diff --git a/Cargo.lock b/Cargo.lock
index fdecfa4..cf34603 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -31,7 +31,7 @@ checksum = "9e8b47f52ea9bae42228d07ec09eb676433d7c4ed1ebdf0f1d1c29ed446f1ab8"
 dependencies = [
  "cfg-if",
  "cipher",
- "cpufeatures 0.2.1",
+ "cpufeatures",
  "ctr",
  "opaque-debug",
 ]
@@ -61,6 +61,21 @@ dependencies = [
  "version_check",
 ]
 
+[[package]]
+name = "ansi_term"
+version = "0.12.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d52a9bb7ec0cf484c551830a7ce27bd20d67eac647e1befb56b0be4ee39a55d2"
+dependencies = [
+ "winapi",
+]
+
+[[package]]
+name = "anyhow"
+version = "1.0.43"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "28ae2b3dec75a406790005a200b1bd89785afc02517a00ca99ecfe093ee9e6cf"
+
 [[package]]
 name = "assign"
 version = "1.1.1"
@@ -87,6 +102,17 @@ dependencies = [
  "autocfg",
 ]
 
+[[package]]
+name = "atty"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
+dependencies = [
+ "hermit-abi",
+ "libc",
+ "winapi",
+]
+
 [[package]]
 name = "autocfg"
 version = "1.0.1"
@@ -172,21 +198,21 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "chacha20"
-version = "0.7.1"
+version = "0.8.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fee7ad89dc1128635074c268ee661f90c3f7e83d9fd12910608c36b47d6c3412"
+checksum = "01b72a433d0cf2aef113ba70f62634c56fddb0f244e6377185c56a7cadbd8f91"
 dependencies = [
  "cfg-if",
  "cipher",
- "cpufeatures 0.1.5",
+ "cpufeatures",
  "zeroize",
 ]
 
 [[package]]
 name = "chacha20poly1305"
-version = "0.8.0"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1580317203210c517b6d44794abfbe600698276db18127e37ad3e69bf5e848e5"
+checksum = "3b84ed6d1d5f7aa9bdde921a5090e0ca4d934d250ea3b402a5fab3a994e28a2a"
 dependencies = [
  "aead",
  "chacha20",
@@ -201,6 +227,18 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "17cc5e6b5ab06331c33589842070416baa137e8b0eb912b008cfd4a78ada7919"
 
+[[package]]
+name = "chrono"
+version = "0.4.19"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "670ad68c9088c2a963aaa298cb369688cf3f9465ce5e2d4ca10e6e0098a1ce73"
+dependencies = [
+ "libc",
+ "num-integer",
+ "num-traits",
+ "winapi",
+]
+
 [[package]]
 name = "cipher"
 version = "0.3.0"
@@ -210,6 +248,37 @@ dependencies = [
  "generic-array",
 ]
 
+[[package]]
+name = "clap"
+version = "3.0.0-beta.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fcd70aa5597dbc42f7217a543f9ef2768b2ef823ba29036072d30e1d88e98406"
+dependencies = [
+ "atty",
+ "bitflags",
+ "clap_derive",
+ "indexmap",
+ "lazy_static",
+ "os_str_bytes",
+ "strsim",
+ "termcolor",
+ "textwrap",
+ "vec_map",
+]
+
+[[package]]
+name = "clap_derive"
+version = "3.0.0-beta.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b5bb0d655624a0b8770d1c178fb8ffcb1f91cc722cb08f451e3dc72465421ac"
+dependencies = [
+ "heck",
+ "proc-macro-error",
+ "proc-macro2 1.0.29",
+ "quote 1.0.9",
+ "syn 1.0.76",
+]
+
 [[package]]
 name = "cmake"
 version = "0.1.45"
@@ -253,15 +322,6 @@ version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ea221b5284a47e40033bf9b66f35f984ec0ea2931eb03505246cd27a963f981b"
 
-[[package]]
-name = "cpufeatures"
-version = "0.1.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "66c99696f6c9dd7f35d486b9d04d7e6e202aa3e8c40d553f2fdf5e7e0c6a71ef"
-dependencies = [
- "libc",
-]
-
 [[package]]
 name = "cpufeatures"
 version = "0.2.1"
@@ -400,6 +460,12 @@ version = "1.0.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "212d0f5754cb6769937f4501cc0e67f4f4483c8d2c3e1e922ee9edbe4ab4c7c0"
 
