diff --git a/.github/workflows/rust.yaml b/.github/workflows/rust.yaml
index 217fa88..065ac37 100644
--- a/.github/workflows/rust.yaml
+++ b/.github/workflows/rust.yaml
@@ -40,13 +40,17 @@ jobs:
           profile: minimal
           toolchain: stable
           override: true
+          target: wasm32-unknown-unknown
       - uses: arduino/setup-protoc@v1
         with:
           version: '3.x'
+      - uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: --release --target wasm32-unknown-unknown
       - uses: actions-rs/cargo@v1
         with:
           command: test
-          args: --all-features
   fmt:
     name: Rustfmt
     runs-on: ubuntu-latest
diff --git a/Cargo.lock b/Cargo.lock
index d53b5da..814cf69 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2,13 +2,33 @@
 # It is not intended for manual editing.
 version = 3
 
+[[package]]
+name = "addr2line"
+version = "0.19.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a76fd60b23679b7d19bd066031410fb7e458ccc5e958eb5c325888ce4baedc97"
+dependencies = [
+ "gimli",
+]
+
 [[package]]
 name = "ahash"
 version = "0.7.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fcb51a0695d8f838b1ee009b3fbf66bda078cd64590202a864a8f3e8c4315c47"
 dependencies = [
- "getrandom",
+ "getrandom 0.2.7",
+ "once_cell",
+ "version_check",
+]
+
+[[package]]
+name = "ahash"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2c99f64d1e06488f620f932677e24bc6e2897582980441ae90a671415bd7ec2f"
+dependencies = [
+ "cfg-if",
  "once_cell",
  "version_check",
 ]
@@ -22,6 +42,15 @@ dependencies = [
  "memchr",
 ]
 
+[[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 = "1.0.64"
@@ -29,387 +58,1640 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b9a8f622bcf6ff3df478e9deba3e03e4e04b300f8e6a139e192c05fa3490afc7"
 
 [[package]]
-name = "bitflags"
-version = "1.3.2"
+name = "arbitrary"
+version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
+checksum = "e2d098ff73c1ca148721f37baad5ea6a465a13f9573aba8641fbbbae8164a54e"
 
 [[package]]
-name = "bytes"
-version = "1.2.1"
+name = "async-trait"
+version = "0.1.68"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ec8a7b6a70fde80372154c65702f00a0f56f3e1c36abbc6c440484be248856db"
+checksum = "b9ccdd8f2a161be9bd5c023df56f1b2a0bd1d83872ae53b71a84a12c9bf6e842"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 2.0.18",
+]
 
 [[package]]
-name = "cfg-if"
-version = "1.0.0"
+name = "atty"
+version = "0.2.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
+dependencies = [
+ "hermit-abi 0.1.19",
+ "libc",
+ "winapi",
+]
 
 [[package]]
-name = "either"
-version = "1.8.0"
+name = "autocfg"
+version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "90e5c1c8368803113bf0c9584fc495a58b86dc8a29edbf8fe877d21d9507e797"
+checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
 
 [[package]]
-name = "endian-type"
-version = "0.1.2"
+name = "base64"
+version = "0.21.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c34f04666d835ff5d62e058c3995147c06f42fe86ff053337632bca83e42702d"
+checksum = "604178f6c5c21f02dc555784810edfb88d34ac2c73b2eae109655649ee73ce3d"
 
 [[package]]
-name = "fastrand"
-version = "1.8.0"
+name = "bincode"
+version = "1.3.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a7a407cfaa3385c4ae6b23e84623d48c2798d06e3e6a1878f7f59f17b3f86499"
+checksum = "b1f45e9417d87227c7a56d22e471c6206462cba514c7590c09aff4cf6d1ddcad"
 dependencies = [
- "instant",
+ "serde",
 ]
 
 [[package]]
-name = "getrandom"
-version = "0.2.7"
+name = "bitflags"
+version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "4eb1a864a501629691edf6c15a593b7a51eebaa1e8468e9ddc623de7c9b58ec6"
-dependencies = [
- "cfg-if",
- "libc",
- "wasi",
-]
+checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 
 [[package]]
-name = "hashbrown"
-version = "0.12.3"
+name = "bitflags"
+version = "2.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8a9ee70c43aaf417c914396645a0fa852624801b24ebb7ae78fe8272889ac888"
-dependencies = [
- "ahash",
-]
+checksum = "6776fc96284a0bb647b615056fc496d1fe1644a7ab01829818a6d91cae888b84"
 
