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Update state machine documentation to use dash-separated naming

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- Convert all state names from underscore to dash format in markdown documentation
- Ensures consistency across all documentation formats (dot, svg, markdown)
- All payment states now use dashes: confirmed-complete, underpaid-refunded, etc.
- Maintains consistency with the source dot file which is the canonical reference

This completes the documentation naming convention standardization.
This commit is contained in:
Russell Ballestrini 2025-10-04 13:02:07 -04:00
parent fde7e2b2d0
commit 3fedfeb849
4 changed files with 405 additions and 387 deletions
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7
Makefile
View file

@ -68,13 +68,18 @@ help:
@echo " make sweep-all-doge - Sweep ALL Dogecoin wallet funds to cold storage (dust collection)"
@echo " make monero-transactions - View recent wallet transactions"
@echo ""
@echo "DOCUMENTATION:"
@echo " make docs/state-machine.dot.svg - Generate state machine diagram from .dot file"
@echo ""
@echo "CLEANUP:"
@echo " make clean - Remove virtual environment"
@echo ""
@echo "For more info, see README.md and CRYPTO.rst"
docs/state-machine.dot.svg:
docs/state-machine.dot.svg: docs/state-machine.dot
@echo "Generating state machine diagram from docs/state-machine.dot..."
dot -Tsvg docs/state-machine.dot -o docs/state-machine.dot.svg
@echo "✓ Generated docs/state-machine.dot.svg"
# -----------------------------------------------------------------------------
# Environment Setup Targets

122
docs/crypto-payments-state-machine.md
View file

@ -7,8 +7,8 @@ This document visualizes the complete state machine for cryptocurrency payments
```mermaid
stateDiagram-v2
[*] --> pending
[*] --> doublepay_refunded : Duplicate payment detected
[*] --> latepay_refunded: Late payment detected
[*] --> doublepay-refunded : Duplicate payment detected
[*] --> latepay-refunded: Late payment detected
%% Main payment flow
pending --> received : Payment detected in mempool
@ -18,47 +18,47 @@ stateDiagram-v2
%% From received state - multiple possible outcomes
%% NOTE: received payments CANNOT expire (detected in mempool, confirmations tracking)
received --> confirmed : Sufficient payment + confirmations
received --> confirmed_overpay : Overpayment detected
received --> underpaid_refunded : Underpayment detected
received --> out_of_stock_refunded : Product unavailable
received --> confirmed-overpay : Overpayment detected
received --> underpaid-refunded : Underpayment detected
received --> out-of-stock-refunded : Product unavailable
%% Successful payment paths
confirmed --> confirmed_complete : Swept to cold storage
confirmed_complete --> [*] : ✓ Terminal Success
confirmed --> confirmed-complete : Swept to cold storage
confirmed-complete --> [*] : ✓ Terminal Success
%% Overpayment refund flow
confirmed_overpay --> confirmed_overpay_refunded : Initiate refund
confirmed_overpay_refunded --> confirmed_overpay_refunded_complete : Refund confirmed
confirmed_overpay_refunded --> confirmed_overpay_not_refunded : No refund wallet configured
confirmed_overpay_refunded_complete --> [*] : ✓ Terminal Success
confirmed_overpay_not_refunded --> [*] : ✓ Terminal Success (Not Refunded)
confirmed-overpay --> confirmed-overpay-refunded : Initiate refund
confirmed-overpay-refunded --> confirmed-overpay-refunded-complete : Refund confirmed
confirmed-overpay-refunded --> confirmed-overpay-not-refunded : No refund wallet configured
confirmed-overpay-refunded-complete --> [*] : ✓ Terminal Success
confirmed-overpay-not-refunded --> [*] : ✓ Terminal Success (Not Refunded)
%% Expired payment handling (terminal - late payments create new objects)
expired --> [*] : ✓ Terminal Failed (Expired)
%% Late payment objects (created separately for payments after expiration)
latepay_refunded --> latepay_refunded_complete : Refund confirmed
latepay_refunded --> latepay_not_refunded : No refund wallet configured
latepay_refunded_complete --> [*] : ✓ Terminal Failed (Refund Complete)
latepay_not_refunded --> [*] : ✓ Terminal Failed (Not Refunded)
latepay-refunded --> latepay-refunded-complete : Refund confirmed
latepay-refunded --> latepay-not-refunded : No refund wallet configured
latepay-refunded-complete --> [*] : ✓ Terminal Failed (Refund Complete)
latepay-not-refunded --> [*] : ✓ Terminal Failed (Not Refunded)
%% Underpayment refund flow
underpaid_refunded --> underpaid_refunded_complete : Refund confirmed
underpaid_refunded --> underpaid_not_refunded : No refund wallet configured
underpaid_refunded_complete --> [*] : ✓ Terminal Failed (Refund Complete)
underpaid_not_refunded --> [*] : ✓ Terminal Failed (Not Refunded)
underpaid-refunded --> underpaid-refunded-complete : Refund confirmed
underpaid-refunded --> underpaid-not-refunded : No refund wallet configured
underpaid-refunded-complete --> [*] : ✓ Terminal Failed (Refund Complete)
underpaid-not-refunded --> [*] : ✓ Terminal Failed (Not Refunded)
%% Out of stock refund flow
out_of_stock_refunded --> out_of_stock_refunded_complete : Refund confirmed
out_of_stock_refunded --> out_of_stock_not_refunded : No refund wallet configured
out_of_stock_refunded_complete --> [*] : ✓ Terminal Failed (Refund Complete)
out_of_stock_not_refunded --> [*] : ✓ Terminal Failed (Not Refunded)
out-of-stock-refunded --> out-of-stock-refunded-complete : Refund confirmed
out-of-stock-refunded --> out-of-stock-not-refunded : No refund wallet configured
out-of-stock-refunded-complete --> [*] : ✓ Terminal Failed (Refund Complete)
out-of-stock-not-refunded --> [*] : ✓ Terminal Failed (Not Refunded)
%% Double payment refund flow
doublepay_refunded --> doublepay_refunded_complete : Refund confirmed
doublepay_refunded --> doublepay_not_refunded : No refund wallet configured
doublepay_refunded_complete --> [*] : ✓ Terminal Failed (Refund Complete)
doublepay_not_refunded --> [*] : ✓ Terminal Failed (Not Refunded)
doublepay-refunded --> doublepay-refunded-complete : Refund confirmed
doublepay-refunded --> doublepay-not-refunded : No refund wallet configured
doublepay-refunded-complete --> [*] : ✓ Terminal Failed (Refund Complete)
doublepay-not-refunded --> [*] : ✓ Terminal Failed (Not Refunded)
%% User cancellation (always terminal, only from pending)
cancelled --> [*] : ✓ Terminal Failed (Cancelled)
@ -71,19 +71,19 @@ stateDiagram-v2
classDef processingState fill:#cce5ff,stroke:#004085,color:#004085
%% Successful payments (customer received product)
class confirmed,confirmed_complete,confirmed_overpay_refunded_complete,confirmed_overpay_not_refunded successState
class confirmed,confirmed-complete,confirmed-overpay-refunded-complete,confirmed-overpay-not-refunded successState
%% Initial/waiting states (entry points that don't come from 'received')
class pending,latepay_refunded,doublepay_refunded initialWaitingState
class pending,latepay-refunded,doublepay-refunded initialWaitingState
%% Active refund processing states
class confirmed_overpay_refunded,underpaid_refunded,out_of_stock_refunded refundState
class confirmed-overpay-refunded,underpaid-refunded,out-of-stock-refunded refundState
%% Failed payments (customer did not receive product)
class expired,cancelled,latepay_refunded_complete,latepay_not_refunded,underpaid_refunded_complete,underpaid_not_refunded,out_of_stock_refunded_complete,out_of_stock_not_refunded,doublepay_refunded_complete,doublepay_not_refunded failedState
class expired,cancelled,latepay-refunded-complete,latepay-not-refunded,underpaid-refunded-complete,underpaid-not-refunded,out-of-stock-refunded-complete,out-of-stock-not-refunded,doublepay-refunded-complete,doublepay-not-refunded failedState
%% Processing states
class received,confirmed_overpay processingState
class received,confirmed-overpay processingState
```
## Semantic State Groups
@ -94,8 +94,8 @@ The state machine uses semantic groups to categorize states by business logic pu
Entry point states that don't transition from `received` - they represent the start of payment flows:
- **`pending`** - Initial state for new payment requests
- **`latepay_refunded`** - Initial state for late payment objects (payments received after expiration)
- **`doublepay_refunded`** - Initial state for duplicate payment objects (separate payment instances)
- **`latepay-refunded`** - Initial state for late payment objects (payments received after expiration)
- **`doublepay-refunded`** - Initial state for duplicate payment objects (separate payment instances)
**Business Logic**: These states represent separate payment flows and are processed with Priority 0-2 depending on their nature.
