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import {
BlockfrostClient,
BlockfrostProvider,
BlockfrostToCore,
BlockfrostTransactionContent,
blockfrostMetadataToTxMetadata,
fetchSequentially,
isBlockfrostNotFoundError
} from '../blockfrost';
import {
BlocksByIdsArgs,
Cardano,
ChainHistoryProvider,
NetworkInfoProvider,
Paginated,
ProviderError,
ProviderFailure,
Serialization,
TransactionsByAddressesArgs,
TransactionsByIdsArgs,
createSlotEpochCalc
} from '@cardano-sdk/core';
import { Logger } from 'ts-log';
import { extractCredentials, minimizeCredentialSet } from '../credentialUtils';
import omit from 'lodash/omit.js';
import uniq from 'lodash/uniq.js';
import type { Cache } from '@cardano-sdk/util';
import type { Responses } from '@blockfrost/blockfrost-js';
import type { Schemas } from '@blockfrost/blockfrost-js/lib/types/open-api';
type WithCertIndex<T> = T & { cert_index: number };
export const DB_MAX_SAFE_INTEGER = 2_147_483_647;
type BlockfrostTx = Pick<Responses['address_transactions_content'][0], 'block_height' | 'tx_index'>;
const compareTx = (a: BlockfrostTx, b: BlockfrostTx) => a.block_height - b.block_height || a.tx_index - b.tx_index;
/** Options for fetching transactions with pagination and filtering. */
interface FetchTransactionsOptions {
/** Pagination options for controlling page size and order */
pagination?: {
/** Number of results per page */
count: number;
/** Sort order (ascending or descending) */
order?: 'asc' | 'desc';
/** Page number to fetch */
page: number;
};
/** Block range filters for limiting results by block height */
blockRange?: {
/** Lower bound for block height (inclusive) */
lowerBound?: number;
/** Upper bound for block height (inclusive) */
upperBound?: number;
};
/** Maximum number of transactions to fetch across all pages */
limit?: number;
}
interface BlockfrostChainHistoryProviderOptions {
queryTxsByCredentials?: boolean;
}
interface BlockfrostChainHistoryProviderDependencies {
cache: Cache<Cardano.HydratedTx>;
client: BlockfrostClient;
networkInfoProvider: NetworkInfoProvider;
logger: Logger;
}
export class BlockfrostChainHistoryProvider extends BlockfrostProvider implements ChainHistoryProvider {
private readonly cache: Cache<Cardano.HydratedTx>;
private networkInfoProvider: NetworkInfoProvider;
// Feature flag to enable credential-based transaction fetching (used in transactionsByAddresses)
protected readonly queryTxsByCredentials: boolean;
// Overload 1: Old signature (backward compatibility)
constructor(dependencies: BlockfrostChainHistoryProviderDependencies);
// Overload 2: New signature with options
constructor(options: BlockfrostChainHistoryProviderOptions, dependencies: BlockfrostChainHistoryProviderDependencies);
// Implementation signature
constructor(
optionsOrDependencies: BlockfrostChainHistoryProviderOptions | BlockfrostChainHistoryProviderDependencies,
maybeDependencies?: BlockfrostChainHistoryProviderDependencies
) {
// Detect which overload was used
const isOldSignature = 'cache' in optionsOrDependencies;
const options = isOldSignature ? {} : (optionsOrDependencies as BlockfrostChainHistoryProviderOptions);
const dependencies = isOldSignature
? (optionsOrDependencies as BlockfrostChainHistoryProviderDependencies)
: maybeDependencies!;
super(dependencies.client, dependencies.logger);
this.cache = dependencies.cache;
this.networkInfoProvider = dependencies.networkInfoProvider;
this.queryTxsByCredentials = options.queryTxsByCredentials ?? false;
}
protected async fetchRedeemers({
hash,
redeemer_count
}: Responses['tx_content']): Promise<Cardano.Redeemer[] | undefined> {
if (!redeemer_count) return;
return this.request<Responses['tx_content_redeemers']>(`txs/${hash}/redeemers`).then((response) =>
response.map(
({ purpose, script_hash, unit_mem, unit_steps, tx_index }): Cardano.Redeemer => ({
