApiError,
Bytes,
Cbor,
Cip30DataSignature,
Cip95WalletApi,
DataSignError,
DataSignErrorCode,
Paginate,
SenderContext,
TxSendError,
TxSendErrorCode,
TxSignError,
TxSignErrorCode,
WalletApi,
WalletApiExtension,
WithSenderContext
} from '@cardano-sdk/dapp-connector';
import { Cardano, Serialization, coalesceValueQuantities } from '@cardano-sdk/core';
import { HexBlob, ManagedFreeableScope } from '@cardano-sdk/util';
import { InputSelectionError, InputSelectionFailure } from '@cardano-sdk/input-selection';
import { Logger } from 'ts-log';
import { MessageSender } from '@cardano-sdk/key-management';
import { Observable, firstValueFrom, from, map, mergeMap, race, throwError } from 'rxjs';
import { ObservableWallet } from './types';
import { requiresForeignSignatures } from './services';
import uniq from 'lodash/uniq.js';
export type Cip30WalletDependencies = {
logger: Logger;
};
export enum Cip30ConfirmationCallbackType {
SignData = 'sign_data',
SignTx = 'sign_tx',
SubmitTx = 'submit_tx',
GetCollateral = 'get_collateral'
}
export type SignDataCallbackParams = {
type: Cip30ConfirmationCallbackType.SignData;
sender: MessageSender;
data: {
addr: Cardano.PaymentAddress | Cardano.DRepID;
payload: HexBlob;
};
};
export type SignTxCallbackParams = {
sender: MessageSender;
type: Cip30ConfirmationCallbackType.SignTx;
data: Cardano.Tx;
};
export type SubmitTxCallbackParams = {
type: Cip30ConfirmationCallbackType.SubmitTx;
data: Cardano.Tx;
};
// Optional callback
export type GetCollateralCallbackParams = {
sender: MessageSender;
type: Cip30ConfirmationCallbackType.GetCollateral;
data: {
amount: Cardano.Lovelace;
utxos: Cardano.Utxo[];
};
};
type GetCollateralCallback = (args: GetCollateralCallbackParams) => Promise<Cardano.Utxo[]>;
export type SignConfirmationOk = { cancel$: Observable<void> };
export type SignConfirmationResult = SignConfirmationOk | false;
const signOrCancel = <T>(result: Promise<T>, { cancel$ }: SignConfirmationOk, createError: () => Error) =>
firstValueFrom(race(from(result), cancel$.pipe(mergeMap(() => throwError(createError)))));
export type CallbackConfirmation = {
signData: (args: SignDataCallbackParams) => Promise<SignConfirmationResult>;
signTx: (args: SignTxCallbackParams) => Promise<SignConfirmationResult>;
submitTx: (args: SubmitTxCallbackParams) => Promise<boolean>;
getCollateral?: GetCollateralCallback;
};
const mapCallbackFailure = (err: unknown, logger: Logger): false => {
logger.error(err);
return false;
};
const processTxInput = (input: string) => {
try {
const cbor = Serialization.TxCBOR(input);
const tx = Serialization.TxCBOR.deserialize(cbor);
return { cbor, tx };
} catch {
throw new ApiError(APIErrorCode.InvalidRequest, "Couldn't parse transaction. Expecting hex-encoded CBOR string.");
}
};
const MAX_COLLATERAL_AMOUNT = 5_000_000n;
const compareUtxos = (utxo: Cardano.Utxo, comparedTo: Cardano.Utxo) => {
const currentCoin = utxo[1].value.coins;
const comparedToCoin = comparedTo[1].value.coins;
if (currentCoin < comparedToCoin) return -1;
if (currentCoin > comparedToCoin) return 1;
return 0;
};
const cardanoAddressToCbor = (address: Cardano.PaymentAddress | Cardano.RewardAccount): Cbor => {
const addr = Cardano.Address.fromString(address);
Iif (!addr) {
throw new ApiError(APIErrorCode.InternalError, `could not transform address ${address} to CBOR`);
}
return addr.toBytes();
};
const formatUnknownError = (error: unknown): string => (error as Error)?.message || 'Unknown error';
const parseValueCbor = (value: Cbor) => {
try {
return Serialization.Value.fromCbor(value as unknown as HexBlob);
} catch {
throw new ApiError(APIErrorCode.InvalidRequest, 'could not parse Value');
}
};
const dumbSelection = (utxos: Cardano.Utxo[], target: Cardano.Value) => {
const selectedUtxos: Cardano.Utxo[] = [];
const filterAmountAssets = [...(target.assets?.entries() || [])];
let foundEnough = false;
for (const utxo of utxos) {
selectedUtxos.push(utxo);
const selectedValue = coalesceValueQuantities(selectedUtxos.map(([_, { value }]) => value));
foundEnough =
selectedValue.coins >= target.coins &&
filterAmountAssets.every(
([assetId, requestedQuantity]) => (selectedValue.assets?.get(assetId) || 0n) >= requestedQuantity
);
if (foundEnough) {
break;
}
}
if (!foundEnough) {
return null;
}
return selectedUtxos;
};
const walletSelection = async (target: Cardano.Value, wallet: ObservableWallet) => {
try {
/**
* Getting UTxOs to meet a required amount is a complex operation,
* which is handled by input selection capabilities. By initializing
* a transaction we're able to utilise the internal configuration and
* algorithm to make this selection, using a wallet address to
* satisfy the interface only.
