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initialize-provider.ts
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initialize-provider.ts
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import flatMap from 'lodash/flatMap';
import isEmpty from 'lodash/isEmpty';
import mergeWith from 'lodash/mergeWith';
import { logger, PendingLog } from '@api3/airnode-utilities';
import { go } from '@api3/promise-utils';
import { fetchPendingRequests } from './fetch-pending-requests';
import * as authorizations from '../authorization';
import * as requests from '../../requests';
import * as state from '../../providers/state';
import * as templates from '../templates';
import * as transactionCounts from '../transaction-counts';
import * as verification from '../verification';
import { buildEVMProvider } from '../evm-provider';
import { AuthorizationByRequestId, EVMProviderState, LogsData, ProviderState } from '../../types';
type ParallelPromise = Promise<{ readonly id: string; readonly data: any; readonly logs: PendingLog[] }>;
async function fetchSameChainAuthorizations(currentState: ProviderState<EVMProviderState>) {
if (isEmpty(currentState.settings.authorizers.requesterEndpointAuthorizers)) {
return { id: 'authorizations', data: {}, logs: [] };
}
const fetchOptions: authorizations.AirnodeRrpFetchOptions = {
type: 'airnodeRrp',
requesterEndpointAuthorizers: currentState.settings.authorizers.requesterEndpointAuthorizers,
authorizations: currentState.settings.authorizations,
airnodeAddress: currentState.settings.airnodeAddress,
airnodeRrpAddress: currentState.contracts.AirnodeRrp,
provider: currentState.provider,
};
const [logs, res] = await authorizations.fetch(currentState.requests.apiCalls, fetchOptions);
return { id: 'authorizations', data: res, logs };
}
async function fetchSameChainErc721Authorizations(currentState: ProviderState<EVMProviderState>) {
const promises = currentState.settings.authorizers.requesterAuthorizersWithErc721.map(async (authorizer) => {
const fetchOptions: authorizations.Erc721FetchOptions = {
type: 'erc721',
airnodeAddress: currentState.settings.airnodeAddress,
authorizations: currentState.settings.authorizations,
chainId: currentState.settings.chainId,
erc721s: authorizer.erc721s,
provider: currentState.provider,
RequesterAuthorizerWithErc721Address: authorizer.RequesterAuthorizerWithErc721,
};
const result = await authorizations.fetch(currentState.requests.apiCalls, fetchOptions);
return result;
});
const responses = await Promise.all(promises);
const logs = flatMap(responses, (r) => r[0]);
const authorizationStatuses = responses.map((r) => r[1]);
return { id: 'erc721Authorizations', data: authorizationStatuses, logs };
}
async function fetchCrossChainAuthorizations(
currentState: ProviderState<EVMProviderState>,
id: 'crossChainAuthorizations' | 'erc721CrossChainAuthorizations'
) {
let promises: Promise<LogsData<AuthorizationByRequestId>>[];
switch (id) {
case 'crossChainAuthorizations':
promises = currentState.settings.authorizers.crossChainRequesterAuthorizers.map(async (authorizer) => {
const fetchOptions: authorizations.AirnodeRrpFetchOptions = {
type: 'airnodeRrp',
requesterEndpointAuthorizers: authorizer.requesterEndpointAuthorizers,
authorizations: currentState.settings.authorizations,
airnodeAddress: currentState.settings.airnodeAddress,
airnodeRrpAddress: authorizer.contracts.AirnodeRrp,
provider: buildEVMProvider(authorizer.chainProvider.url, authorizer.chainId),
};
const result = await authorizations.fetch(currentState.requests.apiCalls, fetchOptions);
return result;
});
break;
case 'erc721CrossChainAuthorizations':
promises = currentState.settings.authorizers.crossChainRequesterAuthorizersWithErc721.map(async (authorizer) => {
const fetchOptions: authorizations.Erc721FetchOptions = {
type: 'erc721',
airnodeAddress: currentState.settings.airnodeAddress,
authorizations: currentState.settings.authorizations,
chainId: authorizer.chainId,
erc721s: authorizer.erc721s,
provider: buildEVMProvider(authorizer.chainProvider.url, authorizer.chainId),
RequesterAuthorizerWithErc721Address: authorizer.contracts.RequesterAuthorizerWithErc721,
};
const result = await authorizations.fetch(currentState.requests.apiCalls, fetchOptions);
return result;
});
break;
}
const responses = await Promise.all(promises);
const logs = flatMap(responses, (r) => r[0]);
const authorizationStatuses = responses.map((r) => r[1]);
return { id: id, data: authorizationStatuses, logs };
}
async function fetchTransactionCounts(currentState: ProviderState<EVMProviderState>) {
const sponsors = requests.mapUniqueSponsorAddresses(currentState.requests);
const fetchOptions = {
currentBlock: currentState.currentBlock!,
masterHDNode: currentState.masterHDNode,
provider: currentState.provider,
minConfirmations: currentState.settings.minConfirmations,
mayOverrideMinConfirmations: currentState.settings.mayOverrideMinConfirmations,
};
// This should not throw
const [logs, res] = await transactionCounts.fetchBySponsor(sponsors, fetchOptions);
return { id: 'transaction-counts', data: res, logs };
}
export function mergeAuthorizationsByRequestId(authorizations: AuthorizationByRequestId[]): AuthorizationByRequestId {
const merged = mergeWith({}, ...authorizations, (objVal: boolean, srcVal: boolean) => {
// authorized if any authorizer has authorized (logical OR)
if (objVal === true || srcVal === true) {
return true;
} else {
return false;
}
});
return merged;
}
export async function initializeProvider(
initialState: ProviderState<EVMProviderState>
): Promise<ProviderState<EVMProviderState> | null> {