data: Buffer.from(script_hash),
executionUnits: {
memory: Number.parseInt(unit_mem),
steps: Number.parseInt(unit_steps)
},
index: tx_index,
purpose: ((): Cardano.Redeemer['purpose'] => {
switch (purpose) {
case 'cert':
return Cardano.RedeemerPurpose.certificate;
case 'reward':
return Cardano.RedeemerPurpose.withdrawal;
case 'mint':
return Cardano.RedeemerPurpose.mint;
case 'spend':
return Cardano.RedeemerPurpose.spend;
default:
return purpose;
}
})()
})
)
);
}
protected async fetchWithdrawals({
withdrawal_count,
hash
}: Responses['tx_content']): Promise<Cardano.Withdrawal[] | undefined> {
if (!withdrawal_count) return;
return this.request<Responses['tx_content_withdrawals']>(`txs/${hash}/withdrawals`).then((response) =>
response.map(
({ address, amount }): Cardano.Withdrawal => ({
quantity: BigInt(amount),
stakeAddress: Cardano.RewardAccount(address)
})
)
);
}
/** This method gathers mints by finding the amounts that doesn't exist in 'inputs' but exist in 'outputs'. */
protected gatherMintsFromUtxos(
{ asset_mint_or_burn_count }: Responses['tx_content'],
{ inputs, outputs }: Responses['tx_content_utxo']
): Cardano.TokenMap | undefined {
if (!asset_mint_or_burn_count) return;
const outputAmounts = outputs.flatMap((o) => o.amount);
const inputAmounts = inputs.flatMap((i) => i.amount);
const amountDifference = outputAmounts.filter(
(amount1) => !inputAmounts.some((amount2) => amount1.unit === amount2.unit)
);
return new Map(amountDifference.map((amount) => [Cardano.AssetId(amount.unit), BigInt(amount.quantity)]));
}
protected async fetchPoolRetireCerts(hash: string): Promise<WithCertIndex<Cardano.PoolRetirementCertificate>[]> {
return this.request<Responses['tx_content_pool_retires']>(`txs/${hash}/pool_retires`).then((response) =>
response.map(({ pool_id, retiring_epoch, cert_index }) => ({
__typename: Cardano.CertificateType.PoolRetirement,
cert_index,
epoch: Cardano.EpochNo(retiring_epoch),
poolId: Cardano.PoolId(pool_id)
}))
);
}
protected async fetchPoolUpdateCerts(hash: string): Promise<WithCertIndex<Cardano.PoolRegistrationCertificate>[]> {
return this.request<Responses['tx_content_pool_certs']>(`txs/${hash}/pool_updates`).then((response) =>
response.map(({ pool_id, cert_index, fixed_cost, margin_cost, pledge, reward_account, vrf_key }) => ({
__typename: Cardano.CertificateType.PoolRegistration,
cert_index,
poolId: Cardano.PoolId(pool_id),
poolParameters: {
cost: BigInt(fixed_cost),
id: pool_id as Cardano.PoolId,
margin: Cardano.FractionUtils.toFraction(margin_cost),
owners: [],
pledge: BigInt(pledge),
relays: [],
rewardAccount: reward_account as Cardano.RewardAccount,
vrf: vrf_key as Cardano.VrfVkHex
}
}))
);
}
async fetchCBOR(hash: string): Promise<string> {
return this.request<Responses['tx_content_cbor']>(`txs/${hash}/cbor`)
.then((response) => {
if (response) return response.cbor;
throw new Error('CBOR is null');
})
.catch((_error) => {
throw new Error('CBOR fetch failed');
});
}
protected async fetchDetailsFromCBOR(hash: string) {
return this.fetchCBOR(hash)
.then((cbor) => {
const tx = Serialization.Transaction.fromCbor(Serialization.TxCBOR(cbor)).toCore();
this.logger.debug('Fetched details from CBOR for tx', hash);
return tx;
})
.catch((error) => {
this.logger.warn('Failed to fetch details from CBOR for tx', hash, error);
return null;
});
}
protected async fetchMirCerts(hash: string): Promise<WithCertIndex<Cardano.MirCertificate>[]> {
return this.request<Responses['tx_content_mirs']>(`txs/${hash}/mirs`).then((response) =>
response.map(({ address, amount, cert_index, pot }) => ({
__typename: Cardano.CertificateType.MIR,
cert_index,
kind: Cardano.MirCertificateKind.ToStakeCreds,
pot: pot === 'reserve' ? Cardano.MirCertificatePot.Reserves : Cardano.MirCertificatePot.Treasury,
