Rooms are central to how Matrix operates, and have strict rules for what is allowed to be contained within them. Rooms can also have various algorithms that handle different tasks, such as what to do when two or more events collide in the underlying DAG. To allow rooms to be improved upon through new algorithms or rules, “room versions” are employed to manage a set of expectations for each room. New room versions are assigned as needed.| Matrix Specification
The client-server API allows clients to send messages, control rooms and synchronise conversation history. It is designed to support both lightweight clients which store no state and lazy-load data from the server as required - as well as heavyweight clients which maintain a full local persistent copy of server state. API Standards The mandatory baseline for client-server communication in Matrix is exchanging JSON objects over HTTP APIs. More efficient transports may be specified in future as...| Matrix Specification
Unpadded Base64 Unpadded Base64 refers to ‘standard’ Base64 encoding as defined in RFC 4648, without “=” padding. Specifically, where RFC 4648 requires that encoded data be padded to a multiple of four characters using = characters, unpadded Base64 omits this padding. For reference, RFC 4648 uses the following alphabet for Base 64: Value Encoding Value Encoding Value Encoding Value Encoding 0 A 17 R 34 i 51 z 1 B 18 S 35 j 52 0 2 C 19 T 36 k 53 1 3 D 20 U 37 l 54 2 4 E 21 V 38 m 55 3 ...| Matrix Specification
Uniform Resource Identifier (URI) Schemes| www.iana.org
A Uniform Resource Identifier (URI) is a compact sequence of characters that identifies an abstract or physical resource. This specification defines the generic URI syntax and a process for resolving URI references that might be in relative form, along with guidelines and security considerations for the use of URIs on the Internet. The URI syntax defines a grammar that is a superset of all valid URIs, allowing an implementation to parse the common components of a URI reference without knowing...| IETF Datatracker
A modified Base 58 binary-to-text encoding known as Base58Check is used for encoding Bitcoin addresses.| en.bitcoin.it