@ -103,9 +103,9 @@ Entry point states that don't transition from `received` - they represent the st
Customer received their product - invoices are preserved:
- **`confirmed`** - Normal successful payment (exact amount, confirmed)
- **`confirmed_complete`** - Confirmed payment that has been swept to cold storage
- **`confirmed_overpay_refunded_complete`** - Overpaid, customer got product + refund
- **`confirmed_overpay_not_refunded`** - Overpaid, customer got product, no refund wallet configured
- **`confirmed-complete`** - Confirmed payment that has been swept to cold storage
- **`confirmed-overpay-refunded-complete`** - Overpaid, customer got product + refund
- **`confirmed-overpay-not-refunded`** - Overpaid, customer got product, no refund wallet configured
**Business Logic**: `is_successful_payment() = True`, `should_keep_invoice() = True`
@ -114,18 +114,18 @@ Customer did not receive product - invoices are deleted:
- **`expired`** - Payment window expired before any blockchain detection
- **`cancelled`** - User cancelled payment (only from pending)
- **`*_refunded_complete`** - Failed payments with completed refunds
- **`*_not_refunded`** - Failed payments with no refund wallet configured
- **`*-refunded-complete`** - Failed payments with completed refunds
- **`*-not-refunded`** - Failed payments with no refund wallet configured
**Business Logic**: `is_failed_payment() = True`, `should_keep_invoice() = False`
### 🟡 **Refund Processing States** (Yellow)
Active refund workflows - intermediate states:
- **`confirmed_overpay_refunded`** - Overpayment refund in progress (customer got product)
- **`underpaid_refunded`** - Underpayment refund in progress
- **`out_of_stock_refunded`** - Out of stock refund in progress
- **Note**: `latepay_refunded` and `doublepay_refunded` are Initial/Waiting states, not regular refund processing
- **`confirmed-overpay-refunded`** - Overpayment refund in progress (customer got product)
- **`underpaid-refunded`** - Underpayment refund in progress
- **`out-of-stock-refunded`** - Out of stock refund in progress
- **Note**: `latepay-refunded` and `doublepay-refunded` are Initial/Waiting states, not regular refund processing
**Business Logic**: Priority 0 processing (highest), actively monitored for confirmation
@ -133,7 +133,7 @@ Active refund workflows - intermediate states:
Active payment processing states:
- **`received`** - Payment detected on blockchain, being processed
- **`confirmed_overpay`** - Overpayment confirmed, deciding refund action
- **`confirmed-overpay`** - Overpayment confirmed, deciding refund action
**Business Logic**: Priority 1-3 processing, confirmation monitoring
@ -153,8 +153,8 @@ All status constants use past-tense naming for consistency:
### **Rule 3: Entry Points vs Transitions**
Some states are entry points for new payment objects, not transitions from existing payments:
- `pending` - Entry point for new payments
- `latepay_refunded` - Entry point for late payment objects (created after expiration)
- `doublepay_refunded` - Entry point for duplicate payment objects
- `latepay-refunded` - Entry point for late payment objects (created after expiration)
- `doublepay-refunded` - Entry point for duplicate payment objects
### **Rule 4: Invoice Preservation Logic**
```python
@ -168,7 +168,7 @@ should_keep_invoice() = is_successful_payment()
The crypto watcher processes payments by priority to ensure proper fund flow and customer service:
### **Priority 0 (Highest): Customer Refunds**
- `doublepay_refunded`, `latepay_refunded`, `underpaid_refunded`, `out_of_stock_refunded`
- `doublepay-refunded`, `latepay-refunded`, `underpaid-refunded`, `out-of-stock-refunded`
- **Rationale**: Customer service is highest priority
### **Priority 1: New Incoming Payments**
@ -180,50 +180,50 @@ The crypto watcher processes payments by priority to ensure proper fund flow and
- **Rationale**: General processing tasks
### **Priority 3: Auto-Sweep to Shop Owner**
- `confirmed`, `confirmed_overpay`
- `confirmed`, `confirmed-overpay`
- **Rationale**: Move confirmed funds to shop owner
### **Priority 4 (Lowest): Restocking Fee Sweeps**
- `*_refunded_complete` states
- `*-refunded-complete` states
- **Rationale**: Most dangerous operation, requires high confirmations, done last
## Business Logic Flows
### **Normal Payment Flow**
```
pending → received → confirmed → confirmed_complete ✅
pending → received → confirmed → confirmed-complete ✅
```
Customer pays exact amount, gets product, invoice kept, funds swept to cold storage.
### **Overpayment Flow**
```
pending → received → confirmed_overpay → confirmed_overpay_refunded → confirmed_overpay_refunded_complete ✅
pending → received → confirmed-overpay → confirmed-overpay-refunded → confirmed-overpay-refunded-complete ✅
```
Customer overpays, gets product, gets refund, invoice kept.
### **Late Payment Flow**
```
Original: pending → expired ❌
New object: latepay_refunded → latepay_refunded_complete ❌
New object: latepay-refunded → latepay-refunded-complete ❌
```
Original payment expires. Late payment creates new object, gets refunded, invoice deleted.
### **Underpayment Flow**
```
pending → received → underpaid_refunded → underpaid_refunded_complete ❌
pending → received → underpaid-refunded → underpaid-refunded-complete ❌
```
Customer pays too little, gets refund, no product, invoice deleted.
### **Duplicate Payment Flow**
```
Original: pending → received → confirmed ✅
Duplicate: doublepay_refunded → doublepay_refunded_complete ❌
Duplicate: doublepay-refunded → doublepay-refunded-complete ❌
```
First payment succeeds, duplicate creates separate object and gets refunded.
### **Out of Stock Flow**
```
pending → received → out_of_stock_refunded → out_of_stock_refunded_complete ❌
pending → received → out-of-stock-refunded → out-of-stock-refunded-complete ❌
```
Product unavailable, customer gets refund, no product, invoice deleted.
@ -237,15 +237,15 @@ User cancels before payment detected, invoice deleted.