 [[package]]
-name = "instant"
-version = "0.1.12"
+name = "block-buffer"
+version = "0.10.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7a5bbe824c507c5da5956355e86a746d82e0e1464f65d862cc5e71da70e94b2c"
+checksum = "3078c7629b62d3f0439517fa394996acacc5cbc91c5a20d8c658e77abd503a71"
 dependencies = [
- "cfg-if",
+ "generic-array",
 ]
 
 [[package]]
-name = "itertools"
-version = "0.10.3"
+name = "bumpalo"
+version = "3.13.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a9a9d19fa1e79b6215ff29b9d6880b706147f16e9b1dbb1e4e5947b5b02bc5e3"
-dependencies = [
- "either",
-]
+checksum = "a3e2c3daef883ecc1b5d58c15adae93470a91d425f3532ba1695849656af3fc1"
 
 [[package]]
-name = "itoa"
-version = "1.0.3"
+name = "byteorder"
+version = "1.4.3"
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-checksum = "6c8af84674fe1f223a982c933a0ee1086ac4d4052aa0fb8060c12c6ad838e754"
+checksum = "14c189c53d098945499cdfa7ecc63567cf3886b3332b312a5b4585d8d3a6a610"
 
 [[package]]
-name = "libc"
-version = "0.2.132"
+name = "bytes"
+version = "1.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8371e4e5341c3a96db127eb2465ac681ced4c433e01dd0e938adbef26ba93ba5"
+checksum = "ec8a7b6a70fde80372154c65702f00a0f56f3e1c36abbc6c440484be248856db"
 
 [[package]]
-name = "log"
-version = "0.4.17"
+name = "cc"
+version = "1.0.79"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "abb12e687cfb44aa40f41fc3978ef76448f9b6038cad6aef4259d3c095a2382e"
+checksum = "50d30906286121d95be3d479533b458f87493b30a4b5f79a607db8f5d11aa91f"
 dependencies = [
- "cfg-if",
+ "jobserver",
 ]
 
 [[package]]
-name = "memchr"
-version = "2.5.0"
+name = "cfg-if"
+version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
-name = "nibble_vec"
-version = "0.1.0"
+name = "clap"
+version = "2.34.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "77a5d83df9f36fe23f0c3648c6bbb8b0298bb5f1939c8f2704431371f4b84d43"
+checksum = "a0610544180c38b88101fecf2dd634b174a62eef6946f84dfc6a7127512b381c"
 dependencies = [
- "smallvec",
+ "ansi_term",
+ "atty",
+ "bitflags 1.3.2",
+ "strsim",
+ "textwrap",
+ "unicode-width",
+ "vec_map",
 ]
 
 [[package]]
-name = "once_cell"
-version = "1.14.0"
+name = "cpp_demangle"
+version = "0.3.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2f7254b99e31cad77da24b08ebf628882739a608578bb1bcdfc1f9c21260d7c0"
+checksum = "eeaa953eaad386a53111e47172c2fedba671e5684c8dd601a5f474f4f118710f"
+dependencies = [
+ "cfg-if",
+]
 
 [[package]]
-name = "proc-macro2"
-version = "1.0.43"
+name = "cpufeatures"
+version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0a2ca2c61bc9f3d74d2886294ab7b9853abd9c1ad903a3ac7815c58989bb7bab"
+checksum = "3e4c1eaa2012c47becbbad2ab175484c2a84d1185b566fb2cc5b8707343dfe58"
 dependencies = [
- "unicode-ident",
+ "libc",
 ]
 
 [[package]]
-name = "prost"
-version = "0.11.0"
+name = "cranelift-bforest"
+version = "0.96.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "399c3c31cdec40583bb68f0b18403400d01ec4289c383aa047560439952c4dd7"
+checksum = "9c064a534a914eb6709d198525321a386dad50627aecfaf64053f369993a3e5a"
 dependencies = [
- "bytes",
- "prost-derive",
+ "cranelift-entity",
 ]
 