*/
const addresses = await firstValueFrom(wallet.addresses$);
const { inputSelection } = await wallet.initializeTx({
outputs: new Set([{ address: addresses[0].address, value: target }])
});
return [...inputSelection.inputs];
} catch (error) {
if (error instanceof InputSelectionError && error.failure === InputSelectionFailure.UtxoBalanceInsufficient) {
return null;
}
const message = formatUnknownError(error);
throw new ApiError(APIErrorCode.InternalError, message);
}
};
/**
* Select utxo via either default wallet's default input selection algorithm,
* or 'dumb selection', which should preserve the order of utxos for pagination.
*/
const selectUtxo = async (wallet: ObservableWallet, filterAmount: Cardano.Value, useDumbSelection: boolean) =>
useDumbSelection
? dumbSelection(await firstValueFrom(wallet.utxo.available$), filterAmount)
: await walletSelection(filterAmount, wallet);
/** Returns an array of UTxOs that do not contain assets */
const getUtxosWithoutAssets = (utxos: Cardano.Utxo[]): Cardano.Utxo[] => utxos.filter((utxo) => !utxo[1].value.assets);
const getFilterAsBigNum = (amount: Cbor): bigint => {
const reader = new Serialization.CborReader(HexBlob(amount));
if (
reader.peekState() === Serialization.CborReaderState.Tag &&
reader.peekTag() === Serialization.CborTag.UnsignedBigNum
) {
reader.readTag();
return BigInt(`0x${HexBlob.fromBytes(reader.readByteString())}`).valueOf();
}
return reader.readInt();
};
const getFilterAmount = (amount: Cbor): bigint => {
try {
const filterAmount = getFilterAsBigNum(amount);
if (filterAmount > MAX_COLLATERAL_AMOUNT) {
throw new ApiError(APIErrorCode.InvalidRequest, 'requested amount is too big');
}
return filterAmount;
} catch (error) {
throw new ApiError(APIErrorCode.InternalError, formatUnknownError(error));
}
};
/**
* getCollateralCallback
*
* @param sender The sender of the request
* @param amount ADA collateral required in lovelaces
* @param availableUtxos available UTxOs
* @param callback Callback to execute to attempt setting new collateral
* @param logger The logger instance
* @returns Promise<Cbor[]> or null
*/
const getCollateralCallback = async (
sender: MessageSender,
amount: Cardano.Lovelace,
availableUtxos: Cardano.Utxo[],
callback: GetCollateralCallback,
logger: Logger
) => {
Iif (availableUtxos.length === 0) return null;
const availableUtxosWithoutAssets = getUtxosWithoutAssets(availableUtxos);
try {
// Send the amount and filtered available UTxOs to the callback
// Client can then choose to mark a UTxO set as unspendable
const newCollateral = await callback({
data: {
amount,
utxos: availableUtxosWithoutAssets
},
sender,
type: Cip30ConfirmationCallbackType.GetCollateral
});
return newCollateral.map((core) => Serialization.TransactionUnspentOutput.fromCore(core).toCbor());
} catch (error) {
logger.error(error);
Iif (error instanceof ApiError) {
throw error;
}
throw new ApiError(APIErrorCode.InternalError, formatUnknownError(error));
}
};
const getSortedUtxos = async (observableUtxos: Observable<Cardano.Utxo[]>): Promise<Cardano.Utxo[]> => {
const utxos = await firstValueFrom(observableUtxos);
return utxos.sort(compareUtxos);
};
const baseCip30WalletApi = (
wallet$: Observable<ObservableWallet>,
confirmationCallback: CallbackConfirmation,
{ logger }: Cip30WalletDependencies
) => ({
getBalance: async (): Promise<Cbor> => {
logger.debug('getting balance');
try {
const wallet = await firstValueFrom(wallet$);
const value = await firstValueFrom(wallet.balance.utxo.available$);