// =================================================================
// STEP 1: Re-instantiate any classes
// =================================================================
const state1 = state.refresh(initialState);
// =================================================================
// STEP 2: Get current block number
// =================================================================
const currentBlock = await state1.provider.getBlockNumber();
const state2 = state.update(state1, { currentBlock });
// =================================================================
// STEP 3: Get the pending actionable items from triggers
// =================================================================
const goGroupedRequests = await go(() => fetchPendingRequests(state2));
if (!goGroupedRequests.success) {
logger.error('Unable to get pending requests', goGroupedRequests.error);
return null;
}
const apiCalls = goGroupedRequests.data.apiCalls;
const withdrawals = goGroupedRequests.data.withdrawals;
logger.info(`Pending requests: ${apiCalls.length} API call(s), ${withdrawals.length} withdrawal(s)`);
const state3 = state.update(state2, { requests: goGroupedRequests.data });
// =================================================================
// STEP 4: Fetch and apply templates to API calls
// =================================================================
const templateFetchOptions = {
airnodeRrpAddress: state3.contracts.AirnodeRrp,
provider: state3.provider,
configTemplates: state3.config!.templates,
airnodeAddress: state3.settings.airnodeAddress,
};
// This should not throw
const [templateFetchLogs, templatesById] = await templates.fetch(state3.requests.apiCalls, templateFetchOptions);
logger.logPending(templateFetchLogs);
const [templApplicationLogs, templatedApiCalls] = templates.mergeApiCallsWithTemplates(
state3.requests.apiCalls,
templatesById
);
logger.logPending(templApplicationLogs);
const state4 = state.update(state3, {
requests: { ...state3.requests, apiCalls: templatedApiCalls },
});
// =================================================================
// STEP 5: Verify requests
// =================================================================
const [verifyRrpTriggersLogs, verifiedApiCallsForRrpTriggers] = verification.verifyRrpTriggers(
state4.requests.apiCalls,
state4.config!.triggers.rrp
);
logger.logPending(verifyRrpTriggersLogs);
const state5 = state.update(state4, {
requests: {
...state4.requests,
apiCalls: verifiedApiCallsForRrpTriggers,
},
});
// =================================================================
// STEP 6: Fetch authorizations and transaction counts
// =================================================================
// NOTE: None of these promises can fail otherwise Promise.all will reject
// If all authorizers arrays are empty then all requests are authorized
const allAuthorizersEmpty = Object.values(state5.settings.authorizers).every((arr) => isEmpty(arr));
const authAndTxCountPromises: readonly ParallelPromise[] = allAuthorizersEmpty
? [fetchTransactionCounts(state5)]
: [
fetchTransactionCounts(state5),
fetchSameChainAuthorizations(state5),
fetchSameChainErc721Authorizations(state5),
fetchCrossChainAuthorizations(state5, 'crossChainAuthorizations'),
fetchCrossChainAuthorizations(state5, 'erc721CrossChainAuthorizations'),
];
const authAndTxResults = await Promise.all(authAndTxCountPromises);
// These promises can resolve in any order, so we need to find each one by it's key
const txCountRes = authAndTxResults.find((r) => r.id === 'transaction-counts')!;
logger.logPending(txCountRes.logs);
const transactionCountsBySponsorAddress = txCountRes.data!;
let mergedAuthorizationsByRequestId: AuthorizationByRequestId;
if (allAuthorizersEmpty) {
logger.info('Authorizing all requests because all authorizer arrays are empty');
mergedAuthorizationsByRequestId = Object.fromEntries(
state5.requests.apiCalls.map((pendingApiCall) => [pendingApiCall.id, true])
);
} else {
const authRes = authAndTxResults.find((r) => r.id === 'authorizations')!;
logger.logPending(authRes.logs);
const crossAuthRes = authAndTxResults.find((r) => r.id === 'crossChainAuthorizations')!;
logger.logPending(crossAuthRes.logs);
const erc721AuthRes = authAndTxResults.find((r) => r.id === 'erc721Authorizations')!;
logger.logPending(erc721AuthRes.logs);
const erc721CrossAuthRes = authAndTxResults.find((r) => r.id === 'erc721CrossChainAuthorizations')!;
logger.logPending(erc721CrossAuthRes.logs);
// Merge authorization statuses
const authorizationsByRequestId: AuthorizationByRequestId = authRes.data!;
const crossAuthorizationsByRequestId: AuthorizationByRequestId[] = crossAuthRes.data!;
const erc721AuthorizationsByRequestId: AuthorizationByRequestId[] = erc721AuthRes.data!;
const erc721crossAuthorizationsByRequestId: AuthorizationByRequestId[] = erc721CrossAuthRes.data!;
mergedAuthorizationsByRequestId = mergeAuthorizationsByRequestId([
authorizationsByRequestId,
...crossAuthorizationsByRequestId,
...erc721AuthorizationsByRequestId,
...erc721crossAuthorizationsByRequestId,
]);
}
const state6 = state.update(state5, { transactionCountsBySponsorAddress });
// =================================================================
// STEP 7: Apply authorization statuses to requests
// =================================================================
const [authLogs, authorizedApiCalls] = authorizations.mergeAuthorizations(
state5.requests.apiCalls,
mergedAuthorizationsByRequestId
);
logger.logPending(authLogs);
const state7 = state.update(state6, {
requests: { ...state6.requests, apiCalls: authorizedApiCalls },
});
return state7;
}