feat: with nats

Signed-off-by: kjuulh <contact@kjuulh.io>

Cargo.lock

@@ -38,6 +38,32 @@ version = "1.0.75"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a4668cab20f66d8d020e1fbc0ebe47217433c1b6c8f2040faf858554e394ace6"
 
+[[package]]
+name = "async-channel"
+version = "1.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "81953c529336010edd6d8e358f886d9581267795c61b19475b71314bffa46d35"
+dependencies = [
+ "concurrent-queue",
+ "event-listener",
+ "futures-core",
+]
+
+[[package]]
+name = "async-lock"
+version = "2.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "287272293e9d8c41773cec55e365490fe034813a2f172f502d6ddcf75b2f582b"
+dependencies = [
+ "event-listener",
+]
+
+[[package]]
+name = "async-task"
+version = "4.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ecc7ab41815b3c653ccd2978ec3255c81349336702dfdf62ee6f7069b12a3aae"
+
 [[package]]
 name = "async-trait"
 version = "0.1.73"
@@ -49,6 +75,12 @@ dependencies = [
  "syn 2.0.35",
 ]
 
+[[package]]
+name = "atomic-waker"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1181e1e0d1fce796a03db1ae795d67167da795f9cf4a39c37589e85ef57f26d3"
+
 [[package]]
 name = "atty"
 version = "0.2.14"
@@ -81,12 +113,33 @@ dependencies = [
  "rustc-demangle",
 ]
 
+[[package]]
+name = "base64"
+version = "0.13.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9e1b586273c5702936fe7b7d6896644d8be71e6314cfe09d3167c95f712589e8"
+
 [[package]]
 name = "base64"
 version = "0.21.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9ba43ea6f343b788c8764558649e08df62f86c6ef251fdaeb1ffd010a9ae50a2"
 
+[[package]]
+name = "base64-url"
+version = "1.4.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "67a99c239d0c7e77c85dddfa9cebce48704b3c49550fcd3b84dd637e4484899f"
+dependencies = [
+ "base64 0.13.1",
+]
+
+[[package]]
+name = "base64ct"
+version = "1.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6b4d9b1225d28d360ec6a231d65af1fd99a2a095154c8040689617290569c5c"
+
 [[package]]
 name = "bitflags"
 version = "1.3.2"
@@ -99,6 +152,30 @@ version = "2.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b4682ae6287fcf752ecaabbfcc7b6f9b72aa33933dc23a554d853aea8eea8635"
 
+[[package]]
+name = "block-buffer"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4152116fd6e9dadb291ae18fc1ec3575ed6d84c29642d97890f4b4a3417297e4"
+dependencies = [
+ "generic-array",
+]
+
+[[package]]
+name = "blocking"
+version = "1.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77231a1c8f801696fc0123ec6150ce92cffb8e164a02afb9c8ddee0e9b65ad65"
+dependencies = [
+ "async-channel",
+ "async-lock",
+ "async-task",
+ "atomic-waker",
+ "fastrand 1.9.0",
+ "futures-lite",
+ "log",
+]
+
 [[package]]
 name = "bumpalo"
 version = "3.14.0"
@@ -211,6 +288,46 @@ dependencies = [
  "os_str_bytes",
 ]
 
