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import { IabSnapshotEntity } from "../../approval-engine-2/entity/iab.snapshot.entity.js";
import { AppDataSourceService } from "../../approval-engine-2/domain/data-source.js";
import { autoInjectable, inject, singleton } from "tsyringe";
import { AmountMapper } from "../../commons/mappers/amount.mapper.js";
import { tokens } from "../../registry/tokens.js";
import { SyncSignalEvent } from "../../sync-engine/domain/sync-events.js";
import {
AssetState,
AssetStateChangeLog,
LedgerEventEvaluator,
MarkedStateChangeLog,
MetricStateChangeLog,
} from "../../tr8-script/domain/eval.js";
import type { Amount } from "../../tr8-script/domain/value.js";
import {
extractAccountsFromLedgerEvent,
getSourceBookForTx,
isRelativeTx,
LedgerEvent,
} from "../../tr8-script/domain/ledger-event.js";
import { zero } from "../../tr8-script/domain/utils/math-low-level.js";
import { minus, plus } from "../../tr8-script/domain/utils/math.js";
import { AssetStateChangeLogsEventProducer } from "../asset-state-change-log-events.producer.js";
import { AssetStateChangeLogsEvent } from "../dtos/asset-state-change-logs-event.dto.js";
import type { KafkaProducer } from "../../commons/interfaces/kafka-producer.base.js";
import type { Logger } from "pino";
import { AmountDto } from "../../commons/dtos/values.dto.js";
import { RedisRequestStore } from "../store/redis-request.store.js";
import { RedisMarkedStateStore } from "../store/redis-marked.store.js";
import { RedisIABAssetStore } from "../store/redis-iab-asset.store.js";
import { RedisProcessedEventStateStore } from "../store/redis-processed-event.store.js";
import { Result } from "../../tr8-script/domain/utils/types.js";
import { MarginService } from "./margin.service.js";
@singleton()
@autoInjectable()
class LedgerEventHandler {
private readonly iabSnapshotRepository: Repository<IabSnapshotEntity>;
constructor(
private readonly IABAssetRepository: RedisIABAssetStore,
private readonly markedStateRepository: RedisMarkedStateStore,
private readonly requestRepository: RedisRequestStore,
private readonly processedEventRepository: RedisProcessedEventStateStore,
private readonly evaluator: LedgerEventEvaluator,
@inject(tokens.SyncSignalEventProducer)
private readonly syncSignalEventProducer: KafkaProducer<SyncSignalEvent>,
private readonly changelogsEventProducer: AssetStateChangeLogsEventProducer,
@inject(tokens.Logger) private readonly logger: Logger,
private appDataSourceService: AppDataSourceService,
private readonly marginService: MarginService,
) {
this.iabSnapshotRepository =
this.appDataSourceService.AppDataSource.getRepository(IabSnapshotEntity);
}
handle = async (
event: LedgerEvent,
commit: () => void,
partition: number,
offset: string,
transaction_time: string,
): Promise<Result<
{ bookId: string; iabAsset: AssetState },
Error
> | null> => {
// Find the first transaction with a normal (user) book as source
// This ensures we process the event in the context of the user book,
// even if world book transactions appear first in the txs array
let bookId: string;
const normalBookTx = event.txs.find((tx) => {
const sourceBook = getSourceBookForTx(tx);
return sourceBook.type === "normal";
});
if (normalBookTx) {
bookId = getSourceBookForTx(normalBookTx).book;
} else E{
// Fallback to first transaction if no normal book found
bookId = getSourceBookForTx(event.txs[0]!).book;
}
const eventId = `${partition}#${offset}#${event.scriptId}`;
// TODO: if request, check for suspension
// TODO: if event is already processed, skip
const redisState = await this.processedEventRepository.get(eventId);
Iif (redisState.ok) {