**Successful Terminals** (keep invoice):
- `confirmed` - Normal success (awaiting sweep)
- `confirmed_complete` - Normal success + swept to cold storage
- `confirmed_overpay_refunded_complete` - Overpaid + refunded
- `confirmed_overpay_not_refunded` - Overpaid, no refund wallet
- `confirmed-complete` - Normal success + swept to cold storage
- `confirmed-overpay-refunded-complete` - Overpaid + refunded
- `confirmed-overpay-not-refunded` - Overpaid, no refund wallet
**Failed Terminals** (delete invoice):
- `expired` - Never paid
- `cancelled` - User cancelled
- `*_refunded_complete` - Failed + refunded
- `*_not_refunded` - Failed, no refund wallet
- `*-refunded-complete` - Failed + refunded
- `*-not-refunded` - Failed, no refund wallet
## State Transition Validation

90
docs/state-machine.dot
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@ -4,61 +4,61 @@ digraph G {
edge [penwidth=1.5, fontsize=10, fontname="Arial"];
"[*]" [shape=circle, label="", width=0.2, fillcolor=black, style=filled];
"pending" [fillcolor="#e7f3ff", fontcolor="#0056b3", color="#0056b3", fontsize=12];
"doublepay_refunded" [fillcolor="#e7f3ff", fontcolor="#0056b3", color="#0056b3", fontsize=12];
"latepay_refunded" [fillcolor="#e7f3ff", fontcolor="#0056b3", color="#0056b3", fontsize=12];
"doublepay-refunded" [fillcolor="#e7f3ff", fontcolor="#0056b3", color="#0056b3", fontsize=12];
"latepay-refunded" [fillcolor="#e7f3ff", fontcolor="#0056b3", color="#0056b3", fontsize=12];
"received" [fillcolor="#cce5ff", fontcolor="#004085", color="#004085", fontsize=12];
"expired" [fillcolor="#f8d7da", fontcolor="#721c24", color="#721c24", fontsize=12];
"cancelled" [fillcolor="#f8d7da", fontcolor="#721c24", color="#721c24", fontsize=12];
"confirmed" [fillcolor="#d4edda", fontcolor="#155724", color="#155724", fontsize=12];
"confirmed_complete" [fillcolor="#d4edda", fontcolor="#155724", color="#155724", fontsize=12];
"confirmed_overpay" [fillcolor="#cce5ff", fontcolor="#004085", color="#004085", fontsize=12];
"underpaid_refunded" [fillcolor="#fff3cd", fontcolor="#856404", color="#856404", fontsize=12];
"out_of_stock_refunded" [fillcolor="#fff3cd", fontcolor="#856404", color="#856404", fontsize=12];
"confirmed_overpay_refunded" [fillcolor="#fff3cd", fontcolor="#856404", color="#856404", fontsize=12];
"confirmed_overpay_refunded_complete" [fillcolor="#d4edda", fontcolor="#155724", color="#155724", fontsize=12];
"confirmed_overpay_not_refunded" [fillcolor="#d4edda", fontcolor="#155724", color="#155724", fontsize=12];
"latepay_refunded_complete" [fillcolor="#f8d7da", fontcolor="#721c24", color="#721c24", fontsize=12];
"latepay_not_refunded" [fillcolor="#f8d7da", fontcolor="#721c24", color="#721c24", fontsize=12];
"underpaid_refunded_complete" [fillcolor="#f8d7da", fontcolor="#721c24", color="#721c24", fontsize=12];
"underpaid_not_refunded" [fillcolor="#f8d7da", fontcolor="#721c24", color="#721c24", fontsize=12];
"out_of_stock_refunded_complete" [fillcolor="#f8d7da", fontcolor="#721c24", color="#721c24", fontsize=12];
"out_of_stock_not_refunded" [fillcolor="#f8d7da", fontcolor="#721c24", color="#721c24", fontsize=12];
"doublepay_refunded_complete" [fillcolor="#f8d7da", fontcolor="#721c24", color="#721c24", fontsize=12];
"doublepay_not_refunded" [fillcolor="#f8d7da", fontcolor="#721c24", color="#721c24", fontsize=12];
"confirmed-complete" [fillcolor="#d4edda", fontcolor="#155724", color="#155724", fontsize=12];
"confirmed-overpay" [fillcolor="#cce5ff", fontcolor="#004085", color="#004085", fontsize=12];
"underpaid-refunded" [fillcolor="#fff3cd", fontcolor="#856404", color="#856404", fontsize=12];
"out-of-stock-refunded" [fillcolor="#fff3cd", fontcolor="#856404", color="#856404", fontsize=12];
"confirmed-overpay-refunded" [fillcolor="#fff3cd", fontcolor="#856404", color="#856404", fontsize=12];
"confirmed-overpay-refunded-complete" [fillcolor="#d4edda", fontcolor="#155724", color="#155724", fontsize=12];
"confirmed-overpay-not-refunded" [fillcolor="#d4edda", fontcolor="#155724", color="#155724", fontsize=12];
"latepay-refunded-complete" [fillcolor="#f8d7da", fontcolor="#721c24", color="#721c24", fontsize=12];
"latepay-not-refunded" [fillcolor="#f8d7da", fontcolor="#721c24", color="#721c24", fontsize=12];
"underpaid-refunded-complete" [fillcolor="#f8d7da", fontcolor="#721c24", color="#721c24", fontsize=12];
"underpaid-not-refunded" [fillcolor="#f8d7da", fontcolor="#721c24", color="#721c24", fontsize=12];
"out-of-stock-refunded-complete" [fillcolor="#f8d7da", fontcolor="#721c24", color="#721c24", fontsize=12];
"out-of-stock-not-refunded" [fillcolor="#f8d7da", fontcolor="#721c24", color="#721c24", fontsize=12];
"doublepay-refunded-complete" [fillcolor="#f8d7da", fontcolor="#721c24", color="#721c24", fontsize=12];
"doublepay-not-refunded" [fillcolor="#f8d7da", fontcolor="#721c24", color="#721c24", fontsize=12];
"terminated" [shape=doubleoctagon, fillcolor="#e0e0e0", fontcolor="#333333", color="#333333", fontsize=12];
"[*]" -> "pending";
"[*]" -> "doublepay_refunded" [label="Duplicate payment detected"];
"[*]" -> "latepay_refunded" [label="Late payment detected"];
"[*]" -> "doublepay-refunded" [label="Duplicate payment detected"];
"[*]" -> "latepay-refunded" [label="Late payment detected"];
"pending" -> "received" [label="Payment detected in mempool"];
"pending" -> "expired" [label="Payment timeout (never received)"];
"pending" -> "cancelled" [label="User cancellation"];
"received" -> "confirmed" [label="Sufficient payment + confirmations"];
"received" -> "confirmed_overpay" [label="Overpayment detected"];
"received" -> "underpaid_refunded" [label="Underpayment detected"];
"received" -> "out_of_stock_refunded" [label="Product unavailable"];
"confirmed" -> "confirmed_complete" [label="Swept to cold storage"];
"confirmed_complete" -> "terminated" [label="✓ Terminal Success"];
"confirmed_overpay" -> "confirmed_overpay_refunded" [label="Initiate refund"];
"confirmed_overpay_refunded" -> "confirmed_overpay_refunded_complete" [label="Refund confirmed"];
"confirmed_overpay_refunded" -> "confirmed_overpay_not_refunded" [label="No refund wallet configured"];
"confirmed_overpay_refunded_complete" -> "terminated" [label="✓ Terminal Success"];
"confirmed_overpay_not_refunded" -> "terminated" [label="✓ Terminal Success (Not Refunded)"];
"received" -> "confirmed-overpay" [label="Overpayment detected"];
"received" -> "underpaid-refunded" [label="Underpayment detected"];
"received" -> "out-of-stock-refunded" [label="Product unavailable"];
"confirmed" -> "confirmed-complete" [label="Swept to cold storage"];
"confirmed-complete" -> "terminated" [label="✓ Terminal Success"];
"confirmed-overpay" -> "confirmed-overpay-refunded" [label="Initiate refund"];
"confirmed-overpay-refunded" -> "confirmed-overpay-refunded-complete" [label="Refund confirmed"];
"confirmed-overpay-refunded" -> "confirmed-overpay-not-refunded" [label="No refund wallet configured"];
"confirmed-overpay-refunded-complete" -> "terminated" [label="✓ Terminal Success"];
"confirmed-overpay-not-refunded" -> "terminated" [label="✓ Terminal Success (Not Refunded)"];
"expired" -> "terminated" [label="✓ Terminal Failed (Expired)"];
"latepay_refunded" -> "latepay_refunded_complete" [label="Refund confirmed"];
"latepay_refunded" -> "latepay_not_refunded" [label="No refund wallet configured"];
"latepay_refunded_complete" -> "terminated" [label="✓ Terminal Failed (Refund Complete)"];
"latepay_not_refunded" -> "terminated" [label="✓ Terminal Failed (Not Refunded)"];
"underpaid_refunded" -> "underpaid_refunded_complete" [label="Refund confirmed"];