+[[package]]
+name = "concurrent-queue"
+version = "2.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "62ec6771ecfa0762d24683ee5a32ad78487a3d3afdc0fb8cae19d2c5deb50b7c"
+dependencies = [
+ "crossbeam-utils",
+]
+
+[[package]]
+name = "const-oid"
+version = "0.6.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9d6f2aa4d0537bcc1c74df8755072bd31c1ef1a3a1b85a68e8404a8c353b7b8b"
+
+[[package]]
+name = "core-foundation"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "194a7a9e6de53fa55116934067c844d9d749312f75c6f6d0980e8c252f8c2146"
+dependencies = [
+ "core-foundation-sys",
+ "libc",
+]
+
+[[package]]
+name = "core-foundation-sys"
+version = "0.8.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e496a50fda8aacccc86d7529e2c1e0892dbd0f898a6b5645b5561b89c3210efa"
+
+[[package]]
+name = "cpufeatures"
+version = "0.2.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a17b76ff3a4162b0b27f354a0c87015ddad39d35f9c0c36607a3bdd175dde1f1"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "criterion"
 version = "0.4.0"
@@ -298,6 +415,7 @@ dependencies = [
  "async-trait",
  "crunch-envelope",
  "crunch-in-memory",
+ "crunch-nats",
  "crunch-traits",
  "futures",
  "thiserror",
@@ -312,7 +430,7 @@ dependencies = [
 name = "crunch-envelope"
 version = "0.1.0"
 dependencies = [
- "base64",
+ "base64 0.21.4",
  "bytes 0.4.12",
  "capnp",
  "capnpc",
@@ -339,6 +457,21 @@ dependencies = [
  "tracing",
 ]
 
+[[package]]
+name = "crunch-nats"
+version = "0.1.0"
+dependencies = [
+ "anyhow",
+ "async-trait",
+ "crunch-traits",
+ "futures",
+ "nats",
+ "thiserror",
+ "tokio",
+ "tokio-stream",
+ "tracing",
+]
+
 [[package]]
 name = "crunch-traits"
 version = "0.1.0"
@@ -351,6 +484,73 @@ dependencies = [
  "uuid",
 ]
 
+[[package]]
+name = "curve25519-dalek"
+version = "3.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0b9fdf9972b2bd6af2d913799d9ebc165ea4d2e65878e329d9c6b372c4491b61"
+dependencies = [
+ "byteorder",
+ "digest",
+ "rand_core 0.5.1",
+ "subtle",
+ "zeroize",
+]
+
+[[package]]
+name = "data-encoding"
+version = "2.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c2e66c9d817f1720209181c316d28635c050fa304f9c79e47a520882661b7308"
+
+[[package]]
+name = "der"
+version = "0.4.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "79b71cca7d95d7681a4b3b9cdf63c8dbc3730d0584c2c74e31416d64a90493f4"
+dependencies = [
+ "const-oid",
+]
+
+[[package]]
+name = "deranged"
+version = "0.3.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f2696e8a945f658fd14dc3b87242e6b80cd0f36ff04ea560fa39082368847946"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "digest"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d3dd60d1080a57a05ab032377049e0591415d2b31afd7028356dbf3cc6dcb066"
+dependencies = [
+ "generic-array",
+]
+
+[[package]]
+name = "ed25519"
+version = "1.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91cff35c70bba8a626e3185d8cd48cc11b5437e1a5bcd15b9b5fa3c64b6dfee7"
+dependencies = [
+ "signature",
+]
+
+[[package]]
+name = "ed25519-dalek"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c762bae6dcaf24c4c84667b8579785430908723d5c889f469d76a41d59cc7a9d"
+dependencies = [
+ "curve25519-dalek",
+ "ed25519",
+ "sha2",
+ "zeroize",
+]
+
 [[package]]
 name = "either"
 version = "1.9.0"
@@ -378,6 +578,12 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "event-listener"
+version = "2.5.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0206175f82b8d6bf6652ff7d71a1e27fd2e4efde587fd368662814d6ec1d9ce0"
+
 [[package]]
 name = "failure"
 version = "0.1.8"
@@ -387,6 +593,15 @@ dependencies = [
  "backtrace",
 ]
 
+[[package]]
+name = "fastrand"
+version = "1.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e51093e27b0797c359783294ca4f0a911c270184cb10f85783b118614a1501be"
+dependencies = [
+ "instant",
+]
+
 [[package]]
 name = "fastrand"
 version = "2.0.0"
@@ -399,6 +614,15 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "86d4de0081402f5e88cdac65c8dcdcc73118c1a7a465e2a05f0da05843a8ea33"
 