return Serialization.Value.fromCore(value).toCbor();
} catch (error) {
logger.error(error);
throw error;
}
},
getChangeAddress: async (): Promise<Cbor> => {
logger.debug('getting changeAddress');
try {
const wallet = await firstValueFrom(wallet$);
const addresses = await firstValueFrom(wallet.addresses$);
const address = addresses[0].address;
Iif (!address) {
logger.error('could not get change address');
throw new ApiError(APIErrorCode.InternalError, 'could not get change address');
} else {
return cardanoAddressToCbor(address);
}
} catch (error) {
logger.error(error);
Iif (error instanceof ApiError) {
throw error;
}
throw new ApiError(APIErrorCode.InternalError, formatUnknownError(error));
}
},
// eslint-disable-next-line max-statements, sonarjs/cognitive-complexity,complexity
getCollateral: async (
{ sender }: SenderContext,
{ amount = new Serialization.Value(MAX_COLLATERAL_AMOUNT).toCbor() }: { amount?: Cbor } = {}
): Promise<
Cbor[] | null
// eslint-disable-next-line sonarjs/cognitive-complexity, max-statements
> => {
logger.debug('getting collateral');
const wallet = await firstValueFrom(wallet$);
let unspendables = await getSortedUtxos(wallet.utxo.unspendable$);
const available = await getSortedUtxos(wallet.utxo.available$);
// No available unspendable UTxO
if (unspendables.length === 0) {
if (available.length > 0 && !!confirmationCallback.getCollateral) {
// available UTxOs could be set as collateral based on user preference
return await getCollateralCallback(
sender,
getFilterAmount(amount),
available,
confirmationCallback.getCollateral,
logger
);
}
return null;
}
if (unspendables.some((utxo) => utxo[1].value.assets && utxo[1].value.assets.size > 0)) {
throw new ApiError(APIErrorCode.Refused, 'unspendable UTxOs must not contain assets when used as collateral');
}
if (amount) {
const filterAmount = getFilterAmount(amount);
try {
const utxos = [];
let totalCoins = 0n;
for (const utxo of unspendables) {
const coin = utxo[1].value.coins;
totalCoins += coin;
utxos.push(utxo);
if (totalCoins >= filterAmount) break;
}
if (totalCoins < filterAmount) {
// if no collateral available by amount in unspendables, return callback if provided to set unspendables and return in the callback
if (available.length > 0 && !!confirmationCallback.getCollateral) {
return await getCollateralCallback(
sender,
filterAmount,
available,
confirmationCallback.getCollateral,
logger
);
}
throw new ApiError(APIErrorCode.Refused, 'not enough coins in configured collateral UTxOs');
}
unspendables = utxos;
} catch (error) {
logger.error(error);
if (error instanceof ApiError) {
throw error;
}
throw new ApiError(APIErrorCode.InternalError, formatUnknownError(error));
}
}
return unspendables.map((core) => Serialization.TransactionUnspentOutput.fromCore(core).toCbor());
},
getExtensions: async (): Promise<WalletApiExtension[]> => {
logger.debug('getting enabled extensions');
return Promise.resolve([{ cip: 95 }]);
},
getNetworkId: async (): Promise<Cardano.NetworkId> => {
logger.debug('getting networkId');
const wallet = await firstValueFrom(wallet$);
const genesisParameters = await firstValueFrom(wallet.genesisParameters$);
return genesisParameters.networkId;
},
getRewardAddresses: async (): Promise<Cbor[]> => {
logger.debug('getting reward addresses');
try {
const wallet = await firstValueFrom(wallet$);
const walletAddresses = await firstValueFrom(wallet.addresses$);