 [[package]]
-name = "prost-derive"
-version = "0.11.0"
+name = "cranelift-codegen"
+version = "0.96.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7345d5f0e08c0536d7ac7229952590239e77abf0a0100a1b1d890add6ea96364"
+checksum = "619ed4d24acef0bd58b16a1be39077c0b36c65782e6c933892439af5e799110e"
 dependencies = [
- "anyhow",
- "itertools",
- "proc-macro2",
- "quote",
- "syn",
+ "bumpalo",
+ "cranelift-bforest",
+ "cranelift-codegen-meta",
+ "cranelift-codegen-shared",
+ "cranelift-control",
+ "cranelift-entity",
+ "cranelift-isle",
+ "gimli",
+ "hashbrown 0.13.2",
+ "log",
+ "regalloc2",
+ "smallvec",
+ "target-lexicon",
 ]
 
 [[package]]
-name = "prost-types"
-version = "0.11.1"
+name = "cranelift-codegen-meta"
+version = "0.96.3"
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-checksum = "4dfaa718ad76a44b3415e6c4d53b17c8f99160dcb3a99b10470fce8ad43f6e3e"
+checksum = "c777ce22678ae1869f990b2f31e0cd7ca109049213bfc0baf3e2205a18b21ebb"
 dependencies = [
- "bytes",
- "prost",
+ "cranelift-codegen-shared",
 ]
 
 [[package]]
-name = "protobuf"
-version = "2.27.1"
+name = "cranelift-codegen-shared"
+version = "0.96.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cf7e6d18738ecd0902d30d1ad232c9125985a3422929b16c65517b38adc14f96"
+checksum = "eb65884d17a1fa55990dd851c43c140afb4c06c3312cf42cfa1222c3b23f9561"
+
+[[package]]
+name = "cranelift-control"
+version = "0.96.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9a0cea8abc90934d0a7ee189a29fd35fecd5c40f59ae7e6aab1805e8ab1a535e"
 dependencies = [
- "serde",
- "serde_derive",
+ "arbitrary",
 ]
 
 [[package]]
-name = "protobuf-codegen"
-version = "2.27.1"
+name = "cranelift-entity"
+version = "0.96.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aec1632b7c8f2e620343439a7dfd1f3c47b18906c4be58982079911482b5d707"
+checksum = "c2e50bebc05f2401a1320169314b62f91ad811ef20163cac00151d78e0684d4c"
 dependencies = [
- "protobuf",
+ "serde",
 ]
 
 [[package]]
-name = "protoc"
-version = "2.27.1"
+name = "cranelift-frontend"
+version = "0.96.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c2ef1dc036942fac2470fdb8a911f125404ee9129e9e807f3d12d8589001a38f"
+checksum = "7b82ccfe704d53f669791399d417928410785132d809ec46f5e2ce069e9d17c8"
 dependencies = [
+ "cranelift-codegen",
  "log",
- "which",
+ "smallvec",
+ "target-lexicon",
 ]
 
 [[package]]
-name = "protoc-rust"
-version = "2.27.1"
+name = "cranelift-isle"
+version = "0.96.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a9e315121c8e7e21396e940a3d27f92280a6d28e3931213bf6cbfea76c5cc94"
+checksum = "a2515d8e7836f9198b160b2c80aaa1f586d7749d57d6065af86223fb65b7e2c3"
+
+[[package]]
+name = "cranelift-native"
+version = "0.96.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bcb47ffdcdac7e9fed6e4a618939773a4dc4a412fa7da9e701ae667431a10af3"
 dependencies = [
- "protobuf",
- "protobuf-codegen",
- "protoc",
- "tempfile",
+ "cranelift-codegen",
+ "libc",
+ "target-lexicon",
 ]
 
