Option to add installment to contract/account to increace balance amount same as payment and can be deleted which will reduce balance amount by new amount of the installment deleted, call later added badge to show active call laters

app/Models/Account.php

@@ -10,9 +10,10 @@
 
 class Account extends Model
 {
+    use HasFactory;
+
     /** @use HasFactory<\Database\Factories\Person/AccountFactory> */
     use SoftDeletes;
-    use HasFactory;
 
     protected $fillable = [
         'reference',
@@ -58,6 +59,11 @@ public function payments(): HasMany
         return $this->hasMany(\App\Models\Payment::class);
     }
 
+    public function installments(): HasMany
+    {
+        return $this->hasMany(\App\Models\Installment::class);
+    }
+
     public function bookings(): HasMany
     {
         return $this->hasMany(\App\Models\Booking::class);

app/Models/Installment.php

@@ -0,0 +1,46 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+use Illuminate\Database\Eloquent\SoftDeletes;
+
+class Installment extends Model
+{
+    use HasFactory;
+    use SoftDeletes;
+
+    protected $fillable = [
+        'account_id',
+        'amount',
+        'balance_before',
+        'currency',
+        'reference',
+        'installment_at',
+        'meta',
+        'created_by',
+        'activity_id',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'installment_at' => 'datetime',
+            'meta' => 'array',
+            'amount' => 'decimal:4',
+            'balance_before' => 'decimal:4',
+        ];
+    }
+
+    public function account(): BelongsTo
+    {
+        return $this->belongsTo(Account::class);
+    }
+
+    public function activity(): BelongsTo
+    {
+        return $this->belongsTo(Activity::class);
+    }
+}

app/Models/InstallmentSetting.php

@@ -0,0 +1,19 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Factories\HasFactory;
+use Illuminate\Database\Eloquent\Model;
+
+class InstallmentSetting extends Model
+{
+    use HasFactory;
+
+    protected $fillable = [
+        'default_currency',
+        'create_activity_on_installment',
+        'default_decision_id',
+        'default_action_id',
+        'activity_note_template',
+    ];
+}