+[[package]]
+name = "dtoa"
+version = "0.4.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56899898ce76aaf4a0f24d914c97ea6ed976d42fec6ad33fcbb0a1103e07b2b0"
+
 [[package]]
 name = "ed25519"
 version = "1.2.0"
@@ -438,6 +504,12 @@ dependencies = [
  "cfg-if",
 ]
 
+[[package]]
+name = "event-listener"
+version = "2.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f7531096570974c3a9dcf9e4b8e1cede1ec26cf5046219fb3b9d897503b9be59"
+
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -724,6 +796,15 @@ dependencies = [
  "ahash",
 ]
 
+[[package]]
+name = "heck"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6d621efb26863f0e9924c6ac577e8275e5e6b77455db64ffa6c65c904e9e132c"
+dependencies = [
+ "unicode-segmentation",
+]
+
 [[package]]
 name = "hermit-abi"
 version = "0.1.19"
@@ -937,6 +1018,12 @@ version = "0.2.101"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3cb00336871be5ed2c8ed44b60ae9959dc5b9f08539422ed43f09e34ecaeba21"
 
+[[package]]
+name = "linked-hash-map"
+version = "0.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7fb9b38af92608140b86b693604b9ffcc5824240a484d1ecd4795bacb2fe88f3"
+
 [[package]]
 name = "lock_api"
 version = "0.4.5"
@@ -970,6 +1057,15 @@ version = "1.0.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3e2e65a1a2e43cfcb47a895c4c8b10d1f4a61097f9f254f183aee60cad9c651d"
 
+[[package]]
+name = "matchers"
+version = "0.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f099785f7595cc4b4553a174ce30dd7589ef93391ff414dbb67f62392b9e0ce1"
+dependencies = [
+ "regex-automata",
+]
+
 [[package]]
 name = "matches"
 version = "0.1.9"
@@ -978,9 +1074,9 @@ checksum = "a3e378b66a060d48947b590737b30a1be76706c8dd7b8ba0f2fe3989c68a853f"
 
 [[package]]
 name = "matrix-qrcode"
-version = "0.1.0"
+version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "292c022b5b3d2f6fe39095497b27f4ec5cbcc6e55d0b20c0c01b8bde07f3f419"
+checksum = "4231739aa2ff90c6c55b07d7179c52b496622a86fc2f7e0431336d109ba7838d"
 dependencies = [
  "base64",
  "byteorder",
@@ -993,13 +1089,14 @@ dependencies = [
 
 [[package]]
 name = "matrix-sdk"
-version = "0.3.0"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b1a9dcccddd5d1e7b13304169021404015fd40a95f56bd895319e9447f7784e6"
+checksum = "1119aaca5e48e4794ad19d981a6d69205d16b60a15c55cec46d6cb1a0725d579"
 dependencies = [
  "backoff",
  "bytes",
  "dashmap",
+ "event-listener",
  "futures",
  "futures-timer",
  "http",
@@ -1008,6 +1105,7 @@ dependencies = [
  "mime",
  "reqwest",
  "ruma",
+ "serde",
  "serde_json",
  "thiserror",
  "tokio",
@@ -1019,9 +1117,9 @@ dependencies = [
 
 [[package]]
 name = "matrix-sdk-base"
-version = "0.3.0"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "96e360288b4acb062e4cb3e2952d49b2a93e256438ec749bfffdef701bd0abd0"
+checksum = "c9907a9d8ae3caf2c18ff1334e712947caab891ccbe167dea7d1790ab1047ab3"
 dependencies = [
  "chacha20poly1305",
  "dashmap",
@@ -1045,9 +1143,9 @@ dependencies = [
 
 [[package]]
 name = "matrix-sdk-common"
-version = "0.3.0"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5f595bd52c35ce962ecf52875c5b659f3845cb00b35dd205c7ae62e2b7bdad38"
+checksum = "d6a110018ac4df72a57f1c9d3976243c7c3ad7189f50aa7ca0032276c9c78519"
 dependencies = [
  "async-trait",
  "futures",
@@ -1062,9 +1160,9 @@ dependencies = [
 