const rewardAccounts = uniq(walletAddresses.map((address) => address.rewardAccount));
Iif (!rewardAccounts || rewardAccounts.length === 0) {
throw new ApiError(APIErrorCode.InternalError, 'could not get reward address');
} else {
return rewardAccounts.map((rewardAccount) => cardanoAddressToCbor(rewardAccount));
}
} catch (error) {
logger.error(error);
Iif (error instanceof ApiError) {
throw error;
}
throw new ApiError(APIErrorCode.InternalError, formatUnknownError(error));
}
},
getUnusedAddresses: async (): Promise<Cbor[]> => {
logger.debug('getting unused addresses');
const wallet = await firstValueFrom(wallet$);
const addresses = await wallet.getNextUnusedAddress();
return addresses.map((groupAddresses) => cardanoAddressToCbor(groupAddresses.address));
},
getUsedAddresses: async (): Promise<Cbor[]> => {
logger.debug('getting used addresses');
const wallet = await firstValueFrom(wallet$);
const trackedAddresses = await firstValueFrom(wallet.addresses$);
const unusedAddresses = await wallet.getNextUnusedAddress();
const addresses = trackedAddresses.filter((address) => !unusedAddresses.includes(address));
return addresses.map((groupAddresses) => cardanoAddressToCbor(groupAddresses.address));
},
getUtxos: async (_: SenderContext, amount?: Cbor, paginate?: Paginate): Promise<Cbor[] | null> => {
const scope = new ManagedFreeableScope();
try {
const wallet = await firstValueFrom(wallet$);
let utxos = amount
? await selectUtxo(wallet, parseValueCbor(amount).toCore(), !!paginate)
: await firstValueFrom(wallet.utxo.available$);
if (!utxos) return null;
if (paginate) {
utxos = utxos.slice(paginate.page * paginate.limit, paginate.page * paginate.limit + paginate.limit);
}
const cbor = utxos.map((core) => Serialization.TransactionUnspentOutput.fromCore(core).toCbor());
scope.dispose();
return cbor;
} finally {
scope.dispose();
}
},
signData: async (
{ sender }: SenderContext,
addr: Cardano.PaymentAddress | Cardano.DRepID | Bytes,
payload: Bytes
): Promise<Cip30DataSignature> => {
logger.debug('signData');
const hexBlobPayload = HexBlob(payload);
const signWith = Cardano.DRepID.isValid(addr) ? Cardano.DRepID(addr) : Cardano.PaymentAddress(addr);
const confirmationResult = await confirmationCallback
.signData({
data: {
addr: signWith,
payload: hexBlobPayload
},
sender,
type: Cip30ConfirmationCallbackType.SignData
})
.catch((error) => mapCallbackFailure(error, logger));
if (confirmationResult) {
const wallet = await firstValueFrom(wallet$);
return signOrCancel(
wallet.signData({
payload: hexBlobPayload,
sender,
signWith
}),
confirmationResult,
() => new DataSignError(DataSignErrorCode.UserDeclined, 'user declined signing')
);
}
logger.debug('sign data declined');
throw new DataSignError(DataSignErrorCode.UserDeclined, 'user declined signing');
},
signTx: async ({ sender }: SenderContext, tx: Cbor, partialSign?: Boolean): Promise<Cbor> => {
const scope = new ManagedFreeableScope();
logger.debug('signTx', tx);
const txCbor = Serialization.TxCBOR(tx);
const txDecoded = Serialization.Transaction.fromCbor(txCbor);
const wallet = await firstValueFrom(wallet$);
const coreTx = txDecoded.toCore();
const needsForeignSignature = await requiresForeignSignatures(coreTx, wallet);
// If partialSign is false and the wallet could not sign the entire transaction
if (!partialSign && needsForeignSignature)
throw new TxSignError(
TxSignErrorCode.ProofGeneration,
'The wallet does not have the secret key associated with some of the inputs or certificates.'