"underpaid_refunded" -> "underpaid_not_refunded" [label="No refund wallet configured"];
"underpaid_refunded_complete" -> "terminated" [label="✓ Terminal Failed (Refund Complete)"];
"underpaid_not_refunded" -> "terminated" [label="✓ Terminal Failed (Not Refunded)"];
"out_of_stock_refunded" -> "out_of_stock_refunded_complete" [label="Refund confirmed"];
"out_of_stock_refunded" -> "out_of_stock_not_refunded" [label="No refund wallet configured"];
"out_of_stock_refunded_complete" -> "terminated" [label="✓ Terminal Failed (Refund Complete)"];
"out_of_stock_not_refunded" -> "terminated" [label="✓ Terminal Failed (Not Refunded)"];
"doublepay_refunded" -> "doublepay_refunded_complete" [label="Refund confirmed"];
"doublepay_refunded" -> "doublepay_not_refunded" [label="No refund wallet configured"];
"doublepay_refunded_complete" -> "terminated" [label="✓ Terminal Failed (Refund Complete)"];
"doublepay_not_refunded" -> "terminated" [label="✓ Terminal Failed (Not Refunded)"];
"latepay-refunded" -> "latepay-refunded-complete" [label="Refund confirmed"];
"latepay-refunded" -> "latepay-not-refunded" [label="No refund wallet configured"];
"latepay-refunded-complete" -> "terminated" [label="✓ Terminal Failed (Refund Complete)"];
"latepay-not-refunded" -> "terminated" [label="✓ Terminal Failed (Not Refunded)"];
"underpaid-refunded" -> "underpaid-refunded-complete" [label="Refund confirmed"];
"underpaid-refunded" -> "underpaid-not-refunded" [label="No refund wallet configured"];
"underpaid-refunded-complete" -> "terminated" [label="✓ Terminal Failed (Refund Complete)"];
"underpaid-not-refunded" -> "terminated" [label="✓ Terminal Failed (Not Refunded)"];
"out-of-stock-refunded" -> "out-of-stock-refunded-complete" [label="Refund confirmed"];
"out-of-stock-refunded" -> "out-of-stock-not-refunded" [label="No refund wallet configured"];
"out-of-stock-refunded-complete" -> "terminated" [label="✓ Terminal Failed (Refund Complete)"];
"out-of-stock-not-refunded" -> "terminated" [label="✓ Terminal Failed (Not Refunded)"];
"doublepay-refunded" -> "doublepay-refunded-complete" [label="Refund confirmed"];
"doublepay-refunded" -> "doublepay-not-refunded" [label="No refund wallet configured"];
"doublepay-refunded-complete" -> "terminated" [label="✓ Terminal Failed (Refund Complete)"];
"doublepay-not-refunded" -> "terminated" [label="✓ Terminal Failed (Not Refunded)"];
"cancelled" -> "terminated" [label="✓ Terminal Failed (Cancelled)"];
}

573
docs/state-machine.dot.svg
View file

@ -4,385 +4,398 @@
<!-- Generated by graphviz version 12.2.1 (20241206.2353)
-->
<!-- Title: G Pages: 1 -->
<svg width="1684pt" height="698pt"
viewBox="0.00 0.00 1684.38 697.74" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
<g id="graph0" class="graph" transform="scale(1 1) rotate(0) translate(4 693.74)">
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<title>[*]&#45;&gt;pending</title>
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<title>[*]&#45;&gt;doublepay_refunded</title>
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<title>[*]&#45;&gt;doublepay&#45;refunded</title>
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<title>latepay_refunded</title>
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<title>[*]&#45;&gt;latepay&#45;refunded</title>
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<title>received</title>
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<title>pending&#45;&gt;received</title>
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<title>expired</title>
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<title>pending&#45;&gt;expired</title>
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<g id="node7" class="node">
<title>cancelled</title>
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<title>pending&#45;&gt;cancelled</title>
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<title>doublepay_refunded_complete</title>
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<title>doublepay_refunded&#45;&gt;doublepay_refunded_complete</title>
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<title>doublepay_not_refunded</title>
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<title>doublepay_refunded&#45;&gt;doublepay_not_refunded</title>
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<title>doublepay&#45;refunded&#45;&gt;doublepay&#45;refunded&#45;complete</title>
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<title>doublepay&#45;not&#45;refunded</title>
<path fill="#f8d7da" stroke="#721c24" stroke-width="2" d="M1349.9,-149.41C1349.9,-149.41 1230.4,-149.41 1230.4,-149.41 1224.4,-149.41 1218.4,-143.41 1218.4,-137.41 1218.4,-137.41 1218.4,-125.41 1218.4,-125.41 1218.4,-119.41 1224.4,-113.41 1230.4,-113.41 1230.4,-113.41 1349.9,-113.41 1349.9,-113.41 1355.9,-113.41 1361.9,-119.41 1361.9,-125.41 1361.9,-125.41 1361.9,-137.41 1361.9,-137.41 1361.9,-143.41 1355.9,-149.41 1349.9,-149.41"/>
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<g id="edge18" class="edge">
<title>latepay_refunded&#45;&gt;latepay_refunded_complete</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M947.71,-77.91C1004.3,-77.91 1094.05,-77.91 1162.18,-77.91"/>
<polygon fill="black" stroke="black" stroke-width="1.5" points="1161.93,-81.41 1171.93,-77.91 1161.93,-74.41 1161.93,-81.41"/>
<text text-anchor="middle" x="1060.9" y="-80.41" font-family="Arial" font-size="10.00">Refund confirmed</text>
<!-- doublepay&#45;refunded&#45;&gt;doublepay&#45;not&#45;refunded -->
<g id="edge32" class="edge">
<title>doublepay&#45;refunded&#45;&gt;doublepay&#45;not&#45;refunded</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M995.5,-158.15C1008.2,-156.89 1021.48,-155.59 1033.9,-154.41 1091.19,-148.96 1155.74,-143.15 1205.6,-138.73"/>
<polygon fill="black" stroke="black" stroke-width="1.5" points="1205.7,-142.23 1215.36,-137.86 1205.09,-135.26 1205.7,-142.23"/>
<text text-anchor="middle" x="1098.4" y="-156.91" font-family="Arial" font-size="10.00">No refund wallet configured</text>
</g>
<!-- latepay_not_refunded -->
<!-- latepay&#45;refunded&#45;complete -->
<g id="node16" class="node">
<title>latepay_not_refunded</title>
<path fill="#f8d7da" stroke="#721c24" stroke-width="2" d="M1311.28,-41.91C1311.28,-41.91 1203.03,-41.91 1203.03,-41.91 1197.03,-41.91 1191.03,-35.91 1191.03,-29.91 1191.03,-29.91 1191.03,-17.91 1191.03,-17.91 1191.03,-11.91 1197.03,-5.91 1203.03,-5.91 1203.03,-5.91 1311.28,-5.91 1311.28,-5.91 1317.28,-5.91 1323.28,-11.91 1323.28,-17.91 1323.28,-17.91 1323.28,-29.91 1323.28,-29.91 1323.28,-35.91 1317.28,-41.91 1311.28,-41.91"/>
<text text-anchor="middle" x="1257.15" y="-19.64" font-family="Arial" font-size="12.00" fill="#721c24">latepay_not_refunded</text>
<title>latepay&#45;refunded&#45;complete</title>
<path fill="#f8d7da" stroke="#721c24" stroke-width="2" d="M1357.4,-95.41C1357.4,-95.41 1222.9,-95.41 1222.9,-95.41 1216.9,-95.41 1210.9,-89.41 1210.9,-83.41 1210.9,-83.41 1210.9,-71.41 1210.9,-71.41 1210.9,-65.41 1216.9,-59.41 1222.9,-59.41 1222.9,-59.41 1357.4,-59.41 1357.4,-59.41 1363.4,-59.41 1369.4,-65.41 1369.4,-71.41 1369.4,-71.41 1369.4,-83.41 1369.4,-83.41 1369.4,-89.41 1363.4,-95.41 1357.4,-95.41"/>
<text text-anchor="middle" x="1290.15" y="-73.13" font-family="Arial" font-size="12.00" fill="#721c24">latepay&#45;refunded&#45;complete</text>
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<!-- latepay&#45;refunded&#45;&gt;latepay&#45;refunded&#45;complete -->
<g id="edge19" class="edge">