 [[package]]
 name = "matrix-sdk-crypto"
-version = "0.3.0"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "207af21203f5d1787426dbb89c13dc791515448086f098c52ecb9bc591a5b621"
+checksum = "1683b93a94890337f75fdc3b8630a633c974089a9b5f874b4b5771cf82336bad"
 dependencies = [
  "aes",
  "aes-gcm",
@@ -1231,9 +1329,9 @@ dependencies = [
 
 [[package]]
 name = "olm-rs"
-version = "1.0.1"
+version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8962a1fc909accf520991dcda872888554ecf16320097e02d3bd9981844a24ae"
+checksum = "33a5773f317476f5687fc8200fc0120d97b075c30c133a5b15ca558252743720"
 dependencies = [
  "getrandom 0.2.3",
  "olm-sys",
@@ -1296,6 +1394,12 @@ dependencies = [
  "vcpkg",
 ]
 
+[[package]]
+name = "os_str_bytes"
+version = "3.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6acbef58a60fe69ab50510a55bc8cdd4d6cf2283d27ad338f54cb52747a9cf2d"
+
 [[package]]
 name = "parking_lot"
 version = "0.11.2"
@@ -1329,9 +1433,9 @@ checksum = "acbf547ad0c65e31259204bd90935776d1c693cec2f4ff7abb7a1bbbd40dfe58"
 
 [[package]]
 name = "pbkdf2"
-version = "0.8.0"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d95f5254224e617595d2cc3cc73ff0a5eaf2637519e25f03388154e9378b6ffa"
+checksum = "f05894bce6a1ba4be299d0c5f29563e08af2bc18bb7d48313113bed71e904739"
 dependencies = [
  "crypto-mac",
 ]
@@ -1409,7 +1513,7 @@ version = "0.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "048aeb476be11a4b6ca432ca569e375810de9294ae78f4774e78ea98a9246ede"
 dependencies = [
- "cpufeatures 0.2.1",
+ "cpufeatures",
  "opaque-debug",
  "universal-hash",
 ]
@@ -1421,7 +1525,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8419d2b623c7c0896ff2d5d96e2cb4ede590fed28fcc34934f4c33c036e620a1"
 dependencies = [
  "cfg-if",
- "cpufeatures 0.2.1",
+ "cpufeatures",
  "opaque-debug",
  "universal-hash",
 ]
@@ -1442,6 +1546,30 @@ dependencies = [
  "toml",
 ]
 
+[[package]]
+name = "proc-macro-error"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "da25490ff9892aab3fcf7c36f08cfb902dd3e71ca0f9f9517bea02a73a5ce38c"
+dependencies = [
+ "proc-macro-error-attr",
+ "proc-macro2 1.0.29",
+ "quote 1.0.9",
+ "syn 1.0.76",
+ "version_check",
+]
+
+[[package]]
+name = "proc-macro-error-attr"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a1be40180e52ecc98ad80b184934baf3d0d29f979574e439af5a55274b35f869"
+dependencies = [
+ "proc-macro2 1.0.29",
+ "quote 1.0.9",
+ "version_check",
+]
+
 [[package]]
 name = "proc-macro-hack"
 version = "0.5.19"
@@ -1476,7 +1604,15 @@ dependencies = [
 name = "prololo-reborn"
 version = "0.1.0"
 dependencies = [
+ "anyhow",
+ "clap",
  "matrix-sdk",
+ "serde",
+ "serde_yaml",
+ "tokio",
+ "tracing",
+ "tracing-subscriber",
+ "url",
 ]
 
 [[package]]
@@ -1622,6 +1758,30 @@ dependencies = [
  "bitflags",
 ]
 
+[[package]]
+name = "regex"
+version = "1.5.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d07a8629359eb56f1e2fb1652bb04212c072a87ba68546a04065d525673ac461"
+dependencies = [
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-automata"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6c230d73fb8d8c1b9c0b3135c5142a8acee3a0558fb8db5cf1cb65f8d7862132"
+dependencies = [
+ "regex-syntax",
+]
+
+[[package]]
+name = "regex-syntax"
+version = "0.6.25"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f497285884f3fcff424ffc933e56d7cbca511def0c9831a7f9b5f6153e3cc89b"
+
 [[package]]
 name = "remove_dir_all"
 version = "0.5.3"
@@ -1678,9 +1838,9 @@ dependencies = [
 