+[[package]]
+name = "form_urlencoded"
+version = "1.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a62bc1cf6f830c2ec14a513a9fb124d0a213a629668a4186f329db21fe045652"
+dependencies = [
+ "percent-encoding",
+]
+
 [[package]]
 name = "futures"
 version = "0.3.28"
@@ -447,6 +671,21 @@ version = "0.3.28"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4fff74096e71ed47f8e023204cfd0aa1289cd54ae5430a9523be060cdb849964"
 
+[[package]]
+name = "futures-lite"
+version = "1.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49a9d51ce47660b1e808d3c990b4709f2f415d928835a17dfd16991515c46bce"
+dependencies = [
+ "fastrand 1.9.0",
+ "futures-core",
+ "futures-io",
+ "memchr",
+ "parking",
+ "pin-project-lite",
+ "waker-fn",
+]
+
 [[package]]
 name = "futures-macro"
 version = "0.3.28"
@@ -488,6 +727,16 @@ dependencies = [
  "slab",
 ]
 
+[[package]]
+name = "generic-array"
+version = "0.14.7"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
+dependencies = [
+ "typenum",
+ "version_check",
+]
+
 [[package]]
 name = "getrandom"
 version = "0.2.10"
@@ -541,6 +790,16 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "443144c8cdadd93ebf52ddb4056d257f5b52c04d3c804e657d19eb73fc33668b"
 
+[[package]]
+name = "idna"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7d20d6b07bfbc108882d88ed8e37d39636dcc260e15e30c45e6ba089610b917c"
+dependencies = [
+ "unicode-bidi",
+ "unicode-normalization",
+]
+
 [[package]]
 name = "indexmap"
 version = "1.9.3"
@@ -551,6 +810,15 @@ dependencies = [
  "hashbrown",
 ]
 
+[[package]]
+name = "instant"
+version = "0.1.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7a5bbe824c507c5da5956355e86a746d82e0e1464f65d862cc5e71da70e94b2c"
+dependencies = [
+ "cfg-if",
+]
+
 [[package]]
 name = "iovec"
 version = "0.1.4"
@@ -593,6 +861,12 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "json"
+version = "0.12.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "078e285eafdfb6c4b434e0d31e8cfcb5115b651496faca5749b88fafd4f23bfd"
+
 [[package]]
 name = "lazy_static"
 version = "1.4.0"
@@ -668,6 +942,57 @@ version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2eb04b9f127583ed176e163fb9ec6f3e793b87e21deedd5734a69386a18a0151"
 
+[[package]]
+name = "nats"
+version = "0.24.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2eebb39ba0555bcf232817d42ed3346499f14f6f8d4de1c0ca4517bda99c1a7b"
+dependencies = [
+ "base64 0.13.1",
+ "base64-url",
+ "blocking",
+ "crossbeam-channel",
+ "fastrand 1.9.0",
+ "itoa",
+ "json",
+ "lazy_static",
+ "libc",
+ "log",
+ "memchr",
+ "nkeys",
+ "nuid",
+ "once_cell",
+ "parking_lot",
+ "regex",
+ "ring",
+ "rustls",
+ "rustls-native-certs",
+ "rustls-pemfile",
+ "serde",
+ "serde_json",
+ "serde_nanos",
+ "serde_repr",
+ "time",
+ "url",
+ "webpki",
+ "winapi",
+]
+
+[[package]]
+name = "nkeys"
+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0e66a7cd1358277b2a6f77078e70aea7315ff2f20db969cc61153103ec162594"
+dependencies = [
+ "byteorder",
+ "data-encoding",
+ "ed25519-dalek",
+ "getrandom",
+ "log",
+ "rand",
+ "signatory",
+]
+
 [[package]]
 name = "nu-ansi-term"
 version = "0.46.0"
@@ -678,6 +1003,16 @@ dependencies = [
  "winapi",
 ]
 
