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tiennm99 c9270764f2 feat: add fake trading module with crypto, stocks, forex and gold

Paper trading system with 5 commands (trade_topup, trade_buy,
trade_sell, trade_convert, trade_stats). Supports VN stocks via TCBS,
crypto via CoinGecko, forex via ER-API, and gold via PAX Gold proxy.
Per-user portfolio stored in KV with 60s price caching. 54 new tests.

2026-04-14 15:16:53 +07:00

1.9 KiB

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Fake Trading Module

Phases

#	Phase	Status	Effort	Files
1	Symbol registry + formatters	Pending	45m	`src/modules/trading/symbols.js`, `src/modules/trading/format.js`
2	Price fetching + caching	Pending	1h	`src/modules/trading/prices.js`
3	Portfolio data layer	Pending	45m	`src/modules/trading/portfolio.js`
4	Command handlers + module entry	Pending	1.5h	`src/modules/trading/index.js`
5	Integration wiring	Pending	15m	`src/modules/index.js`, `wrangler.toml`
6	Tests	Pending	1.5h	`tests/modules/trading/*.test.js`

Dependencies

Phase 1 ──┐
Phase 2 ──┼──► Phase 4 ──► Phase 5
Phase 3 ──┘                    │
Phase 1,2,3,4 ────────────► Phase 6

Data flow

User /trade_buy 0.5 BTC
  -> index.js parses args, validates
  -> prices.js fetches BTC/VND (cache-first, 60s TTL)
  -> portfolio.js reads user KV, checks VND balance
  -> portfolio.js deducts VND, adds BTC qty, writes KV
  -> format.js renders reply
  -> ctx.reply()

Rollback

Remove trading from MODULES in wrangler.toml + src/modules/index.js. KV data inert.

Key decisions

VND sole settlement currency for buy/sell
Single KV object per user (acceptable race for paper trading)
60s price cache TTL via KV putJSON with expirationTtl
Gold via PAX Gold on CoinGecko (troy ounces)
Stocks integer-only quantities

1.9 KiB Raw Blame History