 [[package]]
 name = "ruma"
-version = "0.2.0"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a4acf77afac731e1fa133e6952d074af052f02d64909677a66619f52e758261"
+checksum = "668031e3108d6a2cfbe6eca271d8698f4593440e71a44afdadcf67ce3cb93c1f"
 dependencies = [
  "assign",
  "js_int",
@@ -1697,9 +1857,9 @@ dependencies = [
 
 [[package]]
 name = "ruma-api"
-version = "0.17.1"
+version = "0.18.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b6473753f244f057181f975224aeaf5b4e2003f43f2a6279bf0b95f4e0126335"
+checksum = "f5f1843792b6749ec1ece62595cf99ad30bf9589c96bb237515235e71da396ea"
 dependencies = [
  "bytes",
  "http",
@@ -1714,9 +1874,9 @@ dependencies = [
 
 [[package]]
 name = "ruma-api-macros"
-version = "0.17.1"
+version = "0.18.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "85286e2c65897079e7dcc120964cca47d5a3c23b7d1e9f730f533060919fedf7"
+checksum = "7b18abda5cca94178d08b622bca042e1cbb5eb7d4ebf3a2a81590a3bb3c57008"
 dependencies = [
  "proc-macro-crate",
  "proc-macro2 1.0.29",
@@ -1726,9 +1886,9 @@ dependencies = [
 
 [[package]]
 name = "ruma-client-api"
-version = "0.11.0"
+version = "0.12.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6b86eba1c6fce6dd5c7a17ed632515aa7d04bbe6fbaa74c1699fb72c9fcc2d3d"
+checksum = "9568a222c12cf6220e751484ab78feec28071f85965113a5bb802936a2920ff0"
 dependencies = [
  "assign",
  "bytes",
@@ -1747,9 +1907,9 @@ dependencies = [
 
 [[package]]
 name = "ruma-common"
-version = "0.5.4"
+version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "146a88f34b7a084d54eaf790aaf4c25f5d2366ca8f3d1f326985fa5d31d72595"
+checksum = "41d5b7605f58dc0d9cf1848cc7f1af2bae4e4bcd1d2b7a87bbb9864c8a785b91"
 dependencies = [
  "indexmap",
  "js_int",
@@ -1763,9 +1923,9 @@ dependencies = [
 
 [[package]]
 name = "ruma-events"
-version = "0.23.3"
+version = "0.24.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7da5f1472d60803e06744f83040a055948fd5bc1f4344d3e555ea378d0d6c96d"
+checksum = "87801e1207cfebdee02e7997ebf181a1c9837260b78c1b8ce96b896a2bcb3763"
 dependencies = [
  "indoc",
  "js_int",
@@ -1775,13 +1935,14 @@ dependencies = [
  "ruma-serde",
  "serde",
  "serde_json",
+ "thiserror",
 ]
 
 [[package]]
 name = "ruma-events-macros"
-version = "0.23.3"
+version = "0.24.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "85929d84b29c4ce034bd1742e13d7ca25d885831f0185b73f7f9a9094296e1c4"
+checksum = "5da4498845347de88adf1b7da4578e2ca7355ad4ce47b0976f6594bacf958660"
 dependencies = [
  "proc-macro-crate",
  "proc-macro2 1.0.29",
@@ -1791,9 +1952,9 @@ dependencies = [
 
 [[package]]
 name = "ruma-federation-api"
-version = "0.2.0"
+version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9d5206d4922c5dbd3b6faf2aaec9b5551fdf710ef73cc2145f13d0a5bb3945dc"
+checksum = "fa3d1db1a064ab26484df6ef5d96c384fc053022004f34d96c3b4939e13dc204"
 dependencies = [
  "js_int",
  "ruma-api",
@@ -1807,9 +1968,9 @@ dependencies = [
 
 [[package]]
 name = "ruma-identifiers"
-version = "0.19.4"
+version = "0.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9be9ce339ce206dd5eb5eb29b7ad1b964652d46345bc46f25d68105effc75f4b"
+checksum = "cb417d091e8dd5a633e4e5998231a156049d7fcc221045cfdc0642eb72067732"
 dependencies = [
  "paste",
  "ruma-identifiers-macros",
@@ -1821,9 +1982,9 @@ dependencies = [
 
