Create an offer to buy/sell cryptocurrency for fiat money and specify your terms.
SIGEN informs you that a counterparty (buyer/seller) has been found. You finalize the terms and conditions of the transaction with your counterparty
Once the transaction begins, the seller's cryptocurrency is locked (put in escrow) by SIGEN until the buyer transfers the payment for it. The buyer transfers funds to the seller's account. As soon as the seller confirms that the funds have been received, the previously locked cryptocurrency is transferred to the buyer's account.