quantity: BigInt(amount),
rewardAccount: Cardano.RewardAccount(address)
}))
);
}
protected async fetchStakeCerts(hash: string): Promise<WithCertIndex<Cardano.StakeAddressCertificate>[]> {
return this.request<Responses['tx_content_stake_addr']>(`txs/${hash}/stakes`).then((response) =>
response.map(({ address, cert_index, registration }) => ({
__typename: registration
? Cardano.CertificateType.StakeRegistration
: Cardano.CertificateType.StakeDeregistration,
cert_index,
stakeCredential: {
hash: Cardano.RewardAccount.toHash(Cardano.RewardAccount(address)),
type: Cardano.CredentialType.KeyHash
}
}))
);
}
protected async fetchDelegationCerts(hash: string): Promise<WithCertIndex<Cardano.StakeDelegationCertificate>[]> {
return this.request<Responses['tx_content_delegations']>(`txs/${hash}/delegations`).then((response) =>
response.map(({ address, pool_id, cert_index }) => ({
__typename: Cardano.CertificateType.StakeDelegation,
cert_index,
poolId: Cardano.PoolId(pool_id),
stakeCredential: {
hash: Cardano.RewardAccount.toHash(Cardano.RewardAccount(address)),
type: Cardano.CredentialType.KeyHash
}
}))
);
}
protected async fetchCertificates({
pool_retire_count,
pool_update_count,
mir_cert_count,
stake_cert_count,
delegation_count,
hash
}: Responses['tx_content']): Promise<Cardano.Certificate[] | undefined> {
if (pool_retire_count + pool_update_count + mir_cert_count + stake_cert_count + delegation_count === 0) return;
return Promise.all([
pool_retire_count ? this.fetchPoolRetireCerts(hash) : [],
pool_update_count ? this.fetchPoolUpdateCerts(hash) : [],
mir_cert_count ? this.fetchMirCerts(hash) : [],
stake_cert_count ? this.fetchStakeCerts(hash) : [],
delegation_count ? this.fetchDelegationCerts(hash) : []
]).then((results) =>
results
.flat()
.sort((a, b) => b.cert_index - a.cert_index)
.map((cert) => cert as Cardano.Certificate)
);
}
protected async fetchJsonMetadataAsAuxiliaryData(txHash: string): Promise<Cardano.AuxiliaryData | undefined> {
const UNDEFINED = undefined;
return this.request<Responses['tx_content_metadata']>(`txs/${txHash}/metadata`)
.then((m) => {
const metadata = blockfrostMetadataToTxMetadata(m);
return metadata && metadata.size > 0
? {
blob: metadata
}
: UNDEFINED;
})
.catch((error) => {
Iif (isBlockfrostNotFoundError(error)) {
return UNDEFINED;
}
throw error;
});
}
// eslint-disable-next-line unicorn/consistent-function-scoping
protected parseValidityInterval = (num: string | null) => Cardano.Slot(Number.parseInt(num || '')) || undefined;
protected async fetchEpochNo(slotNo: Cardano.Slot) {
const calc = await this.networkInfoProvider.eraSummaries().then(createSlotEpochCalc);
return calc(slotNo);
}
protected async fetchEpochParameters(epochNo: Cardano.EpochNo): Promise<Schemas['epoch_param_content']> {
return await this.request<Responses['epoch_param_content']>(`epochs/${epochNo}/parameters`);
}
protected async processCertificates(
txContent: Schemas['tx_content'],
certificates?: Cardano.Certificate[]
): Promise<Cardano.Certificate[] | undefined> {
if (!certificates) return;
const epochNo = await this.fetchEpochNo(Cardano.Slot(txContent.slot));
const { pool_deposit, key_deposit } = await this.fetchEpochParameters(epochNo);
return certificates.map((c) => {
const cert = omit(c, 'cert_index') as Cardano.Certificate;
switch (cert.__typename) {
case Cardano.CertificateType.PoolRegistration: {
cert.poolParameters.owners = [];
cert.poolParameters.relays = [];
const deposit =
txContent.deposit === undefined || txContent.deposit === '' || txContent.deposit === '0'
? 0n
: BigInt(pool_deposit);
delete cert.poolParameters.metadataJson;
return { ...cert, deposit };
}
case Cardano.CertificateType.StakeRegistration: {
const deposit = BigInt(key_deposit);
return { ...cert, __typename: Cardano.CertificateType.Registration, deposit };
