Added pml files (raw uml text)

Payment Flows/Legacy Card/Legacy Hosted Merchant Card Payment - CG Proposal.pml

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+@startuml
+Autonumber
+
+Participant "Payee (Merchant) PSP" as MPSP
+Participant "Payee (Merchant) Site" as Payee
+Actor "Payer (Shopper) Browser" as Payer
+Participant "Browser Payment Agent/Wallet" as UA
+Participant "Payer (Shopper) PSP Wallet [aka Issuer Wallet]" as CPSP
+
+note over Payee, Payer: HTTPS
+
+title Legacy Merchant Hosted Card Payment (CG Proposal)
+
+Payee->Payer: Basket Page with Pay Button
+
+
+Payer->UA: Select Payment Instrument
+
+UA-\MPSP: Auth
+Note right 
+	Auth goes direct from Browser to Payee's nominated PSP (see
+	https://web-payments.org/specs/source/web-payments-api/#payment-flow-overview
+	6.1)
+End note
+
+MPSP-/UA: Auth Response
+
+UA->Payee: Auth Response
+Payee->Payer: Result Page
+
+@enduml

Payment Flows/Legacy Card/Legacy Hosted Merchant Card Payment - Current.pml

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+@startuml
+Autonumber
+
+Participant "Payee (Merchant) PSP" as MPSP
+Participant "Payee (Merchant) Site" as Payee
+Actor "Payer (Shopper) Browser" as Payer
+participant "Browser Form Filler" as UA
+participant "Payer (Shopper) PSP Wallet [aka Issuer Wallet]" as CPSP
+
+note over Payee, Payer: HTTPS
+
+title Legacy Merchant Hosted Card Payment (Current)
+
+Payee->Payer: Basket Page with Pay Button
+Payer->Payer: Select Card Brand
+opt
+	UA->Payer: Form Fill; PAN, Expiry Date, [CVV], [AVS]
+End
+
+Alt
+	Payer->Payee: payload
+Else
+	Payer->Payee: Encrypt(payload)
+	Note right: Custom code on merchant webpage can encrypt payload
+End
+
+Payee-\MPSP: Authenticate(payload)
+MPSP-/Payee: Authentication Result
+
+Payee->Payer: Result Page
+
+@enduml

Payment Flows/Legacy Card/Legacy Hosted Merchant Card Payment - Google Proposal.pml

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+@startuml
+autonumber
+Participant "Payee (Merchant) PSP" as MPSP
+Participant "Payee (Merchant) Site" as Payee
+Actor "Payer (Shopper) Browser" as Payer
+participant "Browser Payment Agent/Wallet" as UA
+participant "Payer (Shopper) PSP Wallet [aka Issuer Wallet]" as CPSP
+participant "Issuer Website" as CPSPW
+
+
+note over Payee, Payer: HTTPS
+
+title Legacy Merchant Hosted Card Payment (Google Proposal)
+
+Payee->Payer: Basket Page with Pay Button
+
+Payer->UA: Select Payment Instrument
+
+Opt
+	CPSP->UA: Payment Instrument data
+	Note left
+		If 3rd Party provides extension,
+ 		e.g. LastPass, MasterPass, Barclaycard
+	End note
+End
+
+UA->Payer: Payment Instrument data
+
+Alt
+	Payer->Payee: Payment Instrument Data
+Else
+	Payer->Payee: Encrypt(Payment Instrument Data)
+	Note right: Custom code on merchant webpage can encrypt payload
+End
+
+Payee-\MPSP: Authenticate(Payment Instrument data)
+MPSP-/Payee: Authentication Result
+
+Payee->Payer: Result Page
+
+@enduml

Payment Flows/Legacy Card/Legacy Hosted Merchant Card Payment with 3DS - CG Proposal.pml

