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import * as Crypto from '@cardano-sdk/crypto';
import { BlockfrostProvider, BlockfrostProviderDependencies } from '../../util/BlockfrostProvider/BlockfrostProvider';
import {
BlockfrostToCore,
BlockfrostTransactionContent,
blockfrostMetadataToTxMetadata,
blockfrostToProviderError,
fetchByAddressSequentially,
isBlockfrostNotFoundError
} from '../../util';
import {
BlocksByIdsArgs,
Cardano,
ChainHistoryProvider,
NetworkInfoProvider,
Paginated,
ProviderError,
ProviderFailure,
Serialization,
TransactionsByAddressesArgs,
TransactionsByIdsArgs,
createSlotEpochCalc
} from '@cardano-sdk/core';
import { DB_MAX_SAFE_INTEGER } from '../DbSyncChainHistory/queries';
import { Responses } from '@blockfrost/blockfrost-js';
import { Schemas } from '@blockfrost/blockfrost-js/lib/types/open-api';
import omit from 'lodash/omit.js';
type WithCertIndex<T> = T & { cert_index: number };
export interface BlockfrostChainHistoryProviderDependencies extends BlockfrostProviderDependencies {
networkInfoProvider: NetworkInfoProvider;
}
export class BlockfrostChainHistoryProvider extends BlockfrostProvider implements ChainHistoryProvider {
private networkInfoProvider: NetworkInfoProvider;
constructor({ logger, blockfrost, networkInfoProvider }: BlockfrostChainHistoryProviderDependencies) {
super({ blockfrost, logger });
this.networkInfoProvider = networkInfoProvider;
}
protected async fetchRedeemers({
hash,
redeemer_count
}: Responses['tx_content']): Promise<Cardano.Redeemer[] | undefined> {
Iif (!redeemer_count) return;
return this.blockfrost.txsRedeemers(hash).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> {
Iif (!withdrawal_count) return;
return this.blockfrost.txsWithdrawals(hash).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 {
Iif (!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.blockfrost.txsPoolRetires(hash).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.blockfrost.txsPoolUpdates(hash).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.blockfrost
.instance<Schemas['script_cbor']>(`txs/${hash}/cbor`)
.then((response) => {
Iif (response.body.cbor) return response.body.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.info('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.blockfrost.txsMirs(hash).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.blockfrost.txsStakes(hash).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)) as unknown as Crypto.Hash28ByteBase16,
type: Cardano.CredentialType.KeyHash
}
}))
);
}
protected async fetchDelegationCerts(hash: string): Promise<WithCertIndex<Cardano.StakeDelegationCertificate>[]> {
return this.blockfrost.txsDelegations(hash).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)) as unknown as Crypto.Hash28ByteBase16,
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> {
Iif (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.blockfrost
.txsMetadata(txHash)
.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.blockfrost.epochsParameters(epochNo);
}
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: Schemas['tx_content_utxo'] = (await this.blockfrost.txsUtxos(id)) as Schemas['tx_content_utxo'];
// 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.blockfrost.txs(txId.toString());
return (await this.transactionDetailsUsingCBOR(txContent)) ?? (await this.transactionDetailsUsingAPIs(txContent));
} catch (error) {
throw blockfrostToProviderError(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.blockfrost.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 blockfrostToProviderError(error);
}
}
public async transactionsByHashes({ ids }: TransactionsByIdsArgs): Promise<Cardano.HydratedTx[]> {
try {
return Promise.all(ids.map((id) => this.fetchTransaction(id)));
} catch (error) {
throw blockfrostToProviderError(error);
}
}
// eslint-disable-next-line sonarjs/cognitive-complexity
public async transactionsByAddresses({
addresses,
pagination,
blockRange
}: TransactionsByAddressesArgs): Promise<Paginated<Cardano.HydratedTx>> {
this.logger.info(`transactionsByAddresses: ${JSON.stringify(blockRange)} ${JSON.stringify(addresses)}`);
try {
const lowerBound = blockRange?.lowerBound ?? 0;
const upperBound = blockRange?.upperBound ?? DB_MAX_SAFE_INTEGER;
const addressTransactions = await Promise.all(
addresses.map(async (address) =>
fetchByAddressSequentially<
{ tx_hash: string; tx_index: number; block_height: number },
BlockfrostTransactionContent
>({
address,
haveEnoughItems: blockRange?.lowerBound
? (transactions) =>
transactions.length > 0 &&
transactions[transactions.length - 1].block_height < blockRange!.lowerBound!
: undefined,
request: (addr: Cardano.PaymentAddress, paginationOptions) =>
this.blockfrost.addressesTransactions(addr.toString(), paginationOptions, {
from: blockRange?.lowerBound ? blockRange?.lowerBound.toString() : undefined,
to: blockRange?.upperBound ? blockRange?.upperBound.toString() : undefined
})
})
)
);
const allTransactions = addressTransactions.flat(1);
const ids = allTransactions
.filter(({ block_height }) => block_height >= lowerBound && block_height <= upperBound)
.sort((a, b) => a.block_height - b.block_height || a.tx_index - b.tx_index)
.map(({ tx_hash }) => Cardano.TransactionId(tx_hash))
.splice(pagination.startAt, pagination.limit);
const pageResults = await this.transactionsByHashes({ ids });
return { pageResults, totalResultCount: allTransactions.length };
} catch (error) {
throw blockfrostToProviderError(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.blockfrost.txsUtxos(id);
}
}
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