}
case Cardano.CertificateType.StakeDeregistration: {
const deposit = BigInt(key_deposit);
return { ...cert, __typename: Cardano.CertificateType.Unregistration, deposit };
}
default:
return cert;
}
});
}
protected async transactionDetailsUsingAPIs(txContent: Responses['tx_content']): Promise<Cardano.HydratedTx> {
const id = Cardano.TransactionId(txContent.hash);
const [certificates, withdrawals, utxos, auxiliaryData] = await Promise.all([
this.fetchCertificates(txContent),
this.fetchWithdrawals(txContent),
this.fetchUtxos(id),
this.fetchJsonMetadataAsAuxiliaryData(id)
]);
const { inputs, outputs, collaterals } = this.transactionUtxos(utxos);
const mintPreOrder = this.gatherMintsFromUtxos(txContent, utxos);
const mint = mintPreOrder ? new Map([...mintPreOrder].sort()) : mintPreOrder;
const inputSource: Cardano.InputSource = txContent.valid_contract
? Cardano.InputSource.inputs
: Cardano.InputSource.collaterals;
const body: Cardano.HydratedTxBody = this.mapTxBody(
{
certificates: await this.processCertificates(txContent, certificates),
collateralReturn: undefined,
collaterals,
fee: BigInt(txContent.fees),
inputs,
mint,
outputs,
proposalProcedures: undefined,
validityInterval: {
invalidBefore: this.parseValidityInterval(txContent.invalid_before),
invalidHereafter: this.parseValidityInterval(txContent.invalid_hereafter)
},
votingProcedures: undefined,
withdrawals
},
inputSource
);
return {
auxiliaryData,
blockHeader: this.mapBlockHeader(txContent),
body,
id,
index: txContent.index,
inputSource,
txSize: txContent.size,
witness: this.witnessFromRedeemers(await this.fetchRedeemers(txContent))
};
}
private witnessFromRedeemers(redeemers: Cardano.Redeemer[] | undefined): Cardano.Witness {
// Although cbor has the data, this stub is used for compatibility with DbSyncChainHistoryProvider
const stubRedeemerData = Buffer.from('not implemented');
if (redeemers) {
for (const redeemer of redeemers) {
redeemer.data = stubRedeemerData;
}
}
return {
redeemers,
signatures: new Map() // available in cbor, but skipped for compatibility with DbSyncChainHistoryProvider
};
}
protected async transactionDetailsUsingCBOR(
txContent: Responses['tx_content']
): Promise<Cardano.HydratedTx | undefined> {
const id = Cardano.TransactionId(txContent.hash);
const txFromCBOR = await this.fetchDetailsFromCBOR(id);
if (!txFromCBOR) return;
const utxos = await this.request<Responses['tx_content_utxo']>(`txs/${id}/utxos`);
// We can't use txFromCBOR.body.inputs since it misses HydratedTxIn.address
const { inputs, outputs, collaterals } = this.transactionUtxos(utxos, txFromCBOR);
// txFromCBOR.isValid can be also be used
const inputSource: Cardano.InputSource = txContent.valid_contract
? Cardano.InputSource.inputs
: Cardano.InputSource.collaterals;
const body: Cardano.HydratedTxBody = this.mapTxBody(
{
certificates: await this.processCertificates(txContent, txFromCBOR.body.certificates),
collateralReturn: txFromCBOR.body.collateralReturn,
collaterals,
fee: txFromCBOR.body.fee,
inputs,
mint: txFromCBOR.body.mint ? new Map([...txFromCBOR.body.mint].sort()) : undefined,
outputs,
proposalProcedures: txFromCBOR.body.proposalProcedures,
validityInterval: txFromCBOR.body.validityInterval
? txFromCBOR.body.validityInterval
: { invalidBefore: undefined, invalidHereafter: undefined },
votingProcedures: txFromCBOR.body.votingProcedures,
withdrawals: txFromCBOR.body.withdrawals
},
inputSource
);
return {
auxiliaryData: txFromCBOR.auxiliaryData,
blockHeader: this.mapBlockHeader(txContent),
body,
id,
index: txContent.index,
inputSource,
txSize: txContent.size,
witness: this.witnessFromRedeemers(txFromCBOR.witness.redeemers)
};
}
protected async fetchTransaction(txId: Cardano.TransactionId): Promise<Cardano.HydratedTx> {
try {