 [[package]]
 name = "ruma-identifiers-macros"
-version = "0.19.4"
+version = "0.20.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e3c7bc7e132a84f8d03924cf63d3a37bd87ffee5c29fee69b9125d045c7e4020"
+checksum = "c708edad7f605638f26c951cbad7501fbf28ab01009e5ca65ea5a2db74a882b1"
 dependencies = [
  "quote 1.0.9",
  "ruma-identifiers-validation",
@@ -1832,15 +1993,15 @@ dependencies = [
 
 [[package]]
 name = "ruma-identifiers-validation"
-version = "0.4.0"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8edeb165c4dcb8c93d1b7396b32fd5f52c5d9c7e7898ab87d772f824fe642f7c"
+checksum = "42285e7fb5d5f2d5268e45bb683e36d5c6fd9fc1e11a4559ba3c3521f3bbb2cb"
 
 [[package]]
 name = "ruma-serde"
-version = "0.4.2"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cd9cf55470945ce15641f331d0230bbab328cdf9aa5c3ec8aa20977b60553f15"
+checksum = "8b2b22aae842e7ecda695e42b7b39d4558959d9d9a27acc2a16acf4f4f7f00c3"
 dependencies = [
  "bytes",
  "form_urlencoded",
@@ -1853,9 +2014,9 @@ dependencies = [
 
 [[package]]
 name = "ruma-serde-macros"
-version = "0.4.2"
+version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f6af6e7156da1a4b0bd4b13dbe8c5a725878595a7962345393b3f171c75bd7cc"
+checksum = "243e9bef188b08f94c79bc2f8fd1eb307a9e636b2b8e4571acf8c7be16381d28"
 dependencies = [
  "proc-macro-crate",
  "proc-macro2 1.0.29",
@@ -1865,9 +2026,9 @@ dependencies = [
 
 [[package]]
 name = "ruma-signatures"
-version = "0.8.0"
+version = "0.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5d83873429181c7747b42fce80d86be84d63fd178e83573472c93143643b7a67"
+checksum = "4a4f64027165b59500162d10d435b1253898bf3ad4f5002cb0d56913fe7f76d7"
 dependencies = [
  "base64",
  "ed25519-dalek",
@@ -1883,13 +2044,12 @@ dependencies = [
 
 [[package]]
 name = "ruma-state-res"
-version = "0.2.0"
+version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "50be7be79f1036dfdacda38e94f334e99f845db2e414887eedb757d065a05594"
+checksum = "518c1afbddfcc5ffac8818a5cf0902709e6eca11aca8f24f6479df6f0601f1ba"
 dependencies = [
  "itertools",
  "js_int",
- "maplit",
  "ruma-common",
  "ruma-events",
  "ruma-identifiers",
@@ -2024,6 +2184,18 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "serde_yaml"
+version = "0.8.21"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d8c608a35705a5d3cdc9fbe403147647ff34b921f8e833e49306df898f9b20af"
+dependencies = [
+ "dtoa",
+ "indexmap",
+ "serde",
+ "yaml-rust",
+]
+
 [[package]]
 name = "sha1"
 version = "0.6.0"
@@ -2038,11 +2210,29 @@ checksum = "9204c41a1597a8c5af23c82d1c921cb01ec0a4c59e07a9c7306062829a3903f3"
 dependencies = [
  "block-buffer",
  "cfg-if",
- "cpufeatures 0.2.1",
+ "cpufeatures",
  "digest",
  "opaque-debug",
 ]
 
+[[package]]
+name = "sharded-slab"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "740223c51853f3145fe7c90360d2d4232f2b62e3449489c207eccde818979982"
+dependencies = [
+ "lazy_static",
+]
+
+[[package]]
+name = "signal-hook-registry"
+version = "1.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e51e73328dc4ac0c7ccbda3a494dfa03df1de2f46018127f60c693f2648455b0"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "signature"
 version = "1.3.1"
@@ -2154,6 +2344,12 @@ version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "213701ba3370744dcd1a12960caa4843b3d68b4d1c0a5d575e0d65b2ee9d16c0"
 