+[[package]]
+name = "nuid"
+version = "0.3.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "20c1bb65186718d348306bf1afdeb20d9ab45b2ab80fb793c0fdcf59ffbb4f38"
+dependencies = [
+ "lazy_static",
+ "rand",
+]
+
 [[package]]
 name = "num-traits"
 version = "0.2.16"
@@ -718,6 +1053,18 @@ version = "11.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ab1bc2a289d34bd04a330323ac98a1b4bc82c9d9fcb1e66b63caa84da26b575"
 
+[[package]]
+name = "opaque-debug"
+version = "0.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "624a8340c38c1b80fd549087862da4ba43e08858af025b236e509b6649fc13d5"
+
+[[package]]
+name = "openssl-probe"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ff011a302c396a5197692431fc1948019154afc178baf7d8e37367442a4601cf"
+
 [[package]]
 name = "os_str_bytes"
 version = "6.5.1"
@@ -730,6 +1077,12 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b15813163c1d831bf4a13c3610c05c0d03b39feb07f7e09fa234dac9b15aaf39"
 
+[[package]]
+name = "parking"
+version = "2.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "14f2252c834a40ed9bb5422029649578e63aa341ac401f74e719dd1afda8394e"
+
 [[package]]
 name = "parking_lot"
 version = "0.12.1"
@@ -753,6 +1106,21 @@ dependencies = [
  "windows-targets",
 ]
 
+[[package]]
+name = "pem-rfc7468"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "84e93a3b1cc0510b03020f33f21e62acdde3dcaef432edc95bea377fbd4c2cd4"
+dependencies = [
+ "base64ct",
+]
+
+[[package]]
+name = "percent-encoding"
+version = "2.3.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b2a4787296e9989611394c33f193f676704af1686e70b8f8033ab5ba9a35a94"
+
 [[package]]
 name = "petgraph"
 version = "0.4.13"
@@ -774,6 +1142,18 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8b870d8c151b6f2fb93e84a13146138f05d02ed11c7e7c54f8826aaaf7c9f184"
 
+[[package]]
+name = "pkcs8"
+version = "0.7.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ee3ef9b64d26bad0536099c816c6734379e45bbd5f14798def6809e5cc350447"
+dependencies = [
+ "der",
+ "pem-rfc7468",
+ "spki",
+ "zeroize",
+]
+
 [[package]]
 name = "plotters"
 version = "0.3.5"
@@ -802,6 +1182,12 @@ dependencies = [
  "plotters-backend",
 ]
 
+[[package]]
+name = "ppv-lite86"
+version = "0.2.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5b40af805b3121feab8a3c29f04d8ad262fa8e0561883e7653e024ae4479e6de"
+
 [[package]]
 name = "proc-macro2"
 version = "0.4.30"
@@ -922,6 +1308,42 @@ dependencies = [
  "proc-macro2 1.0.67",
 ]
 
+[[package]]
+name = "rand"
+version = "0.8.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "34af8d1a0e25924bc5b7c43c079c942339d8f0a8b57c39049bef581b46327404"
+dependencies = [
+ "libc",
+ "rand_chacha",
+ "rand_core 0.6.4",
+]
+
+[[package]]
+name = "rand_chacha"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e6c10a63a0fa32252be49d21e7709d4d4baf8d231c2dbce1eaa8141b9b127d88"
+dependencies = [
+ "ppv-lite86",
+ "rand_core 0.6.4",
+]
+
+[[package]]
+name = "rand_core"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "90bde5296fc891b0cef12a6d03ddccc162ce7b2aff54160af9338f8d40df6d19"
+
+[[package]]
+name = "rand_core"
+version = "0.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ec0be4795e2f6a28069bec0b5ff3e2ac9bafc99e6a9a7dc3547996c5c816922c"
+dependencies = [
+ "getrandom",
+]
+
 [[package]]
 name = "rayon"
 version = "1.7.0"
@@ -982,6 +1404,21 @@ version = "0.7.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dbb5fb1acd8a1a18b3dd5be62d25485eb770e05afb408a9627d14d451bae12da"
 
