{
  "$schema": "../../schema/test-vector.schema.json",
  "name": "Path - Boundary Conditions",
  "spec_ref": "src/03-path.md",
  "protocol_version": 0,
  "description": "Tests boundary conditions for path encoding including maximum valid values and values just below overflow thresholds.",
  "vectors": [
    {
      "id": "pb-001",
      "description": "hash_size=2, count=31 (62 bytes, 2 below max)",
      "type": "encode_decode",
      "structured": {
        "header": {
          "version": 0,
          "payload_type": "ack",
          "route_type": "flood"
        },
        "path": {
          "hash_size": 2,
          "hash_count": 31,
          "hashes": [
            "0001",
            "0203",
            "0405",
            "0607",
            "0809",
            "0A0B",
            "0C0D",
            "0E0F",
            "1011",
            "1213",
            "1415",
            "1617",
            "1819",
            "1A1B",
            "1C1D",
            "1E1F",
            "2021",
            "2223",
            "2425",
            "2627",
            "2829",
            "2A2B",
            "2C2D",
            "2E2F",
            "3031",
            "3233",
            "3435",
            "3637",
            "3839",
            "3A3B",
            "3C3D"
          ]
        },
        "payload": {
          "ack_crc": "00000001"
        }
      },
      "binary": "0D 5F 000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F202122232425262728292A2B2C2D2E2F303132333435363738393A3B3C3D 01000000",
      "notes": "path_len=0x5F: hash_size=2, count=31. Path: 62 bytes. Just below max."
    },
    {
      "id": "pb-002",
      "description": "hash_size=3, count=20 (60 bytes, 3 below max for this hash_size)",
      "type": "encode_decode",
      "structured": {
        "header": {
          "version": 0,
          "payload_type": "ack",
          "route_type": "flood"
        },
        "path": {
          "hash_size": 3,
          "hash_count": 20,
          "hashes": [
            "000102",
            "030405",
            "060708",
            "090A0B",
            "0C0D0E",
            "0F1011",
            "121314",
            "151617",
            "18191A",
            "1B1C1D",
            "1E1F20",
            "212223",
            "242526",
            "272829",
            "2A2B2C",
            "2D2E2F",
            "303132",
            "333435",
            "363738",
            "393A3B"
          ]
        },
        "payload": {
          "ack_crc": "00000001"
        }
      },
      "binary": "0D 94 000102030405060708090A0B0C0D0E0F101112131415161718191A1B1C1D1E1F202122232425262728292A2B2C2D2E2F30313233343536373839 3A3B 01000000",
      "notes": "path_len=0x94: hash_size=3, count=20. Path: 60 bytes."
    },
    {
      "id": "pb-003",
      "description": "Single-byte path: hash_size=1, count=1",
      "type": "encode_decode",
      "structured": {
        "header": {
          "version": 0,
          "payload_type": "ack",
          "route_type": "flood"
        },
        "path": {
          "hash_size": 1,
          "hash_count": 1,
          "hashes": [
            "00"
          ]
        },
        "payload": {
          "ack_crc": "00000001"
        }
      },
      "binary": "0D 01 00 01000000",
      "notes": "Minimal non-empty path. Hash value 0x00 is valid."
    },
    {
      "id": "pb-004",
      "description": "Path with all-FF hashes",
      "type": "encode_decode",
      "structured": {
        "header": {
          "version": 0,
          "payload_type": "ack",
          "route_type": "flood"
        },
        "path": {
          "hash_size": 1,
          "hash_count": 3,
          "hashes": [
            "FF",
            "FF",
            "FF"
          ]
        },
        "payload": {
          "ack_crc": "00000001"
        }
      },
      "binary": "0D 03 FFFFFF 01000000",
      "notes": "All hashes are 0xFF. Valid encoding."
    }
  ]
}