 [[package]]
-name = "proxy-wasm"
-version = "0.2.0"
+name = "cranelift-wasm"
+version = "0.96.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3927081c2674366adadef4d5c5d34c4d849ab764a17bfe4ff2bd04436efb593d"
+checksum = "852390f92c3eaa457e42be44d174ff5abbbcd10062d5963bda8ffb2505e73a71"
 dependencies = [
- "hashbrown",
+ "cranelift-codegen",
+ "cranelift-entity",
+ "cranelift-frontend",
+ "itertools",
  "log",
+ "smallvec",
+ "wasmparser",
+ "wasmtime-types",
 ]
 
 [[package]]
-name = "quote"
-version = "1.0.21"
+name = "crc32fast"
+version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bbe448f377a7d6961e30f5955f9b8d106c3f5e449d493ee1b125c1d43c2b5179"
+checksum = "b540bd8bc810d3885c6ea91e2018302f68baba2129ab3e88f32389ee9370880d"
 dependencies = [
- "proc-macro2",
+ "cfg-if",
 ]
 
 [[package]]
-name = "radix_trie"
-version = "0.2.1"
+name = "crossbeam-channel"
+version = "0.5.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c069c179fcdc6a2fe24d8d18305cf085fdbd4f922c041943e203685d6a1c58fd"
+checksum = "a33c2bf77f2df06183c3aa30d1e96c0695a313d4f9c453cc3762a6db39f99200"
 dependencies = [
- "endian-type",
- "nibble_vec",
+ "cfg-if",
+ "crossbeam-utils",
 ]
 
 [[package]]
-name = "redox_syscall"
-version = "0.2.16"
+name = "crossbeam-deque"
+version = "0.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "fb5a58c1855b4b6819d59012155603f0b22ad30cad752600aadfcb695265519a"
+checksum = "ce6fd6f855243022dcecf8702fef0c297d4338e226845fe067f6341ad9fa0cef"
 dependencies = [
- "bitflags",
+ "cfg-if",
+ "crossbeam-epoch",
+ "crossbeam-utils",
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 [[package]]
-name = "regex"
-version = "1.6.0"
+name = "crossbeam-epoch"
+version = "0.9.14"
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+checksum = "46bd5f3f85273295a9d14aedfb86f6aadbff6d8f5295c4a9edb08e819dcf5695"
 dependencies = [
- "aho-corasick",
- "memchr",
- "regex-syntax",
+ "autocfg",
+ "cfg-if",
+ "crossbeam-utils",
+ "memoffset",
+ "scopeguard",
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 [[package]]
-name = "regex-syntax"
-version = "0.6.27"
+name = "crossbeam-utils"
+version = "0.8.15"
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-checksum = "a3f87b73ce11b1619a3c6332f45341e0047173771e8b8b73f87bfeefb7b56244"
+checksum = "3c063cd8cc95f5c377ed0d4b49a4b21f632396ff690e8470c29b3359b346984b"
+dependencies = [
+ "cfg-if",
+]
 
 [[package]]
-name = "remove_dir_all"
-version = "0.5.3"
+name = "crypto-common"
+version = "0.1.6"
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-checksum = "3acd125665422973a33ac9d3dd2df85edad0f4ae9b00dafb1a05e43a9f5ef8e7"
+checksum = "1bfb12502f3fc46cca1bb51ac28df9d618d813cdc3d2f25b9fe775a34af26bb3"
 dependencies = [
- "winapi",
+ "generic-array",
+ "typenum",
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 [[package]]
-name = "ryu"
-version = "1.0.11"
+name = "dashmap"
+version = "5.4.0"
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-checksum = "4501abdff3ae82a1c1b477a17252eb69cee9e66eb915c1abaa4f44d873df9f09"
+checksum = "907076dfda823b0b36d2a1bb5f90c96660a5bbcd7729e10727f07858f22c4edc"
+dependencies = [
+ "cfg-if",
+ "hashbrown 0.12.3",
+ "lock_api",
+ "once_cell",
+ "parking_lot_core",
+]
 