<title>latepay_refunded&#45;&gt;latepay_not_refunded</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M947.64,-69.39C963.37,-66.95 980.56,-64.3 996.4,-61.91 1057.42,-52.71 1126.55,-42.61 1178.15,-35.14"/>
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<text text-anchor="middle" x="1060.9" y="-64.41" font-family="Arial" font-size="10.00">No refund wallet configured</text>
<title>latepay&#45;refunded&#45;&gt;latepay&#45;refunded&#45;complete</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M986.7,-77.41C1042.29,-77.41 1130.86,-77.41 1197.82,-77.41"/>
<polygon fill="black" stroke="black" stroke-width="1.5" points="1197.79,-80.91 1207.79,-77.41 1197.79,-73.91 1197.79,-80.91"/>
<text text-anchor="middle" x="1098.4" y="-79.91" font-family="Arial" font-size="10.00">Refund confirmed</text>
</g>
<!-- latepay&#45;not&#45;refunded -->
<g id="node17" class="node">
<title>latepay&#45;not&#45;refunded</title>
<path fill="#f8d7da" stroke="#721c24" stroke-width="2" d="M1341.28,-41.41C1341.28,-41.41 1239.03,-41.41 1239.03,-41.41 1233.03,-41.41 1227.03,-35.41 1227.03,-29.41 1227.03,-29.41 1227.03,-17.41 1227.03,-17.41 1227.03,-11.41 1233.03,-5.41 1239.03,-5.41 1239.03,-5.41 1341.28,-5.41 1341.28,-5.41 1347.28,-5.41 1353.28,-11.41 1353.28,-17.41 1353.28,-17.41 1353.28,-29.41 1353.28,-29.41 1353.28,-35.41 1347.28,-41.41 1341.28,-41.41"/>
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<!-- latepay&#45;refunded&#45;&gt;latepay&#45;not&#45;refunded -->
<g id="edge20" class="edge">
<title>latepay&#45;refunded&#45;&gt;latepay&#45;not&#45;refunded</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M986.82,-68.83C1002.01,-66.4 1018.61,-63.77 1033.9,-61.41 1094.57,-52.04 1163.41,-41.81 1214.3,-34.33"/>
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<text text-anchor="middle" x="1098.4" y="-63.91" font-family="Arial" font-size="10.00">No refund wallet configured</text>
</g>
<!-- confirmed -->
<g id="node8" class="node">
<title>confirmed</title>
<path fill="#d4edda" stroke="#155724" stroke-width="2" d="M1083.15,-642.91C1083.15,-642.91 1038.65,-642.91 1038.65,-642.91 1032.65,-642.91 1026.65,-636.91 1026.65,-630.91 1026.65,-630.91 1026.65,-618.91 1026.65,-618.91 1026.65,-612.91 1032.65,-606.91 1038.65,-606.91 1038.65,-606.91 1083.15,-606.91 1083.15,-606.91 1089.15,-606.91 1095.15,-612.91 1095.15,-618.91 1095.15,-618.91 1095.15,-630.91 1095.15,-630.91 1095.15,-636.91 1089.15,-642.91 1083.15,-642.91"/>
<text text-anchor="middle" x="1060.9" y="-620.64" font-family="Arial" font-size="12.00" fill="#155724">confirmed</text>
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<text text-anchor="middle" x="661.15" y="-575.13" font-family="Arial" font-size="12.00" fill="#155724">confirmed</text>
</g>
<!-- received&#45;&gt;confirmed -->
<g id="edge7" class="edge">
<title>received&#45;&gt;confirmed</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M377.95,-480.8C392.93,-492.88 413.7,-508.07 434.15,-517.91 482.84,-541.33 498.3,-539.67 551.15,-550.91 719.82,-586.8 923.67,-610.67 1013.53,-620.22"/>
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<text text-anchor="middle" x="626.9" y="-581.47" font-family="Arial" font-size="10.00">Sufficient payment + confirmations</text>
<path fill="none" stroke="black" stroke-width="1.5" d="M372.28,-450.33C387.01,-466.42 410.02,-489.12 434.15,-503.41 491.82,-537.55 566.94,-558.9 614.37,-569.99"/>
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<text text-anchor="middle" x="509.9" y="-564.15" font-family="Arial" font-size="10.00">Sufficient payment + confirmations</text>
</g>
<!-- confirmed_overpay -->
<g id="node9" class="node">
<title>confirmed_overpay</title>
<path fill="#cce5ff" stroke="#004085" stroke-width="2" d="M673.9,-541.91C673.9,-541.91 579.9,-541.91 579.9,-541.91 573.9,-541.91 567.9,-535.91 567.9,-529.91 567.9,-529.91 567.9,-517.91 567.9,-517.91 567.9,-511.91 573.9,-505.91 579.9,-505.91 579.9,-505.91 673.9,-505.91 673.9,-505.91 679.9,-505.91 685.9,-511.91 685.9,-517.91 685.9,-517.91 685.9,-529.91 685.9,-529.91 685.9,-535.91 679.9,-541.91 673.9,-541.91"/>
<text text-anchor="middle" x="626.9" y="-519.64" font-family="Arial" font-size="12.00" fill="#004085">confirmed_overpay</text>
</g>
<!-- received&#45;&gt;confirmed_overpay -->
<g id="edge8" class="edge">
<title>received&#45;&gt;confirmed_overpay</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M386.72,-468.96C427.46,-478.32 500.6,-495.13 555.31,-507.7"/>
<polygon fill="black" stroke="black" stroke-width="1.5" points="554.3,-511.05 564.83,-509.88 555.86,-504.23 554.3,-511.05"/>
<text text-anchor="middle" x="483.65" y="-504.59" font-family="Arial" font-size="10.00">Overpayment detected</text>
</g>
<!-- underpaid_refunded -->
<!-- confirmed&#45;overpay -->
<g id="node10" class="node">
<title>underpaid_refunded</title>
<path fill="#fff3cd" stroke="#856404" stroke-width="2" d="M942.4,-479.91C942.4,-479.91 842.4,-479.91 842.4,-479.91 836.4,-479.91 830.4,-473.91 830.4,-467.91 830.4,-467.91 830.4,-455.91 830.4,-455.91 830.4,-449.91 836.4,-443.91 842.4,-443.91 842.4,-443.91 942.4,-443.91 942.4,-443.91 948.4,-443.91 954.4,-449.91 954.4,-455.91 954.4,-455.91 954.4,-467.91 954.4,-467.91 954.4,-473.91 948.4,-479.91 942.4,-479.91"/>
<text text-anchor="middle" x="892.4" y="-457.64" font-family="Arial" font-size="12.00" fill="#856404">underpaid_refunded</text>
<title>confirmed&#45;overpay</title>
<path fill="#cce5ff" stroke="#004085" stroke-width="2" d="M706.65,-526.41C706.65,-526.41 615.65,-526.41 615.65,-526.41 609.65,-526.41 603.65,-520.41 603.65,-514.41 603.65,-514.41 603.65,-502.41 603.65,-502.41 603.65,-496.41 609.65,-490.41 615.65,-490.41 615.65,-490.41 706.65,-490.41 706.65,-490.41 712.65,-490.41 718.65,-496.41 718.65,-502.41 718.65,-502.41 718.65,-514.41 718.65,-514.41 718.65,-520.41 712.65,-526.41 706.65,-526.41"/>
<text text-anchor="middle" x="661.15" y="-504.13" font-family="Arial" font-size="12.00" fill="#004085">confirmed&#45;overpay</text>
</g>
<!-- received&#45;&gt;underpaid_refunded -->
<g id="edge9" class="edge">
<title>received&#45;&gt;underpaid_refunded</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M386.73,-461.91C469.35,-461.91 698.15,-461.91 817.22,-461.91"/>
<polygon fill="black" stroke="black" stroke-width="1.5" points="817.17,-465.41 827.17,-461.91 817.17,-458.41 817.17,-465.41"/>
<text text-anchor="middle" x="626.9" y="-464.41" font-family="Arial" font-size="10.00">Underpayment detected</text>
<!-- received&#45;&gt;confirmed&#45;overpay -->
<g id="edge8" class="edge">
<title>received&#45;&gt;confirmed&#45;overpay</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M386.86,-439.21C434.48,-451.27 527.13,-474.73 591.26,-490.96"/>
<polygon fill="black" stroke="black" stroke-width="1.5" points="590.13,-494.29 600.69,-493.35 591.85,-487.5 590.13,-494.29"/>
<text text-anchor="middle" x="509.9" y="-490.26" font-family="Arial" font-size="10.00">Overpayment detected</text>
</g>
<!-- out_of_stock_refunded -->
<!-- underpaid&#45;refunded -->
<g id="node11" class="node">
<title>out_of_stock_refunded</title>
<path fill="#fff3cd" stroke="#856404" stroke-width="2" d="M949.15,-387.91C949.15,-387.91 835.65,-387.91 835.65,-387.91 829.65,-387.91 823.65,-381.91 823.65,-375.91 823.65,-375.91 823.65,-363.91 823.65,-363.91 823.65,-357.91 829.65,-351.91 835.65,-351.91 835.65,-351.91 949.15,-351.91 949.15,-351.91 955.15,-351.91 961.15,-357.91 961.15,-363.91 961.15,-363.91 961.15,-375.91 961.15,-375.91 961.15,-381.91 955.15,-387.91 949.15,-387.91"/>
<text text-anchor="middle" x="892.4" y="-365.64" font-family="Arial" font-size="12.00" fill="#856404">out_of_stock_refunded</text>