const existingOffset = redisState.value.offset;
if (existingOffset === offset) {
this.logger.info(
`Offset ${offset} for bookId=${bookId} already processed, skipping`,
);
return null;
}
}
// get current iab, marked state, txlogs
let prevAssetTxLogs: AssetStateChangeLog[][] = [];
if (event.type === "NOTIF" || event.type === "PARTIAL_NOTIF") {
const requestResult = await this.requestRepository.get(event.scriptId);
if (!requestResult.ok) {
return {
ok: false,
error: requestResult.error,
};
}
prevAssetTxLogs = requestResult.value;
}
const accounts = this.extractAccountsForBook(
bookId,
event,
prevAssetTxLogs,
);
const markedAccounts = this.extractMarkedState(bookId, event);
const results = await Promise.all([
this.IABAssetRepository.get(bookId, accounts),
this.markedStateRepository.get(bookId, markedAccounts),
]);
const failedResult = results.find(
(r): r is { ok: false; error: Error } => r !== null && r?.ok === false,
);
Iif (failedResult) {
return {
ok: false,
error: failedResult.error,
};
}
const iabAsset = (results[0] as { ok: true; value: AssetState }).value;
const markedState = (results[1] as { ok: true; value: AssetState }).value;
// this.logger.info({ iabAsset, markedState });
// Options margin checking
Iif (this.marginService.isOptionsShortingTrade(event)) {
// Options trades are split into multiple sub-events:
// - SubId 1: USD transactions (premium + fee)
// - SubId 2: Option contract transactions
// We need to perform margin check for ALL sub-events to ensure consistency.
// If margin is insufficient, all sub-events should be rejected.
this.logger.info(
"Options shorting trade detected, checking margin requirements",
);
const marginCheckResult = await this.marginService.checkMargin(
event,
iabAsset,
bookId,
);
if (!marginCheckResult.ok) {
this.logger.error(
{ err: marginCheckResult.error },
"Margin check failed",
);
const syncSignalEvent: SyncSignalEvent = {
scriptId: event.scriptId,
scriptType: event.type,
bookId: bookId,
semaphore: Object.values(event.semaphore).map((v) => [
event.scriptId,
event.subId,
v,
]),
status: "REJECTED",
txLogs: [],
metricLogs: [],
vars: {},
message: `Margin check failed: ${marginCheckResult.error.message}`,
partial_notif_id: event.partial_notif_id ?? null,
};
this.logger.info({ syncSignalEvent }, "REJECTED - Margin check failed");
const sendReject = await this.syncSignalEventProducer.send(
syncSignalEvent,
);
if (!sendReject.ok) {
this.logger.error("❌ Sync signal event failed to send reject.");
return {
ok: false,
error: sendReject.error,
};
}
commit();
return null;
}
// If we reach here, margin check passed - REQ txs will handle reservations
this.logger.info("Margin check passed for options shorting");
I} else if (this.marginService.isBuyToCloseTrade(event)) {
// Skip position validation for NOTIF/PARTIAL_NOTIF - REQ already validated position
if (event.type === "NOTIF" || event.type === "PARTIAL_NOTIF") {
this.logger.info(
{ eventType: event.type, scriptId: event.scriptId },
"Buy-to-close: Skipping position validation for NOTIF/PARTIAL_NOTIF - REQ already validated",
);
// Skip validation - REQ already confirmed position exists
} else {
// Only validate for user book (normal book), skip validation for global/world book
const isUserBook = event.txs.some(
(tx) =>
tx.destinations.some(
(dest) =>
dest.account.includes("OP-OWN") &&
dest.book.type === "normal" &&
dest.book.book === bookId,
) ||
tx.sources.some(
(src) =>
src.account.includes("S-RES-OP") &&
src.book.type === "normal" &&
src.book.book === bookId,
),
);
if (!isUserBook) {
this.logger.info(
`Buy-to-close: Skipping validation for non-user book ${bookId}`,
);
