paths:
  /liens:
    post:
      summary: Place a lien
      description: Place a lien (encumbrance) on an account
      operationId: placeLien
      tags:
        - Liens
      security:
        - oauth2:
            - liens:write
      x-roles:
        - DEBT_AUTHORITY
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '../components/schemas.yaml#/components/schemas/PlaceLienRequest'
      responses:
        '201':
          description: Lien placed successfully
          content:
            application/json:
              schema:
                $ref: '../components/schemas.yaml#/components/schemas/Lien'
        '400':
          $ref: '../openapi.yaml#/components/responses/BadRequest'
        '403':
          $ref: '../openapi.yaml#/components/responses/Forbidden'
    
    get:
      summary: List liens
      description: List liens with optional filtering
      operationId: listLiens
      tags:
        - Liens
      security:
        - oauth2:
            - liens:read
      parameters:
        - name: debtor
          in: query
          schema:
            type: string
            pattern: '^(0x[a-fA-F0-9]{40}|0x[a-fA-F0-9]{64})$'
          description: Filter by debtor address or account reference
        - name: active
          in: query
          schema:
            type: boolean
          description: Filter by active status
        - name: limit
          in: query
          schema:
            type: integer
            minimum: 1
            maximum: 100
            default: 20
        - name: offset
          in: query
          schema:
            type: integer
            minimum: 0
            default: 0
      responses:
        '200':
          description: List of liens
          content:
            application/json:
              schema:
                type: object
                properties:
                  items:
                    type: array
                    items:
                      $ref: '../components/schemas.yaml#/components/schemas/Lien'
                  total:
                    type: integer
                  limit:
                    type: integer
                  offset:
                    type: integer

  /liens/{lienId}:
    get:
      summary: Get lien
      description: Get lien details by ID
      operationId: getLien
      tags:
        - Liens
      security:
        - oauth2:
            - liens:read
      parameters:
        - $ref: '../components/parameters.yaml#/components/parameters/LienId'
      responses:
        '200':
          description: Lien details
          content:
            application/json:
              schema:
                $ref: '../components/schemas.yaml#/components/schemas/Lien'
        '404':
          $ref: '../openapi.yaml#/components/responses/NotFound'
    
    patch:
      summary: Reduce lien
      description: Reduce lien amount
      operationId: reduceLien
      tags:
        - Liens
      security:
        - oauth2:
            - liens:write
      x-roles:
        - DEBT_AUTHORITY
      parameters:
        - $ref: '../components/parameters.yaml#/components/parameters/LienId'
      requestBody:
        required: true
        content:
          application/json:
            schema:
              $ref: '../components/schemas.yaml#/components/schemas/ReduceLienRequest'
      responses:
        '200':
          description: Lien reduced
          content:
            application/json:
              schema:
                $ref: '../components/schemas.yaml#/components/schemas/Lien'
    
    delete:
      summary: Release lien
      description: Release (remove) a lien
      operationId: releaseLien
      tags:
        - Liens
      security:
        - oauth2:
            - liens:write
      x-roles:
        - DEBT_AUTHORITY
      parameters:
        - $ref: '../components/parameters.yaml#/components/parameters/LienId'
      responses:
        '200':
          description: Lien released
          content:
            application/json:
              schema:
                type: object
                properties:
                  lienId:
                    type: string
                  released:
                    type: boolean

  /accounts/{accountRefId}/liens:
    get:
      summary: List liens for account
      description: Get all liens for a specific account
      operationId: getAccountLiens
      tags:
        - Liens
      security:
        - oauth2:
            - liens:read
      parameters:
        - $ref: '../components/parameters.yaml#/components/parameters/AccountRefId'
        - name: active
          in: query
          schema:
            type: boolean
          description: Filter by active status
      responses:
        '200':
          description: List of liens
          content:
            application/json:
              schema:
                type: object
                properties:
                  accountRefId:
                    type: string
                  liens:
                    type: array
                    items:
                      $ref: '../components/schemas.yaml#/components/schemas/Lien'
                  activeEncumbrance:
                    type: string
                    description: Total active encumbrance amount

  /accounts/{accountRefId}/encumbrance:
    get:
      summary: Get encumbrance summary
      description: Get active encumbrance and free balance for an account by token
      operationId: getEncumbrance
      tags:
        - Liens
      security:
        - oauth2:
            - liens:read
      parameters:
        - $ref: '../components/parameters.yaml#/components/parameters/AccountRefId'
        - name: token
          in: query
          schema:
            type: string
            pattern: '^0x[a-fA-F0-9]{40}$'
          description: Token address (optional, returns for all tokens if omitted)
      responses:
        '200':
          description: Encumbrance summary
          content:
            application/json:
              schema:
                type: object
                properties:
                  accountRefId:
                    type: string
                  encumbrances:
                    type: array
                    items:
                      type: object
                      properties:
                        token:
                          type: string
                        tokenCode:
                          type: string
                        balance:
                          type: string
                        activeEncumbrance:
                          type: string
                        freeBalance:
                          type: string