const txContent = await this.request<Responses['tx_content']>(`txs/${txId.toString()}`);
return (await this.transactionDetailsUsingCBOR(txContent)) ?? (await this.transactionDetailsUsingAPIs(txContent));
} catch (error) {
throw this.toProviderError(error);
}
}
private transactionUtxos(utxoResponse: Responses['tx_content_utxo'], txContent?: Cardano.Tx) {
const collaterals = utxoResponse.inputs.filter((input) => input.collateral).map(BlockfrostToCore.hydratedTxIn);
const inputs = utxoResponse.inputs
.filter((input) => !input.collateral && !input.reference)
.map(BlockfrostToCore.hydratedTxIn);
const outputPromises: Cardano.TxOut[] = utxoResponse.outputs
.filter((output) => !output.collateral)
.map((output) => {
const foundScript = txContent?.body.outputs.find((o) => o.address === output.address);
return BlockfrostToCore.txOut(output, foundScript);
});
return { collaterals, inputs, outputs: outputPromises };
}
public async blocksByHashes({ ids }: BlocksByIdsArgs): Promise<Cardano.ExtendedBlockInfo[]> {
try {
const responses = await Promise.all(
ids.map((id) => this.request<Responses['block_content']>(`blocks/${id.toString()}`))
);
return responses.map((response) => {
Iif (!response.epoch || !response.epoch_slot || !response.height || !response.slot || !response.block_vrf) {
throw new ProviderError(ProviderFailure.Unknown, null, 'Queried unsupported block');
}
return {
confirmations: response.confirmations,
date: new Date(response.time * 1000),
epoch: Cardano.EpochNo(response.epoch),
epochSlot: response.epoch_slot,
fees: BigInt(response.fees || '0'),
header: {
blockNo: Cardano.BlockNo(response.height),
hash: Cardano.BlockId(response.hash),
slot: Cardano.Slot(response.slot)
},
nextBlock: response.next_block ? Cardano.BlockId(response.next_block) : undefined,
previousBlock: response.previous_block ? Cardano.BlockId(response.previous_block) : undefined,
size: Cardano.BlockSize(response.size),
slotLeader: Cardano.SlotLeader(response.slot_leader),
totalOutput: BigInt(response.output || '0'),
txCount: response.tx_count,
vrf: Cardano.VrfVkBech32(response.block_vrf)
};
});
} catch (error) {
throw this.toProviderError(error);
}
}
public async transactionsByHashes({ ids }: TransactionsByIdsArgs): Promise<Cardano.HydratedTx[]> {
return Promise.all(
ids.map(async (id) => {
const cached = await this.cache.get(id);
if (cached) return cached;
try {
const fetchedTransaction = await this.fetchTransaction(id);
void this.cache.set(id, fetchedTransaction);
return fetchedTransaction;
} catch (error) {
throw this.toProviderError(error);
}
})
);
}
/** Processes and filters transaction results, returning deduplicated and sorted transaction IDs. */
private processTransactionResults(
transactions: BlockfrostTransactionContent[],
blockRange: { lowerBound?: number; upperBound?: number },
order?: 'asc' | 'desc'
): Cardano.TransactionId[] {
const lowerBound = blockRange.lowerBound ?? 0;
const upperBound = blockRange.upperBound ?? DB_MAX_SAFE_INTEGER;
return uniq(
transactions
.filter(({ block_height }) => block_height >= lowerBound && block_height <= upperBound)
.sort(order === 'desc' ? (a, b) => compareTx(b, a) : compareTx)
.map(({ tx_hash }) => Cardano.TransactionId(tx_hash))
);
}
/** Executes the legacy per-address transaction fetching implementation. */
private async fetchTransactionsPerAddress(
addresses: Cardano.PaymentAddress[],
pagination: TransactionsByAddressesArgs['pagination'],
blockRange: TransactionsByAddressesArgs['blockRange']
): Promise<BlockfrostTransactionContent[]> {
const paginationOptions = pagination
? {
count: pagination.limit,
order: pagination.order,
page: (pagination.startAt + pagination.limit) / pagination.limit
}
: undefined;
const limit = pagination?.limit ?? DB_MAX_SAFE_INTEGER;
const addressTransactions = await Promise.all(
addresses.map((address) =>