+[[package]]
+name = "strsim"
+version = "0.10.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "73473c0e59e6d5812c5dfe2a064a6444949f089e20eec9a2e5506596494e4623"
+
 [[package]]
 name = "subtle"
 version = "2.4.1"
@@ -2208,6 +2404,24 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "termcolor"
+version = "1.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2dfed899f0eb03f32ee8c6a0aabdb8a7949659e3466561fc0adf54e26d88c5f4"
+dependencies = [
+ "winapi-util",
+]
+
+[[package]]
+name = "textwrap"
+version = "0.14.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0066c8d12af8b5acd21e00547c3797fde4e8677254a7ee429176ccebbe93dd80"
+dependencies = [
+ "unicode-width",
+]
+
 [[package]]
 name = "thiserror"
 version = "1.0.29"
@@ -2228,6 +2442,15 @@ dependencies = [
  "syn 1.0.76",
 ]
 
+[[package]]
+name = "thread_local"
+version = "1.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8018d24e04c95ac8790716a5987d0fec4f8b27249ffa0f7d33f1369bdfb88cbd"
+dependencies = [
+ "once_cell",
+]
+
 [[package]]
 name = "tiff"
 version = "0.6.1"
@@ -2303,10 +2526,26 @@ dependencies = [
  "libc",
  "memchr",
  "mio",
+ "num_cpus",
+ "once_cell",
+ "parking_lot",
  "pin-project-lite",
+ "signal-hook-registry",
+ "tokio-macros",
  "winapi",
 ]
 
+[[package]]
+name = "tokio-macros"
+version = "1.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "54473be61f4ebe4efd09cec9bd5d16fa51d70ea0192213d754d2d500457db110"
+dependencies = [
+ "proc-macro2 1.0.29",
+ "quote 1.0.9",
+ "syn 1.0.76",
+]
+
 [[package]]
 name = "tokio-native-tls"
 version = "0.3.0"
@@ -2388,6 +2627,49 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "tracing-log"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a6923477a48e41c1951f1999ef8bb5a3023eb723ceadafe78ffb65dc366761e3"
+dependencies = [
+ "lazy_static",
+ "log",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-serde"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fb65ea441fbb84f9f6748fd496cf7f63ec9af5bca94dd86456978d055e8eb28b"
+dependencies = [
+ "serde",
+ "tracing-core",
+]
+
+[[package]]
+name = "tracing-subscriber"
+version = "0.2.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b9cbe87a2fa7e35900ce5de20220a582a9483a7063811defce79d7cbd59d4cfe"
+dependencies = [
+ "ansi_term",
+ "chrono",
+ "lazy_static",
+ "matchers",
+ "regex",
+ "serde",
+ "serde_json",
+ "sharded-slab",
+ "smallvec",
+ "thread_local",
+ "tracing",
+ "tracing-core",
+ "tracing-log",
+ "tracing-serde",
+]
+
 [[package]]
 name = "try-lock"
 version = "0.2.3"
@@ -2415,6 +2697,18 @@ dependencies = [
  "tinyvec",
 ]
 
+[[package]]
+name = "unicode-segmentation"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8895849a949e7845e06bd6dc1aa51731a103c42707010a5b591c0038fb73385b"
+
+[[package]]
+name = "unicode-width"
+version = "0.1.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9337591893a19b88d8d87f2cec1e73fad5cdfd10e5a6f349f498ad6ea2ffb1e3"
+
 [[package]]
 name = "unicode-xid"
 version = "0.1.0"
@@ -2453,6 +2747,7 @@ dependencies = [
  "idna",
  "matches",
  "percent-encoding",
+ "serde",
 ]
 
 [[package]]
@@ -2471,6 +2766,12 @@ version = "0.2.15"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "accd4ea62f7bb7a82fe23066fb0957d48ef677f6eeb8215f372f52e48bb32426"
 
