odoo/addons/hr_expense/hr_expense_workflow.xml

<?xml version="1.0" ?>
<terp>
    <data>
        
        <!-- Roles definition -->
        
        <record model="res.roles" id="HR">
            <field name="name">Human Resources - Expenses</field>
        </record>
        
        <record model="res.roles" id="HR_INV">
            <field name="name">Human Resources - Expenses invoice</field>
        </record>
        
        <!-- Workflow definition -->
        
        <record model="workflow" id="wkf_expenses">
            <field name="name">hr.wkf.expenses</field>
            <field name="osv">hr.expense.expense</field>
            <field name="on_create">True</field>
        </record>
        
        <record model="workflow.activity" id="act_draft">
            <field name="wkf_id" ref="wkf_expenses" />
            <field name="name">draft</field>
            <field name="flow_start">True</field>
            <field name="kind">function</field>
            <field name="action">write({'state': 'draft'})</field>
        </record>
        <record model="workflow.activity" id="act_confirm">
            <field name="wkf_id" ref="wkf_expenses" />
            <field name="name">confirm</field>
            <field name="kind">function</field>
            <field name="action">expense_confirm()</field>
        </record>
        <record model="workflow.activity" id="act_accepted">
            <field name="wkf_id" ref="wkf_expenses" />
            <field name="name">accepted</field>
            <field name="kind">function</field>
            <field name="action">expense_accept()</field>
        </record>
        <record model="workflow.activity" id="act_paid">
            <field name="wkf_id" ref="wkf_expenses" />
            <field name="name">paid</field>
            <field name="kind">function</field>
            <field name="action">expense_paid()</field>
            <field name="flow_stop">True</field>
        </record>
        <record model="workflow.activity" id="act_refused">
            <field name="wkf_id" ref="wkf_expenses" />
            <field name="name">refused</field>
            <field name="kind">function</field>
            <field name="action">expense_canceled()</field>
            <field name="flow_stop">True</field>
        </record>
        <record model="workflow.activity" id="act_invoice">
            <field name="wkf_id" ref="wkf_expenses"/>
            <field name="name">invoice</field>
            <field name="kind">subflow</field>
            <field name="subflow_id" ref="account.wkf"/>
            <field name="action">action_invoice_create()</field>
        </record>
        
        <record model="workflow.transition" id="t1">
            <field name="act_from" ref="act_draft" />
            <field name="act_to" ref="act_confirm" />
            <field name="signal">confirm</field>
        </record>
        <record model="workflow.transition" id="t2">
            <field name="act_from" ref="act_confirm" />
            <field name="act_to" ref="act_accepted" />
            <field name="signal">validate</field>
            <field name="role_id" ref="HR"/>
        </record>
        <!--record model="workflow.transition" id="t3">
			<field name="act_from" ref="act_accepted" />
			<field name="act_to" ref="act_paid" />
			<field name="signal">paid</field>
			<field name="role_id" ref="HR"/>
		</record-->
        <record model="workflow.transition" id="t4">
            <field name="act_from" ref="act_confirm" />
            <field name="act_to" ref="act_refused" />
            <field name="signal">refuse</field>
            <field name="role_id" ref="HR"/>
        </record>
        <record model="workflow.transition" id="t5">
            <field name="act_from" ref="act_draft" />
            <field name="act_to" ref="act_refused" />
            <field name="signal">refuse</field>
        </record>
        
        <record model="workflow.transition" id="t6">
            <field name="act_from" ref="act_accepted" />
            <field name="act_to" ref="act_refused" />
            <field name="signal">refuse</field>
            <field name="role_id" ref="HR"/>
        </record>
        <record model="workflow.transition" id="t7">
            <field name="act_from" ref="act_confirm" />
            <field name="act_to" ref="act_draft" />
            <field name="signal">draft</field>
            <field name="role_id" ref="HR"/>
        </record>
        <record model="workflow.transition" id="t8">
            <field name="act_from" ref="act_accepted" />
            <field name="act_to" ref="act_invoice" />
            <field name="signal">invoice</field>
            <field name="role_id" ref="HR_INV"/>
        </record>
        <record model="workflow.transition" id="t9">
            <field name="act_from" ref="act_invoice" />
            <field name="act_to" ref="act_paid" />
            <field name="signal">subflow.paid</field>
        </record>
        <record model="workflow.transition" id="t10">
            <field name="act_from" ref="act_invoice" />
            <field name="act_to" ref="act_refused" />
            <field name="signal">subflow.cancel</field>
        </record>
        
    </data>
</terp>