Start with the trader funding path.
The first integration should not be the hardest payout case. It should be the deposit path the broker already understands: trader chooses an amount, broker creates a payment instruction, halfin collects crypto, and the broker credits the trading account only after its own rules say the payment is usable.
Create a fiat-anchored invoice
Quote the trader in the account currency. The payment session tells the trader which assets and networks are supported.
Collect through hosted checkout
The broker avoids wallet instructions in support chat. The trader pays through a purpose-built checkout page with a clear amount and expiry.
Wait for final payment state
Your CRM should not credit the trader from a screenshot. It should read the payment state through API or signed webhook.
Reconcile to trader ID
Store the invoice ID, trader ID, account ID, asset, network, and final payment state together so support can answer without searching wallets.
Pick stablecoins before you pick every coin.
Most FX teams start with stablecoins because the trader thinks in account currency and the broker reconciles in account currency. USDT is often requested by traders because it is widely held. USDC can be easier for treasury policy and some reporting teams. The right first asset is the one finance can reconcile and support can explain.
The mistake is opening every supported asset before the desk has a settlement policy. Start with the assets and networks your traders actually use, then add depth after payment support, treasury, and compliance can handle the flow.
Compare USDT and USDC for depositsKeep payment controls and broker controls in the right place.
Crypto payment acceptance is not a substitute for broker licensing, trader KYC, sanctions policy, suitability review, or platform risk controls. A workable design keeps those controls in the broker stack and sends only approved payment instructions to the payment processor.
The broker should decide who may trade. halfin should process the payment rail and return reliable status. That separation makes the audit trail easier to defend: the broker can show why the trader was approved, and payment operations can show when funds arrived, what wallet paid, what risk checks ran, and which payout left the system.
- Attach trader, account, and payment IDs to every invoice.
- Screen source and destination wallets before accepting or paying.
- Store the final payment state before crediting a trading account.
- Keep withdrawal approval outside the payment processor.
- Use signed webhooks for finance automation, not screenshots.
A thin payment layer is enough for the first release.
A broker does not need to rebuild its trading platform to accept crypto. The first release can be a small set of payment calls and records around the systems the broker already uses.
Map payment events
Decide which states the trader portal, CRM, finance desk, and support console need: invoice created, payment detected, settled, expired, payout approved, payout sent.
Store IDs at the boundary
Save halfin invoice and payout IDs beside your trader and account IDs. The audit path should not depend on wallet search.
Automate after manual proof
Run the first release with operator review. Automate crediting and payouts only after support, finance, and risk agree on the failure states.
Continue through the FX content cluster.
The guide links back to the hub and into the operating notes that cover asset choice, funding speed, compliance, and payouts.