 [[package]]
-name = "serde"
-version = "1.0.144"
+name = "debugid"
+version = "0.8.0"
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-checksum = "0f747710de3dcd43b88c9168773254e809d8ddbdf9653b84e2554ab219f17860"
+checksum = "bef552e6f588e446098f6ba40d89ac146c8c7b64aade83c051ee00bb5d2bc18d"
 dependencies = [
- "serde_derive",
+ "uuid",
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 [[package]]
-name = "serde_derive"
-version = "1.0.144"
+name = "digest"
+version = "0.10.7"
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-checksum = "94ed3a816fb1d101812f83e789f888322c34e291f894f19590dc310963e87a00"
+checksum = "9ed9a281f7bc9b7576e61468ba615a66a5c8cfdff42420a70aa82701a3b1e292"
 dependencies = [
- "proc-macro2",
- "quote",
- "syn",
+ "block-buffer",
+ "crypto-common",
 ]
 
 [[package]]
-name = "serde_json"
-version = "1.0.85"
+name = "directories-next"
+version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
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+ "syn 1.0.99",
+]
+
+[[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 = "toml"
+version = "0.5.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f4f7f0dd8d50a853a531c426359045b1998f04219d88799810762cd4ad314234"
+dependencies = [
+ "serde",
+]
+
+[[package]]
+name = "typenum"
+version = "1.16.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "497961ef93d974e23eb6f433eb5fe1b7930b659f06d12dec6fc44a8f554c0bba"
+
+[[package]]
+name = "unicase"
+version = "2.6.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50f37be617794602aabbeee0be4f259dc1778fabe05e2d67ee8f79326d5cb4f6"
+dependencies = [
+ "version_check",
 ]
 
+[[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 = "1.0.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c4f5b37a154999a8f3f98cc23a628d850e154479cd94decf3414696e12e31aaf"
 
+[[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"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1dd624098567895118886609431a7c3b8f516e41d30e0643f03d94592a147e36"
+
+[[package]]
+name = "unicode-width"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c0edd1e5b14653f783770bce4a4dabb4a5108a5370a5f5d8cfe8710c361f6c8b"
+
+[[package]]
+name = "unicode-xid"
+version = "0.2.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f962df74c8c05a667b5ee8bcf162993134c104e96440b663c8daa176dc772d8c"
+
+[[package]]
+name = "url"
+version = "2.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "50bff7831e19200a85b17131d085c25d7811bc4e186efdaf54bbd132994a88cb"
+dependencies = [
+ "form_urlencoded",
+ "idna",
+ "percent-encoding",
+]
+
+[[package]]
+name = "uuid"
+version = "1.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "345444e32442451b267fc254ae85a209c64be56d2890e601a0c37ff0c3c5ecd2"
+
+[[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 = "0.9.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "49874b5167b65d7193b8aba1567f5c7d93d001cafc34600cee003eda787e483f"
 
+[[package]]
+name = "wasi"
+version = "0.9.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
+
 [[package]]
 name = "wasi"
 version = "0.11.0+wasi-snapshot-preview1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9c8d87e72b64a3b4db28d11ce29237c246188f4f51057d65a7eab63b7987e423"
 