<title>underpaid&#45;refunded</title>
<path fill="#fff3cd" stroke="#856404" stroke-width="2" d="M981.4,-449.41C981.4,-449.41 884.4,-449.41 884.4,-449.41 878.4,-449.41 872.4,-443.41 872.4,-437.41 872.4,-437.41 872.4,-425.41 872.4,-425.41 872.4,-419.41 878.4,-413.41 884.4,-413.41 884.4,-413.41 981.4,-413.41 981.4,-413.41 987.4,-413.41 993.4,-419.41 993.4,-425.41 993.4,-425.41 993.4,-437.41 993.4,-437.41 993.4,-443.41 987.4,-449.41 981.4,-449.41"/>
<text text-anchor="middle" x="932.9" y="-427.13" font-family="Arial" font-size="12.00" fill="#856404">underpaid&#45;refunded</text>
</g>
<!-- received&#45;&gt;out_of_stock_refunded -->
<!-- received&#45;&gt;underpaid&#45;refunded -->
<g id="edge9" class="edge">
<title>received&#45;&gt;underpaid&#45;refunded</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M386.58,-431.41C474.91,-431.41 732.32,-431.41 859.32,-431.41"/>
<polygon fill="black" stroke="black" stroke-width="1.5" points="859.29,-434.91 869.29,-431.41 859.29,-427.91 859.29,-434.91"/>
<text text-anchor="middle" x="661.15" y="-433.91" font-family="Arial" font-size="10.00">Underpayment detected</text>
</g>
<!-- out&#45;of&#45;stock&#45;refunded -->
<g id="node12" class="node">
<title>out&#45;of&#45;stock&#45;refunded</title>
<path fill="#fff3cd" stroke="#856404" stroke-width="2" d="M985.15,-387.41C985.15,-387.41 880.65,-387.41 880.65,-387.41 874.65,-387.41 868.65,-381.41 868.65,-375.41 868.65,-375.41 868.65,-363.41 868.65,-363.41 868.65,-357.41 874.65,-351.41 880.65,-351.41 880.65,-351.41 985.15,-351.41 985.15,-351.41 991.15,-351.41 997.15,-357.41 997.15,-363.41 997.15,-363.41 997.15,-375.41 997.15,-375.41 997.15,-381.41 991.15,-387.41 985.15,-387.41"/>
<text text-anchor="middle" x="932.9" y="-365.13" font-family="Arial" font-size="12.00" fill="#856404">out&#45;of&#45;stock&#45;refunded</text>
</g>
<!-- received&#45;&gt;out&#45;of&#45;stock&#45;refunded -->
<g id="edge10" class="edge">
<title>received&#45;&gt;out_of_stock_refunded</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M386.73,-456.63C467.93,-442.68 690.33,-404.46 810.99,-383.73"/>
<polygon fill="black" stroke="black" stroke-width="1.5" points="811.55,-387.18 820.81,-382.04 810.36,-380.29 811.55,-387.18"/>
<text text-anchor="middle" x="626.9" y="-430.55" font-family="Arial" font-size="10.00">Product unavailable</text>
<title>received&#45;&gt;out&#45;of&#45;stock&#45;refunded</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M386.58,-428.12C474.09,-418.69 727.61,-391.4 855.79,-377.6"/>
<polygon fill="black" stroke="black" stroke-width="1.5" points="855.96,-381.1 865.53,-376.55 855.22,-374.14 855.96,-381.1"/>
<text text-anchor="middle" x="661.15" y="-407.03" font-family="Arial" font-size="10.00">Product unavailable</text>
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<!-- terminated -->
<g id="node23" class="node">
<g id="node24" class="node">
<title>terminated</title>
<path fill="#e0e0e0" stroke="#333333" stroke-width="2" d="M1672.38,-313.43C1672.38,-313.43 1672.38,-318.4 1672.38,-318.4 1672.38,-320.88 1670.04,-324.21 1667.7,-325.06 1667.7,-325.06 1647.92,-332.22 1647.92,-332.22 1645.58,-333.07 1640.76,-333.91 1638.27,-333.91 1638.27,-333.91 1607.01,-333.91 1607.01,-333.91 1604.52,-333.91 1599.7,-333.07 1597.36,-332.22 1597.36,-332.22 1577.57,-325.06 1577.57,-325.06 1575.24,-324.21 1572.9,-320.88 1572.9,-318.4 1572.9,-318.4 1572.9,-313.43 1572.9,-313.43 1572.9,-310.94 1575.24,-307.61 1577.57,-306.76 1577.57,-306.76 1597.36,-299.6 1597.36,-299.6 1599.7,-298.76 1604.52,-297.91 1607.01,-297.91 1607.01,-297.91 1638.27,-297.91 1638.27,-297.91 1640.76,-297.91 1645.58,-298.76 1647.92,-299.6 1647.92,-299.6 1667.7,-306.76 1667.7,-306.76 1670.04,-307.61 1672.38,-310.94 1672.38,-313.43"/>
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<text text-anchor="middle" x="1622.64" y="-311.64" font-family="Arial" font-size="12.00" fill="#333333">terminated</text>
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<g id="edge18" class="edge">
<title>expired&#45;&gt;terminated</title>
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<g id="edge35" class="edge">
<title>cancelled&#45;&gt;terminated</title>
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<!-- confirmed&#45;complete -->
<g id="node9" class="node">
<title>confirmed&#45;complete</title>
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<g id="edge11" class="edge">
<title>confirmed&#45;&gt;terminated</title>
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<text text-anchor="middle" x="1257.15" y="-680.24" font-family="Arial" font-size="10.00">✓ Terminal Success</text>
<title>confirmed&#45;&gt;confirmed&#45;complete</title>
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<g id="node12" class="node">
<title>confirmed_overpay_refunded</title>
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<g id="edge12" class="edge">
<title>confirmed_overpay&#45;&gt;confirmed_overpay_refunded</title>
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<text text-anchor="middle" x="754.52" y="-531.13" font-family="Arial" font-size="10.00">Initiate refund</text>
<title>confirmed&#45;complete&#45;&gt;terminated</title>
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<text text-anchor="middle" x="1290.15" y="-678.64" font-family="Arial" font-size="10.00">✓ Terminal Success</text>
</g>
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<g id="node17" class="node">
<title>underpaid_refunded_complete</title>
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<g id="edge22" class="edge">
<title>underpaid_refunded&#45;&gt;underpaid_refunded_complete</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M955.35,-464.64C1009.91,-467.05 1090.42,-470.6 1154.42,-473.42"/>
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<text text-anchor="middle" x="1060.9" y="-474.32" font-family="Arial" font-size="10.00">Refund confirmed</text>
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<g id="node18" class="node">
<title>underpaid_not_refunded</title>
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<g id="edge23" class="edge">
<title>underpaid_refunded&#45;&gt;underpaid_not_refunded</title>
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<text text-anchor="middle" x="1060.9" y="-453.41" font-family="Arial" font-size="10.00">No refund wallet configured</text>
</g>
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<g id="node19" class="node">
<title>out_of_stock_refunded_complete</title>
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<g id="edge26" class="edge">
<title>out_of_stock_refunded&#45;&gt;out_of_stock_refunded_complete</title>
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<text text-anchor="middle" x="1060.9" y="-372.41" font-family="Arial" font-size="10.00">Refund confirmed</text>
</g>
<!-- out_of_stock_not_refunded -->
<g id="node20" class="node">
<title>out_of_stock_not_refunded</title>
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<g id="edge27" class="edge">
<title>out_of_stock_refunded&#45;&gt;out_of_stock_not_refunded</title>
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<g id="node13" class="node">
<title>confirmed_overpay_refunded_complete</title>
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<title>confirmed&#45;overpay&#45;refunded</title>
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<g id="edge13" class="edge">
<title>confirmed_overpay_refunded&#45;&gt;confirmed_overpay_refunded_complete</title>
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<text text-anchor="middle" x="1060.9" y="-569.34" font-family="Arial" font-size="10.00">Refund confirmed</text>
