Fund flow follows channel type
Platform sweeps to the pool; self pays merchant addresses. No third-party goods custody.
Independent payments · USDT TRC20
CHINAUSDT
Checkout built for auditable settlement
Platform/self channels, HMAC orders, on-chain confirm, signed webhooks. Integer minor units, ledger-before-balance, settle once per order.
The platform retains recovery capability to help restore access. Credentials and seeds are encrypted—never plaintext at rest.
ChannelsPlatform / Self
LedgerInteger minors
AuthHMAC + Nonce
NotifySigned webhook
Capabilities
One rule set from create to settle: fund flow by channel type, zero-float ledger, no plaintext secrets.
USDT pool & confirmations
TRC20 polling, exclusive borrow, cool-down on close, late-pay handling.
HMAC & webhooks
Five-line signing string; idempotent fulfillment with retries.
Two consoles
Tenant console for projects/channels; owner admin for tenants, fees, and ops.
Integrate in three steps
Your app owns intent and fulfillment; CHINAUSDT owns collection confirm.
Provision project
Create a project, take api_key / sign / webhook secrets, set notify URL.
HMAC create order
Call /checkout/v1/orders and show the USDT address or checkout URL.
Webhook fulfill
Verify signature; fulfill once by out_trade_no; return 2xx.
Articles
Integration, channel choice, and ledger rules—short and accurate.
Connecting a USDT checkout with HMAC and webhooks
How CHINAUSDT signs create-order requests and delivers order.paid webhooks—checklist for engineering leads.
Platform vs self channels—follow the money
The real differences between CHINAUSDT platform and self channels: sweep target, payout path, and key custody.
Why we forbid floating-point amounts
CHINAUSDT stores amounts as integer minor units, writes ledger before balance, and settles once per order.
Ready to integrate?
Configure keys in the tenant console, or start with the articles for a tech review.