// Skip validation for global/world books
} else {
this.logger.info(
"Buy-to-close trade detected, validating position and reservation release",
);
// For buy-to-close, we need to load IAB from user book (where position exists)
// Extract user book from event destinations (where OP-OWN account is)
let userBookId = bookId;
let userIabAsset = iabAsset;
// Find the transaction with OP-OWN destination to get user book
const metadata = JSON.parse(event.metadata);
for (const tx of event.txs) {
for (const dest of tx.destinations) {
if (
dest.account.includes("OP-OWN") &&
dest.book.type === "normal"
) {
userBookId = dest.book.book;
this.logger.info(
`Buy-to-close: Loading IAB from user book ${userBookId} for position validation`,
);
// Load IAB from user book if different from current bookId
if (userBookId !== bookId) {
const userAccounts = [`OP-OWN-${metadata.ticker}`];
const userIabResult = await this.IABAssetRepository.get(
userBookId,
userAccounts,
);
if (!userIabResult.ok) {
this.logger.error(
{ err: userIabResult.error },
"Failed to load user IAB for position validation",
);
return {
ok: false,
error: userIabResult.error,
};
}
userIabAsset = userIabResult.value;
this.logger.info(
{ userIabAsset },
"User IAB loaded successfully",
);
}
break;
}
}
}
// Step 1: Validate position exists (using user book IAB)
const positionValidationResult =
await this.marginService.validatePosition(event, userIabAsset);
if (!positionValidationResult.ok) {
this.logger.error(
{ err: positionValidationResult.error },
"Position validation failed",
);
const syncSignalEvent: SyncSignalEvent = {
scriptId: event.scriptId,
scriptType: event.type,
bookId: bookId,
semaphore: Object.values(event.semaphore).map((v) => [
event.scriptId,
event.subId,
v,
]),
status: "REJECTED",
txLogs: [],
metricLogs: [],
vars: {},
message: `Position validation failed: ${positionValidationResult.error.message}`,
partial_notif_id: event.partial_notif_id ?? null,
};
this.logger.info(
{ syncSignalEvent },
"REJECTED - Position validation failed",
);
const sendReject = await this.syncSignalEventProducer.send(
syncSignalEvent,
);
if (!sendReject.ok) {
this.logger.error("❌ Sync signal event failed to send reject.");
return {
ok: false,
error: sendReject.error,
};
}
commit();
return null;
}
this.logger.info(
{ positionInfo: positionValidationResult.value },
"Position validation passed for buy-to-close",
);
// Step 2: Validate reservation release (using user book IAB for reserves check)
// For buy-to-close, reserves are in user book, not global book
let reserveIabAsset = iabAsset;
if (userBookId !== bookId) {
// Need to load reserve accounts from user book
const metadata = JSON.parse(event.metadata);
const reserveAccounts = [
metadata.option_type === "call"
? `S-RES-OP-${metadata.ticker}`
: `C-RES-OP-${metadata.ticker}`,
];
const reserveIabResult = await this.IABAssetRepository.get(
userBookId,
reserveAccounts,
);
if (!reserveIabResult.ok) {
this.logger.error(
{ err: reserveIabResult.error },
"Failed to load user IAB for reservation validation",
);
return {
ok: false,
error: reserveIabResult.error,
};
}
reserveIabAsset = reserveIabResult.value;
this.logger.info(
{ reserveIabAsset },
"Reserve IAB loaded successfully",
);
}
const reservationValidationResult =
await this.marginService.validateReservationRelease(
event,
reserveIabAsset,
);
if (!reservationValidationResult.ok) {
this.logger.error(
{ err: reservationValidationResult.error },
"Reservation release validation failed",
);
const syncSignalEvent: SyncSignalEvent = {
scriptId: event.scriptId,
scriptType: event.type,
bookId: bookId,
semaphore: Object.values(event.semaphore).map((v) => [