this.fetchTransactionsByAddress(address, {
blockRange,
limit,
pagination: paginationOptions
})
)
);
return addressTransactions.flat();
}
/** Logs information about skipped addresses. */
private logSkippedAddresses(skippedAddresses: {
byron: Cardano.PaymentAddress[];
pointer: Cardano.PaymentAddress[];
}): void {
Iif (skippedAddresses.byron.length > 0) {
this.logger.info(
`Found ${skippedAddresses.byron.length} Byron address(es), falling back to per-address fetching`
);
}
Iif (skippedAddresses.pointer.length > 0) {
this.logger.info(
`Found ${skippedAddresses.pointer.length} Pointer address(es), falling back to per-address fetching`
);
}
}
/** Logs minimization statistics. */
private logMinimizationStats(
totalAddresses: number,
minimized: { paymentCredentials: Map<unknown, unknown>; rewardAccounts: Map<unknown, unknown> },
skippedAddresses: { byron: Cardano.PaymentAddress[]; pointer: Cardano.PaymentAddress[] }
): void {
const paymentCredCount = minimized.paymentCredentials.size;
const rewardAccountCount = minimized.rewardAccounts.size;
const skippedCount = skippedAddresses.byron.length + skippedAddresses.pointer.length;
const totalQueries = paymentCredCount + rewardAccountCount + skippedCount;
this.logger.debug(
`Minimized ${totalAddresses} address(es) to ${totalQueries} query/queries: ` +
`${paymentCredCount} payment credential(s), ${rewardAccountCount} reward account(s), ${skippedCount} skipped address(es)`
);
}
/** Fetches transactions for all payment credentials in parallel. */
private async fetchAllByPaymentCredentials(
credentials: Map<Cardano.PaymentCredential, Cardano.PaymentAddress[]>,
pagination?: { count: number; order?: 'asc' | 'desc'; page: number },
blockRange?: { lowerBound?: number; upperBound?: number },
limit?: number
): Promise<BlockfrostTransactionContent[]> {
const results = await Promise.all(
[...credentials.keys()].map((credential) =>
this.fetchTransactionsByPaymentCredential(credential, { blockRange, limit, pagination })
)
);
return results.flat();
}
/** Fetches transactions for all reward accounts in parallel. */
private async fetchAllByRewardAccounts(
rewardAccounts: Map<Cardano.RewardAccount, Cardano.PaymentAddress[]>,
pagination?: { count: number; order?: 'asc' | 'desc'; page: number },
blockRange?: { lowerBound?: number; upperBound?: number },
limit?: number
): Promise<BlockfrostTransactionContent[]> {
const results = await Promise.all(
[...rewardAccounts.keys()].map((rewardAccount) =>
this.fetchTransactionsByRewardAccount(rewardAccount, { blockRange, limit, pagination })
)
);
return results.flat();
}
/** Fetches transactions for skipped addresses (Byron and Pointer). */
private async fetchSkippedAddresses(
skippedAddresses: { byron: Cardano.PaymentAddress[]; pointer: Cardano.PaymentAddress[] },
pagination?: { count: number; order?: 'asc' | 'desc'; page: number },
blockRange?: { lowerBound?: number; upperBound?: number },
limit?: number
): Promise<BlockfrostTransactionContent[]> {
const allSkippedAddresses = [...skippedAddresses.byron, ...skippedAddresses.pointer];
const results = await Promise.all(
allSkippedAddresses.map((address) => this.fetchTransactionsByAddress(address, { blockRange, limit, pagination }))
);
return results.flat();
}
/** Executes the optimized credential-based transaction fetching implementation. */
private async fetchTransactionsByCredentials(
addresses: Cardano.PaymentAddress[],
pagination: TransactionsByAddressesArgs['pagination'],
blockRange: TransactionsByAddressesArgs['blockRange']
): Promise<BlockfrostTransactionContent[]> {
const addressGroups = extractCredentials(addresses);
this.logSkippedAddresses(addressGroups.skippedAddresses);
const minimized = minimizeCredentialSet({
paymentCredentials: addressGroups.paymentCredentials,
rewardAccounts: addressGroups.rewardAccounts