+[[package]]
+name = "ring"
+version = "0.16.20"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3053cf52e236a3ed746dfc745aa9cacf1b791d846bdaf412f60a8d7d6e17c8fc"
+dependencies = [
+ "cc",
+ "libc",
+ "once_cell",
+ "spin",
+ "untrusted",
+ "web-sys",
+ "winapi",
+]
+
 [[package]]
 name = "rustc-demangle"
 version = "0.1.23"
@@ -1001,6 +1438,40 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "rustls"
+version = "0.19.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "35edb675feee39aec9c99fa5ff985081995a06d594114ae14cbe797ad7b7a6d7"
+dependencies = [
+ "base64 0.13.1",
+ "log",
+ "ring",
+ "sct",
+ "webpki",
+]
+
+[[package]]
+name = "rustls-native-certs"
+version = "0.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5a07b7c1885bd8ed3831c289b7870b13ef46fe0e856d288c30d9cc17d75a2092"
+dependencies = [
+ "openssl-probe",
+ "rustls",
+ "schannel",
+ "security-framework",
+]
+
+[[package]]
+name = "rustls-pemfile"
+version = "0.2.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5eebeaeb360c87bfb72e84abdb3447159c0eaececf1bef2aecd65a8be949d1c9"
+dependencies = [
+ "base64 0.13.1",
+]
+
 [[package]]
 name = "ryu"
 version = "1.0.15"
@@ -1016,12 +1487,54 @@ dependencies = [
  "winapi-util",
 ]
 
+[[package]]
+name = "schannel"
+version = "0.1.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0c3733bf4cf7ea0880754e19cb5a462007c4a8c1914bff372ccc95b464f1df88"
+dependencies = [
+ "windows-sys",
+]
+
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 
+[[package]]
+name = "sct"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b362b83898e0e69f38515b82ee15aa80636befe47c3b6d3d89a911e78fc228ce"
+dependencies = [
+ "ring",
+ "untrusted",
+]
+
+[[package]]
+name = "security-framework"
+version = "2.9.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "05b64fb303737d99b81884b2c63433e9ae28abebe5eb5045dcdd175dc2ecf4de"
+dependencies = [
+ "bitflags 1.3.2",
+ "core-foundation",
+ "core-foundation-sys",
+ "libc",
+ "security-framework-sys",
+]
+
+[[package]]
+name = "security-framework-sys"
+version = "2.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e932934257d3b408ed8f30db49d85ea163bfe74961f017f405b025af298f0c7a"
+dependencies = [
+ "core-foundation-sys",
+ "libc",
+]
+
 [[package]]
 name = "serde"
 version = "1.0.188"
@@ -1053,6 +1566,39 @@ dependencies = [
  "serde",
 ]
 
+[[package]]
+name = "serde_nanos"
+version = "0.1.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ae801b7733ca8d6a2b580debe99f67f36826a0f5b8a36055dc6bc40f8d6bc71"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "serde_repr"
+version = "0.1.16"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8725e1dfadb3a50f7e5ce0b1a540466f6ed3fe7a0fca2ac2b8b831d31316bd00"
+dependencies = [
+ "proc-macro2 1.0.67",
+ "quote 1.0.33",
+ "syn 2.0.35",
+]
+
+[[package]]
+name = "sha2"
+version = "0.9.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4d58a1e1bf39749807d89cf2d98ac2dfa0ff1cb3faa38fbb64dd88ac8013d800"
+dependencies = [
+ "block-buffer",
+ "cfg-if",
+ "cpufeatures",
+ "digest",
+ "opaque-debug",
+]
+
 [[package]]
 name = "sharded-slab"
 version = "0.1.4"
@@ -1071,6 +1617,24 @@ dependencies = [
  "libc",
 ]
 
+[[package]]
+name = "signatory"
+version = "0.23.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5dfecc059e81632eef1dd9b79e22fc28b8fe69b30d3357512a77a0ad8ee3c782"
+dependencies = [
+ "pkcs8",
+ "rand_core 0.6.4",
+ "signature",
+ "zeroize",
+]
+
+[[package]]
+name = "signature"
+version = "1.6.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "74233d3b3b2f6d4b006dc19dee745e73e2a6bfb6f93607cd3b02bd5b00797d7c"
+
 [[package]]
 name = "slab"
 version = "0.4.9"
@@ -1096,6 +1660,27 @@ dependencies = [
  "windows-sys",
 ]
 