+[[package]]
+name = "wasm-encoder"
+version = "0.29.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "18c41dbd92eaebf3612a39be316540b8377c871cb9bde6b064af962984912881"
+dependencies = [
+ "leb128",
+]
+
 [[package]]
 name = "wasm-shim"
 version = "0.1.0"
@@ -420,12 +1702,296 @@ dependencies = [
  "protobuf",
  "protoc-rust",
  "proxy-wasm",
+ "proxy-wasm-test-framework",
  "radix_trie",
  "regex",
  "serde",
  "serde_json",
  "serde_regex",
+ "serial_test",
+ "thiserror",
+]
+
+[[package]]
+name = "wasmparser"
+version = "0.103.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2c437373cac5ea84f1113d648d51f71751ffbe3d90c00ae67618cf20d0b5ee7b"
+dependencies = [
+ "indexmap",
+ "url",
+]
+
+[[package]]
+name = "wasmtime"
+version = "9.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "aa0f72886c3264eb639f50188d1eb98b975564130292fea8deb4facf91ca7258"
+dependencies = [
+ "anyhow",
+ "async-trait",
+ "bincode",
+ "bumpalo",
+ "cfg-if",
+ "fxprof-processed-profile",
+ "indexmap",
+ "libc",
+ "log",
+ "object",
+ "once_cell",
+ "paste",
+ "psm",
+ "rayon",
+ "serde",
+ "serde_json",
+ "target-lexicon",
+ "wasmparser",
+ "wasmtime-cache",
+ "wasmtime-component-macro",
+ "wasmtime-cranelift",
+ "wasmtime-environ",
+ "wasmtime-fiber",
+ "wasmtime-jit",
+ "wasmtime-runtime",
+ "wat",
+ "windows-sys",
+]
+
+[[package]]
+name = "wasmtime-asm-macros"
+version = "9.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a18391ed41ca957eecdbe64c51879b75419cbc52e2d8663fe82945b28b4f19da"
+dependencies = [
+ "cfg-if",
+]
+
+[[package]]
+name = "wasmtime-cache"
+version = "9.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "dfd5ef82889a6a35b3790025b3fd33e6ee4902a5408c09f716c771a38c47cd10"
+dependencies = [
+ "anyhow",
+ "base64",
+ "bincode",
+ "directories-next",
+ "file-per-thread-logger",
+ "log",
+ "rustix",
+ "serde",
+ "sha2",
+ "toml",
+ "windows-sys",
+ "zstd",
+]
+
+[[package]]
+name = "wasmtime-component-macro"
+version = "9.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b31baf908d484e93b18fd31f47af5072aa812d3af5ee4d8323295b48240a9ada"
+dependencies = [
+ "anyhow",
+ "proc-macro2",
+ "quote",
+ "syn 1.0.99",
+ "wasmtime-component-util",
+ "wasmtime-wit-bindgen",
+ "wit-parser",
+]
+
+[[package]]
+name = "wasmtime-component-util"
+version = "9.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "daff76cac73c9a1bd0bc201d5304e20dc0724b2c34c029b0c91e10e44c1f47a1"
+
+[[package]]
+name = "wasmtime-cranelift"
+version = "9.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a2495036d05eb1e79ecf22e092eeacd279dcf24b4fcab77fb4cf8ef9bd42c3ea"
+dependencies = [
+ "anyhow",
+ "cranelift-codegen",
+ "cranelift-control",
+ "cranelift-entity",
+ "cranelift-frontend",
+ "cranelift-native",
+ "cranelift-wasm",
+ "gimli",
+ "log",
+ "object",
+ "target-lexicon",
+ "thiserror",
+ "wasmparser",
+ "wasmtime-cranelift-shared",
+ "wasmtime-environ",
+]
+
+[[package]]
+name = "wasmtime-cranelift-shared"
+version = "9.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ef677f7b0d3f3b73275675486d791f1e85e7c24afe8dd367c6b9950028906330"
+dependencies = [
+ "anyhow",
+ "cranelift-codegen",
+ "cranelift-control",
+ "cranelift-native",
+ "gimli",
+ "object",
+ "target-lexicon",
+ "wasmtime-environ",
+]
+
+[[package]]
+name = "wasmtime-environ"
+version = "9.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2d03356374ffafa881c5f972529d2bb11ce48fe2736285e2b0ad72c6d554257b"
+dependencies = [
+ "anyhow",
+ "cranelift-entity",
+ "gimli",
+ "indexmap",
+ "log",
+ "object",
+ "serde",
+ "target-lexicon",
+ "thiserror",
+ "wasmparser",
+ "wasmtime-types",
+]
+
+[[package]]
+name = "wasmtime-fiber"
+version = "9.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3ecb992732d5fc99c14e3752f6b9110ec5ace88da15d843f2b80f2b789b182ea"
+dependencies = [
+ "cc",
+ "cfg-if",
+ "rustix",
+ "wasmtime-asm-macros",
+ "windows-sys",
+]
+
+[[package]]
+name = "wasmtime-jit"
+version = "9.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e5374f0d2ee0069391dd9348f148802846b2b3e0af650385f9c56b3012d3c5d1"
+dependencies = [
+ "addr2line",
+ "anyhow",
+ "bincode",
+ "cfg-if",
+ "cpp_demangle",
+ "gimli",
+ "ittapi",
+ "log",
+ "object",
+ "rustc-demangle",
+ "serde",
+ "target-lexicon",
+ "wasmtime-environ",
+ "wasmtime-jit-debug",
+ "wasmtime-jit-icache-coherence",
+ "wasmtime-runtime",
+ "windows-sys",
+]
+
+[[package]]
+name = "wasmtime-jit-debug"
+version = "9.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "102653b177225bfdd2da41cc385965d4bf6bc10cf14ec7b306bc9b015fb01c22"
+dependencies = [
+ "object",
+ "once_cell",
+ "rustix",
+]
+
+[[package]]
+name = "wasmtime-jit-icache-coherence"
+version = "9.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "374ff63b3eb41db57c56682a9ef7737d2c9efa801f5dbf9da93941c9dd436a06"
+dependencies = [
+ "cfg-if",
+ "libc",
+ "windows-sys",
+]
+
+[[package]]
+name = "wasmtime-runtime"
+version = "9.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9b1b832f19099066ebd26e683121d331f12cf98f158eac0f889972854413b46f"
+dependencies = [
+ "anyhow",
+ "cc",
+ "cfg-if",
+ "indexmap",
+ "libc",
+ "log",
+ "mach",
+ "memfd",
+ "memoffset",
+ "paste",
+ "rand 0.8.5",
+ "rustix",
+ "wasmtime-asm-macros",
+ "wasmtime-environ",
+ "wasmtime-fiber",
+ "wasmtime-jit-debug",
+ "windows-sys",
+]
+
+[[package]]
+name = "wasmtime-types"
+version = "9.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "9c574221440e05bbb04efa09786d049401be2eb10081ecf43eb72fbd637bd12f"
+dependencies = [
+ "cranelift-entity",
+ "serde",
  "thiserror",
+ "wasmparser",
+]
+
+[[package]]
+name = "wasmtime-wit-bindgen"
+version = "9.0.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5afee5e7c290e9b32280160226dadbb5e1a4d6ba7c9b79f440b70cc790aabc1e"
+dependencies = [
+ "anyhow",
+ "heck 0.4.1",
+ "wit-parser",
+]
+
+[[package]]
+name = "wast"
+version = "60.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bd06cc744b536e30387e72a48fdd492105b9c938bb4f415c39c616a7a0a697ad"
+dependencies = [
+ "leb128",
+ "memchr",
+ "unicode-width",
+ "wasm-encoder",
+]
+
+[[package]]
+name = "wat"
+version = "1.0.66"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5abe520f0ab205366e9ac7d3e6b2fc71de44e32a2b58f2ec871b6b575bdcea3b"
+dependencies = [
+ "wast",
 ]
 