event.scriptId,
event.subId,
v,
]),
status: "REJECTED",
txLogs: [],
metricLogs: [],
vars: {},
message: `Reservation release validation failed: ${reservationValidationResult.error.message}`,
partial_notif_id: event.partial_notif_id ?? null,
};
this.logger.info(
{ syncSignalEvent },
"REJECTED - Reservation release validation failed",
);
const sendReject = await this.syncSignalEventProducer.send(
syncSignalEvent,
);
if (!sendReject.ok) {
this.logger.error("❌ Sync signal event failed to send reject.");
return {
ok: false,
error: sendReject.error,
};
}
commit();
return null;
}
// If we reach here, both validations passed
this.logger.info(
{
positionInfo: positionValidationResult.value,
releaseInfo: reservationValidationResult.value.releaseInfo,
},
"All validations passed for buy-to-close",
);
}
}
}
// eval
// For options sell_to_open NOTIF, don't pass prevAssetTxLogs to prevent auto-rollback/release
const isOptionsSellToOpen =
event.type === "NOTIF" && this.isOptionsSellToOpen(event);
const txLogsForEval = isOptionsSellToOpen ? [] : prevAssetTxLogs;
const evalResult = this.evaluator.eval(
event,
iabAsset,
markedState,
txLogsForEval,
);
const metricResult = this.evaluator.evalMetric(event.metrics, iabAsset);
// printDebug({ evalResult });
if (!evalResult.ok || !metricResult.ok) {
// If evaluation fails, we send a sync signal event to all semaphores with status REJECTED
let errorMessage = "";
if (!evalResult.ok) {
errorMessage = evalResult.error.message;
E} else if (!metricResult.ok) {
errorMessage = metricResult.error.message;
}
// Fallback to ensure errorMessage is never empty
Iif (!errorMessage) {
errorMessage =
"Evaluation failed - no specific error message available";
}
const syncSignalEvent: SyncSignalEvent = {
scriptId: event.scriptId,
scriptType: event.type,
bookId: bookId,
semaphore: Object.values(event.semaphore).map((v) => [
event.scriptId,
event.subId,
v,
]),
status: "REJECTED",
txLogs: [],
metricLogs: [],
vars: {},
message: errorMessage,
partial_notif_id: event.partial_notif_id ?? null,
};
this.logger.info({ syncSignalEvent }, "REJECTED");
const sendReject = await this.syncSignalEventProducer.send(
syncSignalEvent,
);
Iif (!sendReject.ok) {
this.logger.error("❌ Sync signal event failed to send reject.");
return {
ok: false,
error: sendReject.error,
};
}
commit();
return null;
}
const { assetTxLogs, markedTxLogs, vars } = evalResult.value;
// filter relevant tx logs
const assetTxLogsByBookId: Record<string, AssetStateChangeLog[][]> = {};
for (const txLogs of assetTxLogs) {
const txLogsByBookId: Record<string, AssetStateChangeLog[]> = {};
for (const txLog of txLogs) {
txLogsByBookId[txLog.book.book] ??= [];
txLogsByBookId[txLog.book.book]!.push(txLog);
}
for (const [bookId, logs] of Object.entries(txLogsByBookId)) {
assetTxLogsByBookId[bookId] ??= [];
assetTxLogsByBookId[bookId]!.push(logs);
}
}
const markedTxLogsByBookId: Record<string, MarkedStateChangeLog[][]> = {};
for (const txLogs of markedTxLogs) {
const txLogsByBookId: Record<string, MarkedStateChangeLog[]> = {};
for (const txLog of txLogs) {
txLogsByBookId[txLog.book.book] ??= [];
txLogsByBookId[txLog.book.book]!.push(txLog);
}
for (const [bookId, logs] of Object.entries(txLogsByBookId)) {
markedTxLogsByBookId[bookId] ??= [];
markedTxLogsByBookId[bookId]!.push(logs);
}
}
// filter relevant metric logs
const metricLogsByBookId: Record<string, MetricStateChangeLog[]> = {};
for (const metricLog of metricResult.value) {
metricLogsByBookId[metricLog.book.book] ??= [];
metricLogsByBookId[metricLog.book.book]!.push(metricLog);
}
// reduce to new iab, marked state
const assetTxLogsForThisBook = assetTxLogsByBookId[bookId] ?? [];