+[[package]]
+name = "spin"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e63cff320ae2c57904679ba7cb63280a3dc4613885beafb148ee7bf9aa9042d"
+
+[[package]]
+name = "spki"
+version = "0.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c01a0c15da1b0b0e1494112e7af814a678fec9bd157881b49beac661e9b6f32"
+dependencies = [
+ "der",
+]
+
+[[package]]
+name = "subtle"
+version = "2.5.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "81cdd64d312baedb58e21336b31bc043b77e01cc99033ce76ef539f78e965ebc"
+
 [[package]]
 name = "syn"
 version = "0.15.44"
@@ -1125,7 +1710,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cb94d2f3cc536af71caac6b6fcebf65860b347e7ce0cc9ebe8f70d3e521054ef"
 dependencies = [
  "cfg-if",
- "fastrand",
+ "fastrand 2.0.0",
  "redox_syscall",
  "rustix",
  "windows-sys",
@@ -1174,6 +1759,34 @@ dependencies = [
  "once_cell",
 ]
 
+[[package]]
+name = "time"
+version = "0.3.28"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "17f6bb557fd245c28e6411aa56b6403c689ad95061f50e4be16c274e70a17e48"
+dependencies = [
+ "deranged",
+ "itoa",
+ "serde",
+ "time-core",
+ "time-macros",
+]
+
+[[package]]
+name = "time-core"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7300fbefb4dadc1af235a9cef3737cea692a9d97e1b9cbcd4ebdae6f8868e6fb"
+
+[[package]]
+name = "time-macros"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a942f44339478ef67935ab2bbaec2fb0322496cf3cbe84b261e06ac3814c572"
+dependencies = [
+ "time-core",
+]
+
 [[package]]
 name = "tinytemplate"
 version = "1.2.1"
@@ -1184,6 +1797,21 @@ dependencies = [
  "serde_json",
 ]
 
+[[package]]
+name = "tinyvec"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "87cc5ceb3875bb20c2890005a4e226a4651264a5c75edb2421b52861a0a0cb50"
+dependencies = [
+ "tinyvec_macros",
+]
+
+[[package]]
+name = "tinyvec_macros"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
+
 [[package]]
 name = "tokio"
 version = "1.32.0"
@@ -1298,12 +1926,33 @@ dependencies = [
  "tracing-log",
 ]
 
+[[package]]
+name = "typenum"
+version = "1.17.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "42ff0bf0c66b8238c6f3b578df37d0b7848e55df8577b3f74f92a69acceeb825"
+
+[[package]]
+name = "unicode-bidi"
+version = "0.3.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "92888ba5573ff080736b3648696b70cafad7d250551175acbaa4e0385b3e1460"
+
 [[package]]
 name = "unicode-ident"
 version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
 
+[[package]]
+name = "unicode-normalization"
+version = "0.1.22"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c5713f0fc4b5db668a2ac63cdb7bb4469d8c9fed047b1d0292cc7b0ce2ba921"
+dependencies = [
+ "tinyvec",
+]
+
 [[package]]
 name = "unicode-segmentation"
 version = "1.10.1"
@@ -1316,6 +1965,23 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
 
+[[package]]
+name = "untrusted"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a156c684c91ea7d62626509bce3cb4e1d9ed5c4d978f7b4352658f96a4c26b4a"
+
+[[package]]
+name = "url"
+version = "2.4.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "143b538f18257fac9cad154828a57c6bf5157e1aa604d4816b5995bf6de87ae5"
+dependencies = [
+ "form_urlencoded",
+ "idna",
+ "percent-encoding",
+]
+
 [[package]]
 name = "uuid"
 version = "1.4.1"
@@ -1331,6 +1997,18 @@ version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "830b7e5d4d90034032940e4ace0d9a9a057e7a45cd94e6c007832e39edb82f6d"
 