<title>confirmed&#45;overpay&#45;&gt;confirmed&#45;overpay&#45;refunded</title>
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<text text-anchor="middle" x="784.27" y="-525.14" font-family="Arial" font-size="10.00">Initiate refund</text>
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<g id="node14" class="node">
<title>confirmed_overpay_not_refunded</title>
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<g id="node18" class="node">
<title>underpaid&#45;refunded&#45;complete</title>
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<g id="edge14" class="edge">
<title>confirmed_overpay_refunded&#45;&gt;confirmed_overpay_not_refunded</title>
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<g id="edge23" class="edge">
<title>underpaid&#45;refunded&#45;&gt;underpaid&#45;refunded&#45;complete</title>
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<g id="edge15" class="edge">
<title>confirmed_overpay_refunded_complete&#45;&gt;terminated</title>
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<text text-anchor="middle" x="1469.9" y="-599.71" font-family="Arial" font-size="10.00">✓ Terminal Success</text>
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<title>underpaid&#45;not&#45;refunded</title>
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<g id="edge16" class="edge">
<title>confirmed_overpay_not_refunded&#45;&gt;terminated</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M1355.63,-529.7C1428.73,-526.16 1521.11,-517.07 1550.9,-493.91 1595.53,-459.21 1612.08,-392.1 1618.16,-350.93"/>
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<text text-anchor="middle" x="1469.9" y="-530.7" font-family="Arial" font-size="10.00">✓ Terminal Success (Not Refunded)</text>
</g>
<!-- latepay_refunded_complete&#45;&gt;terminated -->
<g id="edge20" class="edge">
<title>latepay_refunded_complete&#45;&gt;terminated</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M1340.17,-62.84C1404.26,-55.89 1492.05,-57.64 1550.9,-104.16 1605.07,-146.98 1618.11,-232.76 1621.02,-280.97"/>
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<text text-anchor="middle" x="1469.9" y="-107.41" font-family="Arial" font-size="10.00">✓ Terminal Failed (Refund Complete)</text>
</g>
<!-- latepay_not_refunded&#45;&gt;terminated -->
<g id="edge21" class="edge">
<title>latepay_not_refunded&#45;&gt;terminated</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M1323.99,-8.14C1389.15,3.31 1488.02,8.88 1550.9,-43.16 1587.54,-73.49 1609.34,-215.13 1617.69,-281.47"/>
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<text text-anchor="middle" x="1469.9" y="-46.41" font-family="Arial" font-size="10.00">✓ Terminal Failed (Not Refunded)</text>
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<!-- underpaid_refunded_complete&#45;&gt;terminated -->
<!-- underpaid&#45;refunded&#45;&gt;underpaid&#45;not&#45;refunded -->
<g id="edge24" class="edge">
<title>underpaid_refunded_complete&#45;&gt;terminated</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M1347.76,-482.36C1409.64,-481.19 1491.2,-470.82 1550.9,-430.91 1579.76,-411.62 1598.9,-376.17 1609.91,-349.7"/>
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<text text-anchor="middle" x="1469.9" y="-483.11" font-family="Arial" font-size="10.00">✓ Terminal Failed (Refund Complete)</text>
<title>underpaid&#45;refunded&#45;&gt;underpaid&#45;not&#45;refunded</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M994.16,-430.05C1052.56,-428.73 1141.59,-426.73 1206.56,-425.27"/>
<polygon fill="black" stroke="black" stroke-width="1.5" points="1206.62,-428.77 1216.54,-425.04 1206.47,-421.77 1206.62,-428.77"/>
<text text-anchor="middle" x="1098.4" y="-431.54" font-family="Arial" font-size="10.00">No refund wallet configured</text>
</g>
<!-- underpaid_not_refunded&#45;&gt;terminated -->
<g id="edge25" class="edge">
<title>underpaid_not_refunded&#45;&gt;terminated</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M1331.52,-421.3C1392.61,-416.79 1480.65,-404.74 1550.9,-372.91 1565.41,-366.34 1579.48,-356.08 1591.2,-346.07"/>
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<text text-anchor="middle" x="1469.9" y="-417.66" font-family="Arial" font-size="10.00">✓ Terminal Failed (Not Refunded)</text>
<!-- out&#45;of&#45;stock&#45;refunded&#45;complete -->
<g id="node20" class="node">
<title>out&#45;of&#45;stock&#45;refunded&#45;complete</title>
<path fill="#f8d7da" stroke="#721c24" stroke-width="2" d="M1368.65,-387.41C1368.65,-387.41 1211.65,-387.41 1211.65,-387.41 1205.65,-387.41 1199.65,-381.41 1199.65,-375.41 1199.65,-375.41 1199.65,-363.41 1199.65,-363.41 1199.65,-357.41 1205.65,-351.41 1211.65,-351.41 1211.65,-351.41 1368.65,-351.41 1368.65,-351.41 1374.65,-351.41 1380.65,-357.41 1380.65,-363.41 1380.65,-363.41 1380.65,-375.41 1380.65,-375.41 1380.65,-381.41 1374.65,-387.41 1368.65,-387.41"/>
<text text-anchor="middle" x="1290.15" y="-365.13" font-family="Arial" font-size="12.00" fill="#721c24">out&#45;of&#45;stock&#45;refunded&#45;complete</text>
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<!-- out_of_stock_refunded_complete&#45;&gt;terminated -->
<!-- out&#45;of&#45;stock&#45;refunded&#45;&gt;out&#45;of&#45;stock&#45;refunded&#45;complete -->
<g id="edge27" class="edge">
<title>out&#45;of&#45;stock&#45;refunded&#45;&gt;out&#45;of&#45;stock&#45;refunded&#45;complete</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M997.82,-369.41C1050.35,-369.41 1125.77,-369.41 1186.72,-369.41"/>
<polygon fill="black" stroke="black" stroke-width="1.5" points="1186.43,-372.91 1196.43,-369.41 1186.43,-365.91 1186.43,-372.91"/>
<text text-anchor="middle" x="1098.4" y="-371.91" font-family="Arial" font-size="10.00">Refund confirmed</text>
</g>
<!-- out&#45;of&#45;stock&#45;not&#45;refunded -->
<g id="node21" class="node">
<title>out&#45;of&#45;stock&#45;not&#45;refunded</title>
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<text text-anchor="middle" x="1290.15" y="-311.13" font-family="Arial" font-size="12.00" fill="#721c24">out&#45;of&#45;stock&#45;not&#45;refunded</text>
</g>
<!-- out&#45;of&#45;stock&#45;refunded&#45;&gt;out&#45;of&#45;stock&#45;not&#45;refunded -->
<g id="edge28" class="edge">
<title>out_of_stock_refunded_complete&#45;&gt;terminated</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M1354.48,-360.44C1411.78,-354.13 1485.77,-344.82 1550.9,-332.91 1554.22,-332.3 1557.62,-331.64 1561.04,-330.93"/>
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<text text-anchor="middle" x="1469.9" y="-359.37" font-family="Arial" font-size="10.00">✓ Terminal Failed (Refund Complete)</text>
<title>out&#45;of&#45;stock&#45;refunded&#45;&gt;out&#45;of&#45;stock&#45;not&#45;refunded</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M997.9,-359.06C1009.86,-357.16 1022.26,-355.2 1033.9,-353.41 1090.14,-344.72 1153.42,-335.3 1202.9,-328.01"/>
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<text text-anchor="middle" x="1098.4" y="-355.91" font-family="Arial" font-size="10.00">No refund wallet configured</text>
</g>
<!-- out_of_stock_not_refunded&#45;&gt;terminated -->
<!-- confirmed&#45;overpay&#45;refunded&#45;complete -->
<g id="node14" class="node">
<title>confirmed&#45;overpay&#45;refunded&#45;complete</title>
<path fill="#d4edda" stroke="#155724" stroke-width="2" d="M1387.4,-603.41C1387.4,-603.41 1192.9,-603.41 1192.9,-603.41 1186.9,-603.41 1180.9,-597.41 1180.9,-591.41 1180.9,-591.41 1180.9,-579.41 1180.9,-579.41 1180.9,-573.41 1186.9,-567.41 1192.9,-567.41 1192.9,-567.41 1387.4,-567.41 1387.4,-567.41 1393.4,-567.41 1399.4,-573.41 1399.4,-579.41 1399.4,-579.41 1399.4,-591.41 1399.4,-591.41 1399.4,-597.41 1393.4,-603.41 1387.4,-603.41"/>