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+@startuml
+Autonumber
+
+Participant "Payee (Merchant) PSP" as MPSP
+Participant "Payee (Merchant) Site" as Payee
+Actor "Payer (Shopper) Browser" as Payer
+Participant "Browser Payment Agent" as UA
+Participant "Payer (Shopper) PSP Wallet [aka Issuer Wallet]" as CPSP
+Participant "Issuer Website" as CPSPW
+
+note over Payee, Payer: HTTPS
+
+title Legacy Merchant Hosted Card Payment (CG Proposal)
+
+Payee->Payer: Basket Page with Pay Button
+
+
+Payer->UA: Select Payment Instrument
+
+UA-\MPSP: Auth
+Note right 
+	Auth goes direct from Browser to Payee's nominated PSP (see
+	https://web-payments.org/specs/source/web-payments-api/#payment-flow-overview
+	6.1)
+End note
+
+Opt
+	MPSP-/Payee: 3DS invoke
+	Payee->CPSPW: 3DS invoke
+	CPSPW-\Payer: 3DS challenge
+	Payer-/CPSPW: 3DS response
+	CPSPW->Payee: 3DS response
+	Payee-\MPSP: Authentication(3DS token)
+End
+
+
+MPSP-/UA: Auth Response
+
+UA->Payee: Auth Response
+Payee->Payer: Result Page
+
+@enduml

Payment Flows/Legacy Card/Legacy Hosted Merchant Card Payment with 3DS - Current.pml

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+@startuml
+Autonumber
+
+Participant "Payee (Merchant) PSP" as MPSP
+Participant "Payee (Merchant) Site" as Payee
+Actor "Payer (Shopper) Browser" as Payer
+participant "Browser Form Filler" as UA
+participant "Payer (Shopper) PSP Wallet [aka Issuer Wallet]" as CPSP
+participant "Issuer Website" as CPSPW
+
+note over Payee, Payer: HTTPS
+
+title Legacy Merchant Hosted Card Payment with 3DS (Current)
+
+Payee->Payer: Basket Page with Pay Button
+Payer->Payer: Select Card Brand
+opt
+	UA->Payer: Form Fill; PAN, Expiry Date, [CVV], [AVS]
+End
+
+Alt
+	Payer->Payee: payload
+Else
+	Payer->Payee: Encrypt(payload)
+	Note right: Custom code on merchant webpage can encrypt payload
+End
+
+Payee-\MPSP: Authenticate(payload)
+
+Opt
+	MPSP-/Payee: 3DS redirect
+	Payee->Payer: 3DS redirect
+	Payer->CPSPW: 3DS invoke
+	CPSPW-\Payer: 3DS challenge
+	Payer-/CPSPW: 3DS response
+	CPSPW->Payer: 3DS response
+	Payer->Payee: 3DS response
+	Payee-\MPSP: Authentication(3DS token)
+End
+
+MPSP-/Payee: Authenication Response
+
+
+Payee->Payer: Result Page
+
+@enduml

Payment Flows/Legacy Card/Legacy Hosted Merchant Card Payment with 3DS - Google Proposal.pml

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+@startuml
+autonumber
+Participant "Payee (Merchant) PSP" as MPSP
+Participant "Payee (Merchant) Site" as Payee
+Actor "Payer (Shopper) Browser" as Payer
+participant "Browser Payment Agent/Wallet" as UA
+participant "Payer (Shopper) PSP Wallet [aka Issuer Wallet]" as CPSP
+participant "Issuer Website" as CPSPW
+
+
+note over Payee, Payer: HTTPS
+
+title Legacy Merchant Hosted Card Payment with 3DS (Google Proposal)
+
+Payee->Payer: Basket Page with Pay Button
+
+
+Payer->UA: Select Payment Instrument
+
+Opt
+	CPSP->UA: Payment Instrument data
+	Note left
+		If 3rd Party provides extension,
+ 		e.g. LastPass, MasterPass, Barclaycard
+	End note
+End
+
+UA->Payer: Payment Instrument data
+
+Alt
+	Payer->Payee: Payment Instrument Data
+Else
+	Payer->Payee: Encrypt(Payment Instrument Data)
+	Note right: Custom code on merchant webpage can encrypt payload
+End
+
+Payee-\MPSP: Authenticate(Payment Instrument data)
+
+Opt
+	MPSP-/Payee: 3DS redirect
+	Payee->Payer: 3DS redirect
+	Payer->CPSPW: 3DS invoke
+	CPSPW-\Payer: 3DS challenge
+	Payer-/CPSPW: 3DS response
+	CPSPW->Payer: 3DS response
+	Payer->Payee: 3DS response
+	Payee-\MPSP: Authentication(3DS token)
+End
+
+
+MPSP-/Payee: Authentication Result
+
+Payee->Payer: Result Page
+
+@enduml