+[[package]]
+name = "version_check"
+version = "0.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
+
+[[package]]
+name = "waker-fn"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9d5b2c62b4012a3e1eca5a7e077d13b3bf498c4073e33ccd58626607748ceeca"
+
 [[package]]
 name = "walkdir"
 version = "2.4.0"
@@ -1411,6 +2089,16 @@ dependencies = [
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "webpki"
+version = "0.21.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b8e38c0608262c46d4a56202ebabdeb094cef7e560ca7a226c6bf055188aa4ea"
+dependencies = [
+ "ring",
+ "untrusted",
+]
+
 [[package]]
 name = "which"
 version = "2.0.1"
@@ -1517,3 +2205,23 @@ name = "windows_x86_64_msvc"
 version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
+
+[[package]]
+name = "zeroize"
+version = "1.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2a0956f1ba7c7909bfb66c2e9e4124ab6f6482560f6628b5aaeba39207c9aad9"
+dependencies = [
+ "zeroize_derive",
+]
+
+[[package]]
+name = "zeroize_derive"
+version = "1.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ce36e65b0d2999d2aafac989fb249189a141aee1f53c612c1f37d72631959f69"
+dependencies = [
+ "proc-macro2 1.0.67",
+ "quote 1.0.33",
+ "syn 2.0.35",
+]

Cargo.toml

@@ -7,6 +7,7 @@ crunch = { path = "crates/crunch" }
 crunch-traits = { path = "crates/crunch-traits" }
 crunch-envelope = { path = "crates/crunch-envelope" }
 crunch-in-memory = { path = "crates/crunch-in-memory" }
+crunch-nats = { path = "crates/crunch-nats" }
 
 anyhow = { version = "1.0.71" }
 tokio = { version = "1", features = ["full"] }
@@ -17,3 +18,4 @@ thiserror = {version = "1.0.48"}
 async-trait = "0.1.73"
 uuid = { version = "1.4.1", features = ["v4"]}
 futures = "0.3.28"
+nats = "0.24.0"

crates/crunch-in-memory/src/lib.rs

@@ -3,7 +3,7 @@ use std::{collections::BTreeMap, pin::Pin};
 use async_trait::async_trait;
 use crunch_traits::{errors::TransportError, EventInfo, Transport};
 use futures::Stream;
-use tokio::sync::broadcast::{Receiver, Sender};
+use tokio::sync::broadcast::Sender;
 use tokio_stream::{wrappers::BroadcastStream, StreamExt};
 
 #[derive(Clone)]

crates/crunch-nats/Cargo.toml

@@ -0,0 +1,18 @@
+[package]
+name = "crunch-nats"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+crunch-traits.workspace = true
+
+nats = {workspace = true}
+anyhow.workspace = true
+tracing.workspace = true
+tokio.workspace = true
+thiserror.workspace = true
+async-trait.workspace = true
+futures.workspace = true
+tokio-stream = {workspace = true, features = ["sync"]}