+[[package]]
+name = "vec_map"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f1bddf1187be692e79c5ffeab891132dfb0f236ed36a43c7ed39f1165ee20191"
+
 [[package]]
 name = "version_check"
 version = "0.9.3"
@@ -2605,6 +2906,15 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 
+[[package]]
+name = "winapi-util"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "70ec6ce85bb158151cae5e5c87f95a8e97d2c0c4b001223f33a334e3ce5de178"
+dependencies = [
+ "winapi",
+]
+
 [[package]]
 name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
@@ -2620,6 +2930,15 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "yaml-rust"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "56c1936c4cc7a1c9ab21a1ebb602eb942ba868cbd44a99cb7cdc5892335e1c85"
+dependencies = [
+ "linked-hash-map",
+]
+
 [[package]]
 name = "zeroize"
 version = "1.4.1"
diff --git a/Cargo.toml b/Cargo.toml
index a45df7c..21ebd5a 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,4 +6,12 @@ edition = "2018"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-matrix-sdk = "0.3.0"
+anyhow = "1.0"
+clap = "3.0.0-beta.4"
+matrix-sdk = "0.4.0"
+serde = "1.0"
+serde_yaml = "0.8"
+tokio = { version = "1.0", features = [ "full" ] }
+tracing-subscriber = "0.2"
+tracing = "0.1"
+url = { version = "2.2", features = [ "serde" ] }
diff --git a/src/bot/handlers/autojoin.rs b/src/bot/handlers/autojoin.rs
new file mode 100644
index 0000000..00bd326
--- /dev/null
+++ b/src/bot/handlers/autojoin.rs
@@ -0,0 +1,68 @@
+use std::time::Duration;
+
+use matrix_sdk::{
+    room::Room,
+    ruma::{
+        events::{room::member::MemberEventContent, StrippedStateEvent},
+        RoomId,
+    },
+    Client,
+};
+use tokio::time::sleep;
+use tracing::{debug, error, info, warn};
+
+pub async fn autojoin_authorized_rooms(
+    room_member: StrippedStateEvent<MemberEventContent>,
+    client: Client,
+    room: Room,
+    authorized_rooms: Vec<RoomId>,
+) {
+    if room_member.state_key != client.user_id().await.unwrap() {
+        return;
+    }
+
+    if let Room::Invited(room) = room {
+        let room_id = room.room_id();
+        let room_name = room
+            .display_name()
+            .await
+            .expect("couldn't get joined room name!");
+        info!(
+            "Received invitation for room `{}`: `{}`",
+            room_id, room_name
+        );
+
+        if authorized_rooms.contains(room_id) {
+            warn!(
+                "Bot isn't authorized to join room `{}`, declining invitation",
+                room_id
+            );
+            room.reject_invitation().await.unwrap();
+            return;
+        }
+
+        debug!("Autojoining room {}", room.room_id());
+        let mut delay = 2;
+
+        while let Err(err) = room.accept_invitation().await {
+            // retry autojoin due to synapse sending invites, before the
+            // invited user can join for more information see
+            // https://github.com/matrix-org/synapse/issues/4345
+            warn!(
+                "Failed to join room {} ({:?}), retrying in {}s",
+                room.room_id(),
+                err,
+                delay
+            );
+
+            sleep(Duration::from_secs(delay)).await;
+            delay *= 2;
+
+            if delay > 3600 {
+                error!("Can't join room {} ({:?})", room.room_id(), err);
+                break;
+            }
+        }
+        info!("Successfully joined room {}", room.room_id());
+    }
+}
diff --git a/src/bot/handlers/mod.rs b/src/bot/handlers/mod.rs
new file mode 100644
index 0000000..e676b34
--- /dev/null
+++ b/src/bot/handlers/mod.rs
@@ -0,0 +1 @@
+pub mod autojoin;
diff --git a/src/bot/mod.rs b/src/bot/mod.rs
new file mode 100644
index 0000000..8da7ecc
--- /dev/null
+++ b/src/bot/mod.rs
@@ -0,0 +1,102 @@
+use std::{
+    fs::File,
+    io::{BufReader, BufWriter},
+};
+
+use matrix_sdk::{
+    room::Room,
+    ruma::events::{room::member::MemberEventContent, StrippedStateEvent},
+    Client, ClientConfig, Session, SyncSettings,
+};
+use tracing::{debug, info};
+
+use crate::config::ProloloConfig;
+
+mod handlers;
+use handlers::autojoin::autojoin_authorized_rooms;
+
+pub struct Prololo {
+    client: Client,
+    config: ProloloConfig,
+}
+
+impl Prololo {
+    /// Creates a new [`Prololo`] bot and builds a [`matrix_sdk::Client`] using the provided
+    /// [`Config`].
+    ///
+    /// The [`Client`] is only initialized, not ready to be used yet.
+    pub fn new(config: ProloloConfig) -> anyhow::Result<Self> {
