{
  "$schema": "../../schema/test-vector.schema.json",
  "name": "ACK Payload - Boundary Values",
  "spec_ref": "src/04-payload-ack.md",
  "protocol_version": 0,
  "description": "ACK CRC boundary value tests including all-zeros, all-ones, and single-bit patterns.",
  "vectors": [
    {
      "id": "ack-bnd-001",
      "description": "ACK CRC all zeros",
      "type": "encode_decode",
      "structured": {
        "header": {
          "version": 0,
          "payload_type": "ack",
          "route_type": "flood"
        },
        "path": {
          "hash_size": 1,
          "hash_count": 0,
          "hashes": []
        },
        "payload": {
          "ack_crc": "00000000"
        }
      },
      "binary": "0D 00 00000000"
    },
    {
      "id": "ack-bnd-002",
      "description": "ACK CRC all ones",
      "type": "encode_decode",
      "structured": {
        "header": {
          "version": 0,
          "payload_type": "ack",
          "route_type": "flood"
        },
        "path": {
          "hash_size": 1,
          "hash_count": 0,
          "hashes": []
        },
        "payload": {
          "ack_crc": "FFFFFFFF"
        }
      },
      "binary": "0D 00 FFFFFFFF"
    },
    {
      "id": "ack-bnd-003",
      "description": "ACK CRC 0x80000000 (high bit set)",
      "type": "encode_decode",
      "structured": {
        "header": {
          "version": 0,
          "payload_type": "ack",
          "route_type": "flood"
        },
        "path": {
          "hash_size": 1,
          "hash_count": 0,
          "hashes": []
        },
        "payload": {
          "ack_crc": "80000000"
        }
      },
      "binary": "0D 00 00000080"
    },
    {
      "id": "ack-bnd-004",
      "description": "ACK CRC 0x00000080 (byte boundary)",
      "type": "encode_decode",
      "structured": {
        "header": {
          "version": 0,
          "payload_type": "ack",
          "route_type": "flood"
        },
        "path": {
          "hash_size": 1,
          "hash_count": 0,
          "hashes": []
        },
        "payload": {
          "ack_crc": "00000080"
        }
      },
      "binary": "0D 00 80000000"
    },
    {
      "id": "ack-bnd-005",
      "description": "ACK CRC 0x01000000",
      "type": "encode_decode",
      "structured": {
        "header": {
          "version": 0,
          "payload_type": "ack",
          "route_type": "flood"
        },
        "path": {
          "hash_size": 1,
          "hash_count": 0,
          "hashes": []
        },
        "payload": {
          "ack_crc": "01000000"
        }
      },
      "binary": "0D 00 00000001",
      "notes": "Tests that 0x01000000 LE = 00 00 00 01, not confused with 0x00000001."
    }
  ]
}