{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://meta-universe.org/schemas/2.0/mufp-envelope.schema.json",
  "title": "MUFP Envelope",
  "description": "Every MUFP message is an instance of this envelope (see 03-federation/MUFP-Messages.md).",
  "type": "object",
  "required": ["mufp", "messageId", "type", "from", "to", "sentAt", "body"],
  "additionalProperties": false,
  "properties": {
    "mufp": {
      "type": "object",
      "required": ["version"],
      "additionalProperties": false,
      "properties": { "version": { "const": "1.0" } }
    },
    "messageId": { "$ref": "common.schema.json#/$defs/identifier" },
    "inReplyTo": { "$ref": "common.schema.json#/$defs/identifier" },
    "type": {
      "type": "string",
      "enum": [
        "Hello", "HelloAck",
        "CapabilityOffer", "CapabilityAccept",
        "TrustRequest", "TrustResponse",
        "ContractProposal", "ContractAccept", "ContractReject",
        "SchemaRequest", "SchemaResponse",
        "ProjectionRequest", "ProjectionResponse",
        "SyncEvent", "SyncAck",
        "IdentityBindingProposal", "IdentityBindingAccept",
        "Suspend", "Resume", "Terminate",
        "Revoke", "Error"
      ]
    },
    "from": { "$ref": "common.schema.json#/$defs/identifier" },
    "to": { "$ref": "common.schema.json#/$defs/identifier" },
    "federationId": { "$ref": "common.schema.json#/$defs/identifier" },
    "sentAt": { "type": "string", "format": "date-time" },
    "body": { "type": "object" },
    "signature": {
      "type": "object",
      "required": ["alg", "value"],
      "additionalProperties": false,
      "properties": {
        "alg": { "type": "string", "description": "Signature algorithm, e.g. ed25519. Defined by the Security-Model." },
        "value": { "type": "string", "description": "Detached signature over the canonical envelope (signature removed)." }
      }
    }
  },
  "allOf": [
    {
      "if": { "properties": { "type": { "const": "Error" } } },
      "then": {
        "properties": {
          "body": {
            "type": "object",
            "required": ["code", "message", "retriable"],
            "properties": {
              "code": {
                "type": "string",
                "enum": [
                  "MUFP-E-VERSION-UNSUPPORTED", "MUFP-E-CAPABILITY-MISMATCH",
                  "MUFP-E-TRUST-DENIED", "MUFP-E-CONTRACT-REJECTED",
                  "MUFP-E-SCHEMA-UNAVAILABLE", "MUFP-E-DISCLOSURE-DENIED",
                  "MUFP-E-FINGERPRINT-MISMATCH", "MUFP-E-IDENTITY-UNRESOLVED",
                  "MUFP-E-REVOKED", "MUFP-E-STATE",
                  "MUFP-E-RATE-LIMITED", "MUFP-E-INTERNAL"
                ]
              },
              "requirement": { "type": "string" },
              "message": { "type": "string" },
              "retriable": { "type": "boolean" }
            }
          }
        }
      }
    },
    {
      "if": { "properties": { "type": { "const": "Hello" } } },
      "then": {
        "properties": {
          "body": {
            "type": "object",
            "required": ["supportedVersions", "purpose"],
            "properties": {
              "supportedVersions": {
                "type": "object",
                "properties": {
                  "muc": { "$ref": "common.schema.json#/$defs/semverRange" },
                  "mmas": { "$ref": "common.schema.json#/$defs/semverRange" },
                  "mufp": { "$ref": "common.schema.json#/$defs/semverRange" }
                }
              },
              "purpose": { "type": "string", "minLength": 1 }
            }
          }
        }
      }
    },
    {
      "if": { "properties": { "type": { "const": "ProjectionRequest" } } },
      "then": {
        "properties": {
          "body": {
            "type": "object",
            "required": ["subject", "purpose", "contractId"],
            "properties": {
              "subject": { "$ref": "common.schema.json#/$defs/identifier" },
              "purpose": { "type": "string", "minLength": 1 },
              "contractId": { "$ref": "common.schema.json#/$defs/identifier" },
              "profile": { "$ref": "common.schema.json#/$defs/csn" }
            }
          }
        }
      }
    },
    {
      "if": { "properties": { "type": { "const": "TrustResponse" } } },
      "then": {
        "properties": {
          "body": {
            "type": "object",
            "required": ["decision"],
            "properties": {
              "decision": { "type": "string", "enum": ["accept", "deny"] },
              "trustVector": {
                "type": "object",
                "description": "Per-dimension trust (see Trust-Model).",
                "properties": {
                  "identity": { "type": "number" },
                  "semantic": { "type": "number" },
                  "governance": { "type": "number" },
                  "contract": { "type": "number" },
                  "operational": { "type": "number" },
                  "historical": { "type": "number" }
                }
              },
              "reason": { "type": "string" }
            }
          }
        }
      }
    }
  ]
}