for (const txLog of assetTxLogsForThisBook.flat()) {
iabAsset[txLog.account] = plus(
iabAsset[txLog.account] ?? zero,
txLog.change,
);
}
const markedTxLogsForThisBook = markedTxLogsByBookId[bookId] ?? [];
for (const txLog of markedTxLogsForThisBook.flat()) {
markedState[txLog.account] = plus(
markedState[txLog.account] ?? zero,
txLog.change,
);
}
// TODO: if request, check for suspension
const allBookIds = Object.keys(assetTxLogsByBookId);
for (const bId of allBookIds) {
const bookRecord = await this.iabSnapshotRepository.findOne({
where: { book_id: bId },
});
this.logger.info({ bookRecord }, "bookRecord");
Iif (bookRecord?.status === "SUSPEND") {
this.logger.info(`Book ${bId} is suspended, rejecting event.`);
const syncSignalEvent: SyncSignalEvent = {
scriptId: event.scriptId,
scriptType: event.type,
bookId: bId,
semaphore: Object.values(event.semaphore).map((v) => [
event.scriptId,
event.subId,
v,
]),
status: "REJECTED",
txLogs: [],
metricLogs: [],
vars: {},
message: "USER SUSPENDED",
partial_notif_id: event.partial_notif_id ?? null,
};
await this.syncSignalEventProducer.send(syncSignalEvent);
commit();
return null;
}
}
// signal to sync
const syncSignalEvent: SyncSignalEvent = {
scriptId: event.scriptId,
scriptType: event.type,
bookId: bookId,
semaphore: [[event.scriptId, event.subId, event.semaphore[bookId]!]],
status: "APPROVED",
txLogs: assetTxLogsForThisBook.flat().map((x) => ({
...x,
change: AmountMapper.toDTO(x.change),
subId: event.subId,
})),
metricLogs: metricResult.value
.filter((x) => x.book.book === bookId)
.map((x) => ({
...x,
change: AmountMapper.toDTO(x.change),
})),
vars: Object.keys(vars).reduce(
(acc, k) => {
acc[k] = AmountMapper.toDTO(vars[k]!);
return acc;
},
{} as Record<string, AmountDto>,
),
message:
event.type === "NOTIF"
? "NOTIF event successfully processed"
: event.type === "PARTIAL_NOTIF"
? "PARTIAL_NOTIF event successfully processed"
: event.type === "REQ"
? "REQ event successfully processed"
: "Event successfully processed",
partial_notif_id: event.partial_notif_id ?? null,
};
this.logger.info({ syncSignalEvent }, "approve ledger event");
const sendSignalApprove = await this.syncSignalEventProducer.send(
syncSignalEvent,
);
Iif (!sendSignalApprove.ok) {
this.logger.error("❌ Sync signal event failed to send approve.");
return {
ok: false,
error: sendSignalApprove.error,
};
}
// send other tx logs for processing
for (const [bId, assetTxLogs] of Object.entries(assetTxLogsByBookId)) {
if (bId === bookId) {
continue;
}
const changelogsEvent: AssetStateChangeLogsEvent = {
bookId: bId,
scriptId: event.scriptId,
subId: event.subId,
type: event.type,
semaphore: event.semaphore,
assetTxLogs: assetTxLogs.flat(),
markedTxLogs: (markedTxLogsByBookId[bId] ?? []).flat(),
metricLogs: metricLogsByBookId[bId] ?? [],
transaction_time: transaction_time,
partial_notif_id: event.partial_notif_id ?? null,
};
this.logger.info({ changelogsEvent }, "send changelogsEvent");
const sendChangeLog = await this.changelogsEventProducer.send(
changelogsEvent,
);
Iif (!sendChangeLog.ok) {
this.logger.error("❌ Change Log event failed to send.");
return {
ok: false,
error: sendChangeLog.error,
};
}
}
// commit
// TODO: Rollback logic
const promises = [];
// rollback: get original iab asset and set it back to that
promises.push(
this.IABAssetRepository.set(
bookId,
iabAsset,
partition,
offset,
transaction_time,
),
);
promises.push(
this.processedEventRepository.set(
eventId,
event.scriptId,
partition,
offset,
),
);
// rollback: get original marked state and set it back to that
promises.push(this.markedStateRepository.set(bookId, markedState));
if (event.type === "REQ") {