 [[package]]
@@ -455,8 +2021,128 @@ 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"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+
+[[package]]
+name = "windows-sys"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
+dependencies = [
+ "windows-targets",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7b1eb6f0cd7c80c79759c929114ef071b87354ce476d9d94271031c0497adfd5"
+dependencies = [
+ "windows_aarch64_gnullvm",
+ "windows_aarch64_msvc",
+ "windows_i686_gnu",
+ "windows_i686_msvc",
+ "windows_x86_64_gnu",
+ "windows_x86_64_gnullvm",
+ "windows_x86_64_msvc",
+]
+
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "91ae572e1b79dba883e0d315474df7305d12f569b400fcf90581b06062f7e1bc"
+
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b2ef27e0d7bdfcfc7b868b317c1d32c641a6fe4629c171b8928c7b08d98d7cf3"
+
+[[package]]
+name = "windows_i686_gnu"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "622a1962a7db830d6fd0a69683c80a18fda201879f0f447f065a3b7467daa241"
+
+[[package]]
+name = "windows_i686_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4542c6e364ce21bf45d69fdd2a8e455fa38d316158cfd43b3ac1c5b1b19f8e00"
+
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ca2b8a661f7628cbd23440e50b05d705db3686f894fc9580820623656af974b1"
+
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7896dbc1f41e08872e9d5e8f8baa8fdd2677f29468c4e156210174edc7f7b953"
+
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.48.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1a515f5799fe4961cb532f983ce2b23082366b898e52ffbce459c86f67c8378a"
+
+[[package]]
+name = "wit-parser"
+version = "0.7.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5ca2581061573ef6d1754983d7a9b3ed5871ef859d52708ea9a0f5af32919172"
+dependencies = [
+ "anyhow",
+ "id-arena",
+ "indexmap",
+ "log",
+ "pulldown-cmark",
+ "unicode-xid",
+ "url",
+]
+
+[[package]]
+name = "zstd"
+version = "0.11.2+zstd.1.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "20cc960326ece64f010d2d2107537f26dc589a6573a316bd5b1dba685fa5fde4"
+dependencies = [
+ "zstd-safe",
+]
+
+[[package]]
+name = "zstd-safe"
+version = "5.0.2+zstd.1.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1d2a5585e04f9eea4b2a3d1eca508c4dee9592a89ef6f450c11719da0726f4db"
+dependencies = [
+ "libc",
+ "zstd-sys",
+]
+
+[[package]]
+name = "zstd-sys"
+version = "2.0.8+zstd.1.5.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5556e6ee25d32df2586c098bbfa278803692a20d0ab9565e049480d52707ec8c"
+dependencies = [
+ "cc",
+ "libc",
+ "pkg-config",
+]
diff --git a/Cargo.toml b/Cargo.toml
index ca77b35..fe1be27 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -26,5 +26,9 @@ regex = "1"
 serde_regex = "1.1.0"
 radix_trie = "0.2.1"
 
