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65 lines
1.4 KiB
65 lines
1.4 KiB
@startuml
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database Bitcoin
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actor Bob
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Actor Alice
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database Monero
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group Negotiation
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Bob --> Alice: Establish connection
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group Request Response Channel
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Bob -> Alice: Swap request
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note left: Btc Amount\naddress hints
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note right: Alice stores peer id & address hints\nto contact Bob
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Alice --> Bob: Swap response
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note right: ACK or NACK\n Exact XMR amount
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end
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end
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group Execution Setup
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group Phase A [Messages can be exchanged in any order]
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Bob -> Alice: Message0
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note left: Pubkeys\ndleq proof s_b\nxmr viewkey v_b\nbtc refund addr
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Alice -> Bob: Message1
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note right: Pubkeys\ndleq proof s_a\nxmr view key v_a\nbtc redeem addr\nbtc punish addr
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end
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group Phase B [Messages must be exchanged in the given order]
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Bob -> Alice: Message2
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note left: unsigned btc lock tx
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Alice -> Bob: Message3
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note right: btc cancel tx sig\nbtc refund tx enc sig S_b
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Bob -> Alice: Message4
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note left: btc punish tx sig\nbtc cancel tx sig
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end
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end
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group Execution
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Bob ->> Bitcoin: Lock
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Alice ->> Monero: Lock
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Alice -> Bob: Message5
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note right: xmr lock tx transfer proof\nThis can be removed if Bob watches the blockchain.
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Bob -> Alice: Message6
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note left: redeem tx enc sig S_a
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Alice ->> Bitcoin: Redeem
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Bitcoin ->> Bob: Signature
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Bob -> Bob: Extract s_a
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Bob ->> Monero: Redeem
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end
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@enduml
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