);
const confirmationResult = await confirmationCallback
.signTx({
data: coreTx,
sender,
type: Cip30ConfirmationCallbackType.SignTx
})
.catch((error) => mapCallbackFailure(error, logger));
if (confirmationResult) {
try {
const {
witness: { signatures }
} = await signOrCancel(
wallet.finalizeTx({
signingContext: { sender },
tx: txCbor
}),
confirmationResult,
() => new TxSignError(TxSignErrorCode.UserDeclined, 'user declined signing tx')
);
// If partialSign is true, the wallet only tries to sign what it can. However, if
// signatures size is 0 then throw.
if (partialSign && signatures.size === 0) {
throw new TxSignError(
TxSignErrorCode.ProofGeneration,
'The wallet does not have the secret key associated with any of the inputs and certificates.'
);
}
const cbor = Serialization.TransactionWitnessSet.fromCore({ signatures }).toCbor();
return Promise.resolve(cbor);
} catch (error) {
if (error instanceof TxSignError) {
throw error;
} else E{
logger.error(error);
const message = formatUnknownError(error);
throw new TxSignError(TxSignErrorCode.UserDeclined, message);
}
} finally {
scope.dispose();
}
} else {
scope.dispose();
throw new TxSignError(TxSignErrorCode.UserDeclined, 'user declined signing tx');
}
},
submitTx: async (_: SenderContext, input: Cbor): Promise<string> => {
logger.debug('submitting tx');
const { cbor, tx } = processTxInput(input);
const shouldProceed = await confirmationCallback
.submitTx({
data: tx,
type: Cip30ConfirmationCallbackType.SubmitTx
})
.catch((error) => mapCallbackFailure(error, logger));
if (shouldProceed) {
try {
const wallet = await firstValueFrom(wallet$);
await wallet.submitTx(cbor);
return tx.id;
} catch (error) {
logger.error(error);
const info = error instanceof Error ? error.message : 'unknown';
throw new TxSendError(TxSendErrorCode.Failure, info);
}
} else {
logger.debug('transaction refused');
throw new TxSendError(TxSendErrorCode.Refused, 'transaction refused');
}
}
});
const getPubStakeKeys = async (
wallet$: Observable<ObservableWallet>,
filter: Cardano.StakeCredentialStatus.Registered | Cardano.StakeCredentialStatus.Unregistered
) => {
const wallet = await firstValueFrom(wallet$);
return firstValueFrom(
wallet.publicStakeKeys$.pipe(
map((keys) =>
keys.filter(({ credentialStatus }) => {
const status =
credentialStatus === Cardano.StakeCredentialStatus.Registered ||
credentialStatus === Cardano.StakeCredentialStatus.Registering
? Cardano.StakeCredentialStatus.Registered
: Cardano.StakeCredentialStatus.Unregistered;
return filter === status;
})
),
map((keys) => keys.map(({ publicStakeKey }) => publicStakeKey))
)
);
};
const extendedCip95WalletApi = (
wallet$: Observable<ObservableWallet>,
{ logger }: Cip30WalletDependencies
): Cip95WalletApi => ({
getPubDRepKey: async () => {
logger.debug('getting public DRep key');
try {
const wallet = await firstValueFrom(wallet$);
const dReKey = await wallet.governance.getPubDRepKey();
Iif (!dReKey) throw new Error('Shared wallet does not support DRep key');
return dReKey;
} catch (error) {
logger.error(error);
throw new ApiError(APIErrorCode.InternalError, formatUnknownError(error));
}
},
getRegisteredPubStakeKeys: async () => {
logger.debug('getting registered public stake keys');
try {
return await getPubStakeKeys(wallet$, Cardano.StakeCredentialStatus.Registered);
} catch (error) {
logger.error(error);
throw new ApiError(APIErrorCode.InternalError, formatUnknownError(error));
}
},
getUnregisteredPubStakeKeys: async () => {
logger.debug('getting unregistered public stake keys');
try {
return await getPubStakeKeys(wallet$, Cardano.StakeCredentialStatus.Unregistered);
} catch (error) {
logger.error(error);
throw new ApiError(APIErrorCode.InternalError, formatUnknownError(error));
}
}
});
export const createWalletApi = (
wallet$: Observable<ObservableWallet>,
confirmationCallback: CallbackConfirmation,
{ logger }: Cip30WalletDependencies
): WithSenderContext<WalletApi> => ({
...baseCip30WalletApi(wallet$, confirmationCallback, { logger }),
...extendedCip95WalletApi(wallet$, { logger })
});
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