+        let client_config = ClientConfig::new().store_path(config.matrix_state_dir.join("store"));
+        let client = Client::new_with_config(config.matrix_homeserver.clone(), client_config)?;
+
+        Ok(Self { client, config })
+    }
+
+    /// Loads session information from file, or creates it if no previous session is found.
+    ///
+    /// The bot is ready to run once this function has been called.
+    pub async fn init(&self) -> anyhow::Result<()> {
+        self.load_or_init_session().await?;
+
+        let authorized_rooms = vec![self.config.matrix_room_id.clone()];
+
+        self.client
+            .register_event_handler({
+                move |ev: StrippedStateEvent<MemberEventContent>, client: Client, room: Room| {
+                    let authorized_rooms = authorized_rooms.clone();
+                    debug!("handler!!!second");
+                    async move { autojoin_authorized_rooms(ev, client, room, authorized_rooms).await }
+                }
+            })
+            .await;
+
+        Ok(())
+    }
+
+    /// Start listening to Matrix events.
+    ///
+    /// [`Prololo::init`] **must** be called before this function, otherwise the [`Client`] isn't
+    /// logged in.
+    pub async fn run(&self) {
+        debug!("running...");
+        self.client.sync(SyncSettings::default()).await
+    }
+
+    /// This loads the session information from an existing file, and tries to login with it. If no such
+    /// file is found, then login using username and password, and save the new session information on
+    /// disk.
+    async fn load_or_init_session(&self) -> anyhow::Result<()> {
+        let session_file = self.config.matrix_state_dir.join("session.yaml");
+
+        if session_file.is_file() {
+            let reader = BufReader::new(File::open(session_file)?);
+            let session: Session = serde_yaml::from_reader(reader)?;
+
+            self.client.restore_login(session.clone()).await?;
+            info!("Reused session: {}, {}", session.user_id, session.device_id);
+        } else {
+            let response = self
+                .client
+                .login(
+                    &self.config.matrix_username,
+                    &self.config.matrix_password,
+                    None,
+                    Some("autojoin bot"),
+                )
+                .await?;
+
+            info!("logged in as {}", self.config.matrix_username);
+
+            let session = Session {
+                access_token: response.access_token,
+                user_id: response.user_id,
+                device_id: response.device_id,
+            };
+
+            let writer = BufWriter::new(File::create(session_file)?);
+            serde_yaml::to_writer(writer, &session)?;
+        }
+
+        Ok(())
+    }
+}
diff --git a/src/config.rs b/src/config.rs
new file mode 100644
index 0000000..8970830
--- /dev/null
+++ b/src/config.rs
@@ -0,0 +1,20 @@
+use std::path::PathBuf;
+
+use matrix_sdk::ruma::RoomId;
+use serde::Deserialize;
+use url::Url;
+
+#[derive(Debug, Deserialize)]
+pub struct ProloloConfig {
+    /// The URL for the homeserver we should connect to
+    pub matrix_homeserver: Url,
+    /// The bot's account username
+    pub matrix_username: String,
+    /// The bot's account password
+    pub matrix_password: String,
+    /// Path to a directory where the bot will store Matrix state and current session information.
+    pub matrix_state_dir: PathBuf,
+    /// ID of the Matrix room where the bot should post messages. The bot will only accept
+    /// invitations to this room.
+    pub matrix_room_id: RoomId,
+}
diff --git a/src/main.rs b/src/main.rs
index e7a11a9..64dacf2 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,3 +1,34 @@
-fn main() {
-    println!("Hello, world!");
+use std::fs::File;
+use std::io::BufReader;
+use std::path::PathBuf;
+
+use clap::Clap;
+
+mod bot;
+use bot::Prololo;
+
+mod config;
+use config::ProloloConfig;
+
+#[derive(Clap)]
+#[clap(version = "0.1")]
+struct Opts {
+    /// File where session information will be saved
+    #[clap(short, long, parse(from_os_str))]
+    config: PathBuf,
+}
+
+#[tokio::main]
+async fn main() -> anyhow::Result<()> {
+    tracing_subscriber::fmt::init();
+
+    let opts = Opts::parse();
+    let config_file = opts.config;
+    let config: ProloloConfig = serde_yaml::from_reader(BufReader::new(File::open(config_file)?))?;
+
+    let prololo = Prololo::new(config)?;
+    prololo.init().await?;
+    prololo.run().await;
+
+    Ok(())
 }