Channels & Payment Methods

Updated: 7/26/26, 5:36:13 PM

All codes below are taken from the open-source enum classes and are code-authoritative.
For concept distinctions (pay provider / pay method / payment channel / payment product / capability), see Glossary.

Payment Channel — ChannelEnum

Dictionary: channel. 17 channel enums are defined (in source declaration order).

• Implemented — full strategy implementation (pay / close / sync / refund) exists under the main app daxpay-channel/; some are backed by independently-deployed channel sub-apps that carry the SDK calls.
• Reserved — enum defined only, no implementation yet, extensible on demand.

code	Channel	Status	Notes
alipay	Alipay	Implemented ✅	Supports direct + ISV
wechat	WeChat Pay	Implemented ✅	Supports direct + ISV
union_pay	UnionPay	Reserved	—
leshua_pay	Leshua	Implemented ✅	—
vbill_pay	VBILL (Suixingfu)	Implemented ✅	—
huifu	Huifu (Adapay/Dougong)	Implemented ✅	Hosts two products ada_pay and dougong_pay (see Product table)
hkrt_pay	HKRT	Implemented ✅	—
lakala_pay	Lakala	Implemented ✅	—
fuyou_pay	Fuiou	Implemented ✅	—
sheng_pay	Sheng Pay	Reserved	—
ysep_pay	YSEP	Reserved	—
quick_pay	Quick Pay (99Bill)	Reserved	—
sand_pay	Sand	Implemented ✅	Indirectly via the hm_pay product (see Product table)
yee_pay	Yeepay	Implemented ✅	Implemented in channel sub-app channel-two, not yet enabled in startup module
ums_pay	UMS (UnionPay Merchant Services)	Implemented ✅	—
douyin	Douyin Pay	Implemented ✅	Direct brand, no _pay suffix

Naming convention

Direct-brand channels usually have no _pay suffix (wechat / alipay / douyin); ISV / aggregate channels may use xxx_pay (except lakala_pay / huifu). See Glossary.

Payment Product — ProductEnum

Dictionary: pay_product. 24 payment products are defined (in source declaration order). Each product binds to a channel (mapped via ProductEnum.getChannel()); the routing anchor is the product, not the channel (see Glossary).

• Implemented — has a corresponding daxpay-channel-* strategy (pay / close / sync / refund), 20 in total.
• Reserved — enum defined only, no implementation yet, 4 in total.

Alipay

code	Product	Channel
alipay	Alipay (Direct)	alipay
alipay_isv	Alipay (ISV / Service Provider)	alipay

WeChat Pay

code	Product	Channel
wechat_pay	WeChat Pay (Direct)	wechat
wechat_isv	WeChat Pay (ISV / Service Provider)	wechat

Douyin Pay

code	Product	Channel
douyin_pay	Douyin Pay	douyin

UMS (UnionPay Merchant Services)

code	Product	Channel
ums_qrcode	UMS (C-scan-B)	ums_pay
ums_jsapi	UMS (Official Account)	ums_pay
ums_app	UMS (APP)	ums_pay
ums_mini	UMS (Mini-program)	ums_pay
ums_h5	UMS (H5)	ums_pay
ums_barcode	UMS (B-scan-C)	ums_pay

Third-party Aggregate Channels

code	Product	Channel	Status
lakala_pay	Lakala	lakala_pay	Implemented ✅
leshua_pay	Leshua	leshua_pay	Implemented ✅
ada_pay	Adapay	huifu	Implemented ✅
dougong_pay	Dougong	huifu	Implemented ✅
hkrt_pay	HKRT	hkrt_pay	Implemented ✅
vbill_pay	VBILL (Suixingfu)	vbill_pay	Implemented ✅
fuyou_pay	Fuiou	fuyou_pay	Implemented ✅
hm_pay	HMPay (on Sand's rail)	sand_pay	Implemented ✅
yee_pay	Yeepay	yee_pay	Implemented ✅
sheng_pay	Sheng Pay	sheng_pay	Reserved
ysep_pay	YSEP	ysep_pay	Reserved
quick_pay	Quick Pay (99Bill)	quick_pay	Reserved

One channel, multiple products

Some channels host multiple products — a key design of channel routing:

• huifu → ada_pay + dougong_pay — two products share one Huifu channel
• ums_pay → 6 products — C-scan-B / Official Account / APP / Mini-program / H5 / B-scan-C, each onboarded independently
• sand_pay → hm_pay — HMPay runs on Sand's rail
• alipay / wechat → 2 products each — Direct + ISV (Service Provider)

Payment Method — PayMethodEnum

Dictionary: pay_method. The code is globally unique and each method binds to exactly one pay provider (provider).

The aggregated aggregate_pay_barcode is no longer provided. When the merchant scans the user's barcode, the platform identifies the wallet by the authCode prefix and maps it to wechat_barcode / alipay_barcode / union_barcode, then resolves routing.
Prefix rules: WeChat 10–15, Alipay 25–30, UnionPay 62. Merchants may pass only authCode without method.

Aggregate Pay

code	Method	Description
aggregate_pay_qrcode	Aggregate QR pay	Native channel scan

WeChat Pay

code	Method
wechat_cashier	WeChat mini-program cashier
wechat_qr	WeChat Native QR
wechat_jsapi	WeChat JSAPI
wechat_mini	WeChat mini-program
wechat_h5	WeChat H5
wechat_app	WeChat in-app payment
wechat_barcode	WeChat barcode (merchant scan)

Alipay

code	Method
alipay_qr	Alipay scan (QR)
alipay_jsapi	Alipay JSAPI (incl. mini-program; official product code JSAPI_PAY)
alipay_pc	Alipay PC web pay
alipay_h5	Alipay H5
alipay_app	Alipay in-app payment
alipay_barcode	Alipay barcode (merchant scan)

UnionPay

code	Method
union_qr	UnionPay scan (QR)
union_jsapi	UnionPay JSAPI
union_h5	UnionPay H5
union_barcode	UnionPay barcode (merchant scan)

Douyin

code	Method
douyin_qr	Douyin scan pay
douyin_jsapi	Douyin JSAPI pay
douyin_h5	Douyin H5 pay
douyin_app	Douyin in-app pay

Card Schemes (Visa / MasterCard)

code	Method
visa_card_gateway	Visa gateway pay
visa_card_present	Visa card-present pay
mastercard_card_gateway	MasterCard gateway pay
mastercard_card_present	MasterCard card-present pay

Other

code	Method	Description
other	Other	No fixed provider, provider is null

Channel Implementation Architecture

The main app calls independently-deployed channel sub-apps over HTTP to isolate third-party SDK dependencies and allow independent upgrades and elastic scaling.

• Channel strategy layer — unified under the main app's daxpay-channel/ (pay / close / sync / refund orchestration, no SDK).
• Channel sub-apps — dax-pay-channel-one (Alipay / WeChat / Douyin / UMS, port 20100), dax-pay-channel-two (Lakala / HKRT / Dougong / Leshua / VBILL / HMPay / Adapay / Fuiou, port 20200).

To add a new channel, create an independent sub-app following the dax-pay-channel-one / dax-pay-channel-two pattern.

Docs for AI Assistants

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