<text text-anchor="middle" x="1290.15" y="-581.13" font-family="Arial" font-size="12.00" fill="#155724">confirmed&#45;overpay&#45;refunded&#45;complete</text>
</g>
<!-- confirmed&#45;overpay&#45;refunded&#45;&gt;confirmed&#45;overpay&#45;refunded&#45;complete -->
<g id="edge14" class="edge">
<title>confirmed&#45;overpay&#45;refunded&#45;&gt;confirmed&#45;overpay&#45;refunded&#45;complete</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M1016.83,-544.75C1022.61,-545.65 1028.34,-546.55 1033.9,-547.41 1077.62,-554.16 1125.58,-561.35 1168.01,-567.65"/>
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<text text-anchor="middle" x="1098.4" y="-568.88" font-family="Arial" font-size="10.00">Refund confirmed</text>
</g>
<!-- confirmed&#45;overpay&#45;not&#45;refunded -->
<g id="node15" class="node">
<title>confirmed&#45;overpay&#45;not&#45;refunded</title>
<path fill="#d4edda" stroke="#155724" stroke-width="2" d="M1371.28,-549.41C1371.28,-549.41 1209.03,-549.41 1209.03,-549.41 1203.03,-549.41 1197.03,-543.41 1197.03,-537.41 1197.03,-537.41 1197.03,-525.41 1197.03,-525.41 1197.03,-519.41 1203.03,-513.41 1209.03,-513.41 1209.03,-513.41 1371.28,-513.41 1371.28,-513.41 1377.28,-513.41 1383.28,-519.41 1383.28,-525.41 1383.28,-525.41 1383.28,-537.41 1383.28,-537.41 1383.28,-543.41 1377.28,-549.41 1371.28,-549.41"/>
<text text-anchor="middle" x="1290.15" y="-527.13" font-family="Arial" font-size="12.00" fill="#155724">confirmed&#45;overpay&#45;not&#45;refunded</text>
</g>
<!-- confirmed&#45;overpay&#45;refunded&#45;&gt;confirmed&#45;overpay&#45;not&#45;refunded -->
<g id="edge15" class="edge">
<title>confirmed&#45;overpay&#45;refunded&#45;&gt;confirmed&#45;overpay&#45;not&#45;refunded</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M1016.74,-531.41C1066.68,-531.41 1130.76,-531.41 1184.22,-531.41"/>
<polygon fill="black" stroke="black" stroke-width="1.5" points="1183.88,-534.91 1193.88,-531.41 1183.88,-527.91 1183.88,-534.91"/>
<text text-anchor="middle" x="1098.4" y="-533.91" font-family="Arial" font-size="10.00">No refund wallet configured</text>
</g>
<!-- confirmed&#45;overpay&#45;refunded&#45;complete&#45;&gt;terminated -->
<g id="edge16" class="edge">
<title>confirmed&#45;overpay&#45;refunded&#45;complete&#45;&gt;terminated</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M1400.13,-595.95C1459.54,-595.76 1530.68,-585.06 1579.4,-543.41 1636.35,-494.73 1648.14,-401.11 1650.16,-350.3"/>
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<text text-anchor="middle" x="1498.4" y="-598.72" font-family="Arial" font-size="10.00">✓ Terminal Success</text>
</g>
<!-- confirmed&#45;overpay&#45;not&#45;refunded&#45;&gt;terminated -->
<g id="edge17" class="edge">
<title>confirmed&#45;overpay&#45;not&#45;refunded&#45;&gt;terminated</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M1384.21,-529.17C1456.64,-525.63 1549.68,-516.55 1579.4,-493.41 1624,-458.66 1640.56,-391.56 1646.65,-350.41"/>
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<text text-anchor="middle" x="1498.4" y="-529.98" font-family="Arial" font-size="10.00">✓ Terminal Success (Not Refunded)</text>
</g>
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<g id="edge21" class="edge">
<title>latepay&#45;refunded&#45;complete&#45;&gt;terminated</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M1370.32,-62.87C1433.56,-55.93 1520.99,-57.42 1579.4,-103.66 1633.54,-146.52 1646.59,-232.28 1649.51,-280.47"/>
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<text text-anchor="middle" x="1498.4" y="-106.91" font-family="Arial" font-size="10.00">✓ Terminal Failed (Refund Complete)</text>
</g>
<!-- latepay&#45;not&#45;refunded&#45;&gt;terminated -->
<g id="edge22" class="edge">
<title>latepay&#45;not&#45;refunded&#45;&gt;terminated</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M1354.19,-8.27C1418.33,3.14 1516.93,9.1 1579.4,-42.66 1616.03,-73 1637.83,-214.63 1646.19,-280.97"/>
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<text text-anchor="middle" x="1498.4" y="-45.91" font-family="Arial" font-size="10.00">✓ Terminal Failed (Not Refunded)</text>
</g>
<!-- underpaid&#45;refunded&#45;complete&#45;&gt;terminated -->
<g id="edge25" class="edge">
<title>underpaid&#45;refunded&#45;complete&#45;&gt;terminated</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M1377.79,-481.99C1438.93,-481.08 1520.16,-471.13 1579.4,-431.41 1608.41,-411.95 1627.53,-376.19 1638.49,-349.5"/>
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<text text-anchor="middle" x="1498.4" y="-482.81" font-family="Arial" font-size="10.00">✓ Terminal Failed (Refund Complete)</text>
</g>
<!-- underpaid&#45;not&#45;refunded&#45;&gt;terminated -->
<g id="edge26" class="edge">
<title>underpaid&#45;not&#45;refunded&#45;&gt;terminated</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M1361.59,-420.73C1421.81,-416.2 1509.54,-404.17 1579.4,-372.41 1593.9,-365.81 1607.97,-355.55 1619.69,-345.54"/>
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<text text-anchor="middle" x="1498.4" y="-417.91" font-family="Arial" font-size="10.00">✓ Terminal Failed (Not Refunded)</text>
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<g id="edge29" class="edge">
<title>out_of_stock_not_refunded&#45;&gt;terminated</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M1338.37,-315.91C1403.7,-315.91 1494.79,-315.91 1555.87,-315.91"/>
<polygon fill="black" stroke="black" stroke-width="1.5" points="1555.78,-319.41 1565.78,-315.91 1555.78,-312.41 1555.78,-319.41"/>
<text text-anchor="middle" x="1469.9" y="-319.16" font-family="Arial" font-size="10.00">✓ Terminal Failed (Not Refunded)</text>
<title>out&#45;of&#45;stock&#45;refunded&#45;complete&#45;&gt;terminated</title>
<path fill="none" stroke="black" stroke-width="1.5" d="M1381.45,-360.35C1438.46,-354.01 1513.53,-344.51 1579.4,-332.41 1582.72,-331.8 1586.12,-331.13 1589.54,-330.42"/>
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<text text-anchor="middle" x="1498.4" y="-358.77" font-family="Arial" font-size="10.00">✓ Terminal Failed (Refund Complete)</text>
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<g id="edge32" class="edge">
<title>doublepay_refunded_complete&#45;&gt;terminated</title>
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<text text-anchor="middle" x="1469.9" y="-208.41" font-family="Arial" font-size="10.00">✓ Terminal Failed (Refund Complete)</text>
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<g id="edge30" class="edge">
<title>out&#45;of&#45;stock&#45;not&#45;refunded&#45;&gt;terminated</title>
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<text text-anchor="middle" x="1498.4" y="-318.66" font-family="Arial" font-size="10.00">✓ Terminal Failed (Not Refunded)</text>
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<!-- doublepay&#45;refunded&#45;complete&#45;&gt;terminated -->
<g id="edge33" class="edge">
<title>doublepay_not_refunded&#45;&gt;terminated</title>
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<text text-anchor="middle" x="1469.9" y="-169.41" font-family="Arial" font-size="10.00">✓ Terminal Failed (Not Refunded)</text>
<title>doublepay&#45;refunded&#45;complete&#45;&gt;terminated</title>
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<g id="edge34" class="edge">
<title>doublepay&#45;not&#45;refunded&#45;&gt;terminated</title>
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