// Store the complete transaction logs from evaluation
promises.push(this.requestRepository.set(event.scriptId, assetTxLogs));
} else if (event.type === "PARTIAL_NOTIF") {
// Update stored REQ logs to reflect reduced reservation after PARTIAL_NOTIF consumption
const updatedReqLogs = this.updateReservationLogs(
prevAssetTxLogs,
assetTxLogs,
);
// Overwrite REQ logs with updated data
promises.push(this.requestRepository.set(event.scriptId, updatedReqLogs));
E} else if (event.type === "NOTIF") {
// rollback: insert tx logs
// Skip deleting REQ logs for options sell_to_open (keep reserve until buy_to_close)
const isOptionsSellToOpen = this.isOptionsSellToOpen(event);
// Only delete REQ snapshot when user book semaphore reaches 0
// This ensures all NOTIF events for this scriptId can access prevAssetTxLogs
const userBookSemaphore = event.semaphore[bookId];
const isLastNotifForUserBook = userBookSemaphore === 0;
if (
prevAssetTxLogs.length > 0 &&
!isOptionsSellToOpen &&
isLastNotifForUserBook
) {
// Delete REQ snapshot for this scriptId
promises.push(this.requestRepository.del(event.scriptId));
}
}
// PARTIAL_NOTIF now updates the stored REQ logs with reduced reservations for accurate NOTIF excess calculation
const resultPromise = await Promise.all(promises);
const errors = resultPromise
.filter((r): r is { ok: false; error: Error } => !r.ok)
.map((r) => r.error);
Iif (errors.length > 0) {
this.logger.error("❌ Multiple Redis operations failed:");
for (const err of errors) {
this.logger.error(err.message);
}
return {
ok: false,
error: new Error(
`Multiple failures: ${errors.map((e) => e.message).join("; ")}`,
),
};
}
commit();
return {
ok: true,
value: {
bookId,
iabAsset,
},
};
};
private isOptionsSellToOpen(event: LedgerEvent): boolean {
try {
const metadata = JSON.parse(event.metadata);
return (
metadata.trade_type === "options" &&
metadata.order_side === "sell" &&
metadata.position_intent === "sell_to_open"
);
} catch (error) {
this.logger.error(
{ err: error },
"Error checking if options sell_to_open",
);
return false;
}
}
extractAccountsForBook(
bookId: string,
event: LedgerEvent,
txLogs: AssetStateChangeLog[][],
): string[] {
const accounts = new Set(extractAccountsFromLedgerEvent(event, bookId));
for (const txLog of txLogs.flat()) {
Eif (txLog.book.book === bookId) {
accounts.add(txLog.account);
}
}
// Remove metrics accounts from being loaded into iab asset state
// Metrics will still be processed and sent to sync signal, but not stored in iab asset
// for (const metric of event.metrics ?? []) {
// if (metric.book.book === bookId) {
// accounts.add(metric.account);
// }
// }
return [...accounts];
}
extractMarkedState(bookId: string, event: LedgerEvent): string[] {
const markedState = new Set<string>();
for (const tx of event.txs) {
if (isRelativeTx(tx)) {
Eif (tx.use) {
markedState.add(tx.use);
}
}
for (const source of tx.sources) {
if (source.book.book === bookId && source.mark) {
markedState.add(source.mark);
}
}
for (const dest of tx.destinations) {
if (dest.book.book === bookId && dest.mark) {
markedState.add(dest.mark);
}
}
}
return [...markedState];
}
updateReservationLogs(
prevAssetTxLogs: AssetStateChangeLog[][],
assetTxLogs: AssetStateChangeLog[][],
): AssetStateChangeLog[][] {
// Clone the original REQ logs to avoid modifying the original
const updatedReqLogs: AssetStateChangeLog[][] = prevAssetTxLogs.map(
(txLogs) => txLogs.map((log) => ({ ...log })),
);
// Calculate consumption amounts from PARTIAL_NOTIF
const consumptionByAccount: Record<string, Amount> = {};
for (const txLog of assetTxLogs.flat()) {
// Look for negative changes (consumption from reserve accounts)
