@startuml
Actor Sender as S
Actor Receiver as R

group Blind an UTXO
R ->> R: <font color=red>Wallet::blind</font>
note right of R: blinded UTXO is sort of "RGB address"
end

group Send blinded UTXO
R ->> S: blinded UTXO
note over R,S: through arbitrary communication channel
end

group Start sending process
S <<- S: <font color=red>Wallet::send(**donation=false**)</font>
note left of S: send consignment to the receiver\ndon't broadcasting the TX yet
end

S ->> R: consignment

group Check consignment
R ->> R: <font color=red>Wallet::refresh</font>
note right of R: validate consignment
note right of R: ACK if validation succeeds
end

R ->> S: ACK

group Send RGB assets
S <<- S: <font color=red>Wallet::refresh</font>
note left of S: check if receiver ACKed\nbroadcast the TX if so
end

group Consume RGB transfer
R ->> R: <font color=red>Wallet::refresh</font>
note right of R: check TX confirmations
end

group Consume RGB transfer
S <<- S: <font color=red>Wallet::refresh</font>
note left of S: check TX confirmations
end
@enduml