syntax = "proto2";

package dephy.message;

enum W3bstreamPayloadEncoding {
    WPE_UTF8 = 0;
    WPE_UTF8_JSON = 1;
    WPE_HEX = 2;
    WPE_BASE64 = 3;
}

message W3bstreamOptions {
    required string topic = 1;
    required string token = 2;
    required W3bstreamPayloadEncoding encoding = 3; // How the payload being sent to W3bstream
}

message RawMessage {
    required uint64 timestamp = 1;
    required bytes from_address = 2; // ethereum address in bytes form
    required bytes to_address = 3; // ethereum address in bytes form
    required bool encrypted = 4; // Whether the payload is encrypted, the key should be negotiated by secp256k1.ecdh
    required bytes payload = 5;
    optional bytes iv = 6; // 16 bytes length IV for AES-256-CBC
    required int32 kind = 7;
    optional W3bstreamOptions w3b = 8;
}

message SignedMessage {
    required bytes raw = 1;
    required bytes hash = 2;
    required uint64 nonce = 3; // Must greater than previous message
    required bytes signature = 4;
    optional bytes last_edge_addr = 5;
}