});
this.logMinimizationStats(addresses.length, minimized, addressGroups.skippedAddresses);
const paginationOptions = pagination
? {
count: Math.min(pagination.limit, 100), // Cap at Blockfrost's max page size
order: pagination.order ?? 'asc',
page: (pagination.startAt + pagination.limit) / pagination.limit
}
: undefined;
const blockRangeOptions = { lowerBound: blockRange?.lowerBound, upperBound: blockRange?.upperBound };
const limit = pagination?.limit ?? DB_MAX_SAFE_INTEGER;
const [paymentTxs, rewardAccountTxs, skippedAddressTxs] = await Promise.all([
this.fetchAllByPaymentCredentials(minimized.paymentCredentials, paginationOptions, blockRangeOptions, limit),
this.fetchAllByRewardAccounts(minimized.rewardAccounts, paginationOptions, blockRangeOptions, limit),
this.fetchSkippedAddresses(addressGroups.skippedAddresses, paginationOptions, blockRangeOptions, limit)
]);
return [...paymentTxs, ...rewardAccountTxs, ...skippedAddressTxs];
}
public async transactionsByAddresses({
addresses,
pagination,
blockRange
}: TransactionsByAddressesArgs): Promise<Paginated<Cardano.HydratedTx>> {
this.logger.debug(`transactionsByAddresses: ${JSON.stringify(blockRange)} ${JSON.stringify(addresses)}`);
try {
const allTransactions = this.queryTxsByCredentials
? await this.fetchTransactionsByCredentials(addresses, pagination, blockRange)
: await this.fetchTransactionsPerAddress(addresses, pagination, blockRange);
const dedupedSortedTransactionsIds = this.processTransactionResults(
allTransactions,
{ lowerBound: blockRange?.lowerBound, upperBound: blockRange?.upperBound },
pagination?.order
);
const pageResults = await this.transactionsByHashes({ ids: dedupedSortedTransactionsIds });
return { pageResults, totalResultCount: dedupedSortedTransactionsIds.length };
} catch (error) {
throw this.toProviderError(error);
}
}
private mapTxBody(
{
collateralReturn,
collaterals,
fee,
inputs,
outputs,
mint,
proposalProcedures,
validityInterval,
votingProcedures,
withdrawals,
certificates
}: Cardano.HydratedTxBody,
inputSource: Cardano.InputSource
) {
return {
...(inputSource === Cardano.InputSource.collaterals
? {
collateralReturn: outputs.length > 0 ? outputs[0] : undefined,
collaterals: inputs,
fee: BigInt(0),
inputs: [],
outputs: [],
totalCollateral: fee
}
: {
collateralReturn: collateralReturn ?? undefined,
collaterals,
fee,
inputs,
outputs
}),
certificates,
mint,
proposalProcedures,
validityInterval,
votingProcedures,
withdrawals
};
}
private mapBlockHeader({ block, block_height, slot }: Responses['tx_content']): Cardano.PartialBlockHeader {
return {
blockNo: Cardano.BlockNo(block_height),
hash: Cardano.BlockId(block),
slot: Cardano.Slot(slot)
};
}
private fetchUtxos(id: Cardano.TransactionId): Promise<Schemas['tx_content_utxo']> {
return this.request<Responses['tx_content_utxo']>(`txs/${id}/utxos`);
}
/**
* Helper to build query string with pagination and block range filters.
*
* @param baseEndpoint - The base endpoint (e.g., "addresses/xyz/transactions")
* @param paginationQueryString - Pagination query string from fetchSequentially
* @param blockRange - Optional block range filters
* @param blockRange.lowerBound - Lower bound for block range
* @param blockRange.upperBound - Upper bound for block range
* @returns Complete query string with all parameters
*/
private buildTransactionQueryString(
baseEndpoint: string,
paginationQueryString: string,
blockRange?: { lowerBound?: number; upperBound?: number }
): string {
let queryString = `${baseEndpoint}?${paginationQueryString}`;
if (blockRange?.lowerBound) queryString += `&from=${blockRange.lowerBound.toString()}`;
if (blockRange?.upperBound) queryString += `&to=${blockRange.upperBound.toString()}`;
return queryString;
}
/**
* Common method to fetch transactions with pagination and limits.