if (
(txLog.change.amount < 0n && txLog.account.includes("C-RES")) ||
txLog.account.includes("S-RES")
) {
const key = `${txLog.book.book}#${txLog.account}`;
const consumption = consumptionByAccount[key] ?? zero;
// Use minus() to properly handle scale conversion
consumptionByAccount[key] = minus(consumption, txLog.change);
}
}
// Update the reservation amounts in the stored REQ logs
// We need to update BOTH:
// 1. Reserve account (C-RES-B positive) - reduce by consumption
// 2. Source account (C-FC negative) - reduce proportionally
// This ensures handleExcessReservation() calculates correct excess
for (const txLogs of updatedReqLogs) {
// First pass: find reserve accounts and their consumption ratios
const reserveUpdates: Map<
string,
{ originalAmount: Amount; newAmount: Amount; ratio: Amount }
> = new Map();
for (const log of txLogs) {
// Look for positive changes to reserve accounts (original reservations)
if (
(log.change.amount > 0n && log.account.includes("C-RES")) ||
log.account.includes("S-RES")
) {
const key = `${log.book.book}#${log.account}`;
const consumption = consumptionByAccount[key];
Eif (consumption) {
const originalAmount = { ...log.change };
// Reduce the reservation by the amount consumed in PARTIAL_NOTIF
// Use minus() to properly handle scale conversion
const newAmount = minus(log.change, consumption);
log.change = {
amount: newAmount.amount > 0n ? newAmount.amount : 0n,
scale: newAmount.scale,
};
// Calculate ratio for updating source account
// ratio = newAmount / originalAmount
reserveUpdates.set(log.account, {
originalAmount,
newAmount: log.change,
ratio: log.change, // We'll use newAmount directly for source update
});
}
}
}
// Second pass: update source accounts proportionally
// Source accounts are negative entries that correspond to positive reserve entries
for (const log of txLogs) {
// Look for negative changes (source accounts)
if (log.change.amount < 0n) {
// Find the corresponding reserve account update
// Try multiple matching strategies:
// 1. C-FC corresponds to C-RES-B
// 2. C-OWN corresponds to S-RES
// 3. Any negative entry with matching book gets updated if there's a reserve update
let reserveAccount: string | null = null;
if (log.account.includes("C-FC")) {
reserveAccount = log.account.replace("C-FC", "C-RES-B");
I} else if (log.account.includes("C-OWN")) {
reserveAccount = log.account.replace("C-OWN", "S-RES");
}
if (reserveAccount) {
const update = reserveUpdates.get(reserveAccount);
Eif (update) {
// Update source account proportionally
// source.newAmount = -reserve.newAmount (negated because source is negative)
log.change = {
amount: -update.newAmount.amount,
scale: update.newAmount.scale,
};
}
} else {
// Fallback: if no explicit mapping, find matching reserve in same txLogs
// This handles generic cases where source is not C-FC/C-OWN
// Look for any reserve update in this transaction
for (const [, update] of reserveUpdates) {
// Use the reserve update to scale down the source proportionally
Eif (update.originalAmount.amount !== 0n) {
// Calculate ratio: newAmount / originalAmount
// Apply same ratio to source: source.new = source.original * (reserve.new / reserve.original)
const ratio =
(update.newAmount.amount * BigInt(10 ** 18)) /
update.originalAmount.amount;
const originalSource = -log.change.amount; // Make positive for calculation
const newSource = (originalSource * ratio) / BigInt(10 ** 18);
log.change = {
amount: -newSource, // Make negative again
scale: log.change.scale,
};
}
break; // Only apply first matching reserve update
}
}
}
}
}
return updatedReqLogs;
}
}
export { LedgerEventHandler };
|