crates/crunch-nats/src/lib.rs

@@ -0,0 +1,83 @@
+use std::pin::Pin;
+
+use async_trait::async_trait;
+use crunch_traits::{errors::TransportError, EventInfo, Transport};
+use futures::Stream;
+
+pub struct NatsConnectOptions<'a> {
+    pub host: &'a str,
+    pub credentials: NatsConnectCredentials<'a>,
+}
+pub enum NatsConnectCredentials<'a> {
+    UserPass { user: &'a str, pass: &'a str },
+}
+
+#[derive(Clone)]
+pub struct NatsTransport {
+    conn: nats::asynk::Connection,
+}
+
+impl NatsTransport {
+    pub async fn new(options: NatsConnectOptions<'_>) -> Result<Self, TransportError> {
+        let conn = match options.credentials {
+            NatsConnectCredentials::UserPass { user, pass } => {
+                nats::asynk::Options::with_user_pass(user, pass)
+                    .connect(options.host)
+                    .await
+                    .map_err(|e| anyhow::anyhow!(e))
+                    .map_err(TransportError::Err)?
+            }
+        };
+
+        Ok(Self { conn })
+    }
+}
+
+#[async_trait]
+impl Transport for NatsTransport {
+    type Stream = Pin<Box<dyn Stream<Item = Vec<u8>> + Send>>;
+
+    async fn publish(
+        &self,
+        event_info: &EventInfo,
+        content: Vec<u8>,
+    ) -> Result<(), TransportError> {
+        self.conn
+            .publish(&event_info.transport_name(), &content)
+            .await
+            .map_err(|e| anyhow::anyhow!(e))
+            .map_err(TransportError::Err)
+    }
+    async fn subscriber(
+        &self,
+        event_info: &EventInfo,
+    ) -> Result<Option<Self::Stream>, TransportError> {
+        let sub = self
+            .conn
+            .subscribe(&event_info.transport_name())
+            .await
+            .map_err(|e| anyhow::anyhow!(e))
+            .map_err(TransportError::Err)?;
+
+        let stream = futures::stream::unfold(sub, |sub| async move {
+            let next = sub.next().await?;
+            let next = next.data;
+            Some((next, sub))
+        });
+
+        Ok(Some(Box::pin(stream)))
+    }
+}
+
+trait EventInfoExt {
+    fn transport_name(&self) -> String;
+}
+
+impl EventInfoExt for EventInfo {
+    fn transport_name(&self) -> String {
+        format!(
+            "crunch.{}.{}.{}",
+            self.domain, self.entity_type, self.event_name
+        )
+    }
+}

crates/crunch/Cargo.toml

@@ -7,6 +7,7 @@ edition = "2021"
 crunch-envelope.workspace = true
 crunch-in-memory = { workspace = true, optional = true }
 crunch-traits.workspace = true
+crunch-nats = {workspace = true,optional = true}
 
 anyhow.workspace = true
 tracing.workspace = true
@@ -21,6 +22,7 @@ futures.workspace = true
 tracing-subscriber.workspace = true
 
 [features]
-default = ["in-memory", "traits"]
+default = ["in-memory", "traits", "nats"]
 traits = []
-in-memory = ["dep:crunch-in-memory"]
+in-memory = ["dep:crunch-in-memory"]
+nats = ["dep:crunch-nats"]

crates/crunch/src/lib.rs

@@ -20,6 +20,11 @@ pub use publisher::Publisher;
 pub use subscriber::Subscriber;
 pub use transport::Transport;
 
+#[cfg(feature = "nats")]
+pub mod nats {
+    pub use crunch_nats::{NatsConnectCredentials, NatsConnectOptions};
+}
+
 #[derive(Clone)]
 pub struct Crunch {
     publisher: Publisher,
@@ -74,6 +79,15 @@ pub mod builder {
             self
         }
 
+        #[cfg(feature = "nats")]
+        pub async fn with_nats_transport(
+            &mut self,
+            options: crate::nats::NatsConnectOptions<'_>,
+        ) -> Result<&mut Self, crunch_traits::errors::TransportError> {
+            self.transport = Some(Transport::nats(options).await?);
+            Ok(self)
+        }
+
         pub fn with_outbox(&mut self, enabled: bool) -> &mut Self {
             self.outbox_enabled = enabled;
             self

crates/crunch/src/transport.rs

@@ -14,6 +14,15 @@ impl Transport {
             crunch_in_memory::InMemoryTransport::default(),
         ))
     }
+
+    #[cfg(feature = "nats")]
+    pub async fn nats(
+        options: crate::nats::NatsConnectOptions<'_>,
+    ) -> Result<Self, crunch_traits::errors::TransportError> {
+        Ok(Self(std::sync::Arc::new(
+            crunch_nats::NatsTransport::new(options).await?,
+        )))
+    }
 }
 
 impl From<DynTransport> for Transport {