diagram.dot


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digraph g {
size="800,800";
wallet -> merchant_frontend [label=" buy"];
merchant_frontend -> merchant_backend [label="internal cooperation"];
merchant_backend -> merchant_frontend;
wallet -> exchange [label=" coins withdrawal"];
merchant_backend -> exchange [label="deposit coins"];
wallet -> bank [label="wire funds to exchange's account"];
bank -> exchange [label="notify of wiretransfer"];
}