Coincheck

Spot trading on the Japanese exchange Coincheck (API address https://coincheck.com). It uses REST only, with no market-data or order push. Private endpoints are signed with a Coincheck API key (Access Key and Secret Key). The exchange has no K-line, all-market ticker, market list or historical order endpoint; see below for how the affected functions behave.

Names and Configuration

exchange.GetName(): Coincheck (Spot).

Field	Required
Access Key	Yes
Secret Key	Yes

Trading Pairs and Contract Codes

Pair examples: BTC_JPY, ETH_JPY

Trading pairs are written BASE_QUOTE, matching the Coincheck native code btc_jpy; the tradable pairs are whatever the exchange lists.

Function Support

Not supported (the call fails with an error and returns null): exchange.GetTickers, exchange.GetMarkets, exchange.GetHistoryOrders, exchange.ModifyOrder, exchange.ModifyConditionOrder, exchange.GetHistoryConditionOrders.

Served through a fallback:

• exchange.GetRecords: The exchange has no K-line endpoint; bars are synthesized by the docker from trades. The first call covers only the few bars spanned by recent trades, and more accumulate with later calls.
• exchange.GetOrder: The exchange has no single-order query interface, so the order is looked up among the current open orders; the exchange provides no historical order query, so filled or canceled orders cannot be found (null is returned).

Notes

• The amount of a market buy order is the quote currency (JPY) to spend (placed as Coincheck's market_buy_amount); a market sell order uses the base-currency quantity. A conditional buy that executes at market once triggered is also sized in JPY.
• Maker-only (postOnly, limit orders only) orders are supported; the tif (IOC, FOK) option is not and reports an error.
• Conditional orders use the stop_loss_rate (trigger price) of the Coincheck order endpoint and support take-profit and stop-loss (without an order price they execute at market once triggered), not OCO; conditional orders are canceled through the same endpoint as normal orders.
• When exchange.GetConditionOrders() is called without the symbol argument, take-profit and stop-loss cannot be told apart from the current price, and the conditional orders are returned with the generic condition type.
• The orders returned by exchange.GetOrders() and exchange.GetConditionOrders() only reflect the unfilled part: Amount is the remaining unfilled quantity (Coincheck's pending_amount), and DealAmount and AvgPrice are 0; for a market buy order (such as a conditional buy that executes at market once triggered), Amount is the remaining JPY amount.
• exchange.GetTicker() has no opening price, so Open is filled with the last price.