*
* @param endpoint - The base endpoint (e.g., 'addresses/xyz' or 'accounts/stake123')
* @param options - Options for pagination, block range, and limit
* @returns Promise resolving to array of transaction contents
*/
private async fetchTransactionsWithPagination(
endpoint: string,
options: FetchTransactionsOptions
): Promise<BlockfrostTransactionContent[]> {
const limit = options.limit ?? DB_MAX_SAFE_INTEGER;
return fetchSequentially<{ tx_hash: string; tx_index: number; block_height: number }, BlockfrostTransactionContent>(
{
haveEnoughItems: options.blockRange?.lowerBound
? (transactions) =>
(transactions.length > 0 &&
transactions[transactions.length - 1].block_height < options.blockRange!.lowerBound!) ||
transactions.length >= limit
: (transactions) => transactions.length >= limit,
paginationOptions: options.pagination,
request: (paginationQueryString) => {
const queryString = this.buildTransactionQueryString(
`${endpoint}/transactions`,
paginationQueryString,
options.blockRange
);
return this.request<Responses['address_transactions_content']>(queryString);
}
}
);
}
/**
* Fetches transactions for a given address using the fetchSequentially pattern.
*
* @param address - The address to fetch transactions for
* @param options - Options for pagination, block range, and limit
* @returns Promise resolving to array of transaction contents
*/
private async fetchTransactionsByAddress(
address: Cardano.PaymentAddress,
options: FetchTransactionsOptions
): Promise<BlockfrostTransactionContent[]> {
return this.fetchTransactionsWithPagination(`addresses/${address}`, options);
}
/**
* Fetches transactions for a payment credential (bech32: addr_vkh or script).
*
* @param credential - Payment credential as bech32 string
* @param options - Options for pagination, block range, and limit
* @returns Promise resolving to array of transaction contents
*/
protected async fetchTransactionsByPaymentCredential(
credential: Cardano.PaymentCredential,
options: FetchTransactionsOptions
): Promise<BlockfrostTransactionContent[]> {
return this.fetchTransactionsWithPagination(`addresses/${credential}`, options);
}
/**
* Fetches transactions for a reward account (stake address, bech32: stake or stake_test).
*
* @param rewardAccount - Reward account (stake address) as bech32 string
* @param options - Options for pagination, block range, and limit
* @returns Promise resolving to array of transaction contents
*/
protected async fetchTransactionsByRewardAccount(
rewardAccount: Cardano.RewardAccount,
options: FetchTransactionsOptions
): Promise<BlockfrostTransactionContent[]> {
// Note: accounts/{stake_address}/transactions returns the same structure as address_transactions_content
return this.fetchTransactionsWithPagination(`accounts/${rewardAccount}`, options);
}
/**
* Merges and deduplicates transaction results from multiple sources (payment credentials, reward accounts, skipped addresses).
*
* @param paymentTxs Transactions from payment credential queries
* @param rewardAccountTxs Transactions from reward account (stake address) queries
* @param skippedAddressTxs Transactions from skipped address queries (Byron, Pointer)
* @param order Sort order (asc or desc)
* @returns Sorted and deduplicated array of transaction IDs
*/
protected mergeAndDeduplicateTransactionResults(
paymentTxs: BlockfrostTransactionContent[],
rewardAccountTxs: BlockfrostTransactionContent[],
skippedAddressTxs: BlockfrostTransactionContent[],
order: 'asc' | 'desc' = 'asc'
): Cardano.TransactionId[] {
const allTransactions = [...paymentTxs, ...rewardAccountTxs, ...skippedAddressTxs];
const sortedTransactions = allTransactions.sort(order === 'desc' ? (a, b) => compareTx(b, a) : compareTx);
return uniq(sortedTransactions.map(({ tx_hash }) => Cardano.TransactionId(tx_hash)));
}
}
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