{
  "id": "type-p06",
  "revision": "fd7b01e1230a0ac509be52f513103956a0e20452decf0cf59b3a0b266de8f22b",
  "regions": [
    {
      "id": "server",
      "label": "Server",
      "parent": null
    },
    {
      "id": "common-logic",
      "label": "Common logic",
      "parent": null
    },
    {
      "id": "device-storage",
      "label": "Device storage",
      "parent": null
    },
    {
      "id": "mobile",
      "label": "Mobile",
      "parent": null
    }
  ],
  "nodes": [
    {
      "id": "source",
      "label": "Attachment chunk source",
      "kind": "N26",
      "region": "server",
      "ports": [
        {
          "id": "chunks",
          "profile": "P06",
          "contract": "CreditBoundAttachmentChunksV1",
          "polarity": "Offer"
        },
        {
          "id": "credits",
          "profile": "P06",
          "contract": "AttachmentStreamCreditsV1",
          "polarity": "Require"
        }
      ]
    },
    {
      "id": "verify",
      "label": "Chunk verifier",
      "kind": "N01",
      "region": "common-logic",
      "ports": [
        {
          "id": "chunks",
          "profile": "P06",
          "contract": "CreditBoundAttachmentChunksV1",
          "polarity": "Require"
        },
        {
          "id": "verified",
          "profile": "P06",
          "contract": "VerifiedAttachmentChunksV1",
          "polarity": "Offer"
        }
      ]
    },
    {
      "id": "writer",
      "label": "Bounded file writer",
      "kind": "N02",
      "region": "device-storage",
      "ports": [
        {
          "id": "chunks",
          "profile": "P06",
          "contract": "VerifiedAttachmentChunksV1",
          "polarity": "Require"
        },
        {
          "id": "capacity",
          "profile": "P06",
          "contract": "AttachmentStreamCreditsV1",
          "polarity": "Offer"
        }
      ]
    },
    {
      "id": "control",
      "label": "Download credit controller",
      "kind": "N05",
      "region": "common-logic",
      "ports": [
        {
          "id": "capacity",
          "profile": "P06",
          "contract": "AttachmentStreamCreditsV1",
          "polarity": "Require"
        },
        {
          "id": "credits",
          "profile": "P06",
          "contract": "AttachmentStreamCreditsV1",
          "polarity": "Offer"
        },
        {
          "id": "progress",
          "profile": "P08",
          "contract": "DownloadProgressV1",
          "polarity": "Offer"
        },
        {
          "id": "cancel",
          "profile": "P14",
          "contract": "CancelDownloadV1",
          "polarity": "Require"
        }
      ]
    },
    {
      "id": "ui",
      "label": "Progress Surface",
      "kind": "N11",
      "region": "mobile",
      "ports": [
        {
          "id": "progress",
          "profile": "P08",
          "contract": "DownloadProgressV1",
          "polarity": "Require"
        },
        {
          "id": "cancel",
          "profile": "P14",
          "contract": "CancelDownloadV1",
          "polarity": "Offer"
        }
      ]
    }
  ],
  "relations": [
    {
      "id": "chunks",
      "kind": "H02",
      "incidences": [
        {
          "node": "source",
          "port": "chunks",
          "role": "source",
          "ordinal": 0
        },
        {
          "node": "verify",
          "port": "chunks",
          "role": "target",
          "ordinal": 0
        }
      ]
    },
    {
      "id": "verified",
      "kind": "H02",
      "incidences": [
        {
          "node": "verify",
          "port": "verified",
          "role": "source",
          "ordinal": 0
        },
        {
          "node": "writer",
          "port": "chunks",
          "role": "target",
          "ordinal": 0
        }
      ]
    },
    {
      "id": "capacity",
      "kind": "H02",
      "incidences": [
        {
          "node": "writer",
          "port": "capacity",
          "role": "source",
          "ordinal": 0
        },
        {
          "node": "control",
          "port": "capacity",
          "role": "target",
          "ordinal": 0
        }
      ]
    },
    {
      "id": "grant",
      "kind": "H02",
      "incidences": [
        {
          "node": "control",
          "port": "credits",
          "role": "source",
          "ordinal": 0
        },
        {
          "node": "source",
          "port": "credits",
          "role": "target",
          "ordinal": 0
        }
      ]
    },
    {
      "id": "progress",
      "kind": "H02",
      "incidences": [
        {
          "node": "control",
          "port": "progress",
          "role": "source",
          "ordinal": 0
        },
        {
          "node": "ui",
          "port": "progress",
          "role": "target",
          "ordinal": 0
        }
      ]
    },
    {
      "id": "cancel",
      "kind": "H03",
      "incidences": [
        {
          "node": "ui",
          "port": "cancel",
          "role": "source",
          "ordinal": 0
        },
        {
          "node": "control",
          "port": "cancel",
          "role": "target",
          "ordinal": 0
        }
      ]
    }
  ]
}