+[dev-dependencies]
+proxy-wasm-test-framework = { git = "https://github.com/Kuadrant/wasm-test-framework.git", branch = "kuadrant" }
+serial_test = "2.0.0"
+
 [build-dependencies]
 protoc-rust = "2.27"
diff --git a/Dockerfile b/Dockerfile
index c6d9981..16efc07 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,7 +4,7 @@
 
 FROM alpine:3.16 as wasm-shim-build
 
-ARG RUSTC_VERSION=1.58.1
+ARG RUSTC_VERSION=1.69.0
 RUN apk update \
     && apk upgrade \
     && apk add build-base binutils-gold openssl3-dev protoc curl \
diff --git a/src/envoy/mod.rs b/src/envoy/mod.rs
index 4377652..7be7ea5 100644
--- a/src/envoy/mod.rs
+++ b/src/envoy/mod.rs
@@ -39,6 +39,7 @@ pub use {
         AttributeContext, AttributeContext_HttpRequest, AttributeContext_Peer,
         AttributeContext_Request,
     },
+    base::HeaderValue,
     base::Metadata,
     external_auth::{CheckRequest, CheckResponse},
     ratelimit::{RateLimitDescriptor, RateLimitDescriptor_Entry},
diff --git a/src/lib.rs b/src/lib.rs
index b949b4b..f9cfa6c 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -4,3 +4,33 @@ mod filter;
 mod glob;
 mod policy_index;
 mod utils;
+
+#[cfg(test)]
+mod tests {
+    use crate::envoy::{HeaderValue, RateLimitResponse, RateLimitResponse_Code};
+    use protobuf::Message;
+
+    #[test]
+    fn grpc() {
+        let mut resp = RateLimitResponse::new();
+        resp.overall_code = RateLimitResponse_Code::OK;
+        resp.response_headers_to_add
+            .push(header("test", "some value"));
+        resp.response_headers_to_add
+            .push(header("other", "header value"));
+        let buffer = resp.write_to_bytes().unwrap();
+        let expected: [u8; 45] = [
+            8, 1, 26, 18, 10, 4, 116, 101, 115, 116, 18, 10, 115, 111, 109, 101, 32, 118, 97, 108,
+            117, 101, 26, 21, 10, 5, 111, 116, 104, 101, 114, 18, 12, 104, 101, 97, 100, 101, 114,
+            32, 118, 97, 108, 117, 101,
+        ];
+        assert_eq!(expected, buffer.as_slice())
+    }
+
+    fn header(key: &str, value: &str) -> HeaderValue {
+        let mut header = HeaderValue::new();
+        header.key = key.to_string();
+        header.value = value.to_string();
+        header
+    }
+}
diff --git a/tests/rate_limited.rs b/tests/rate_limited.rs
new file mode 100644
index 0000000..2d340e9
--- /dev/null
+++ b/tests/rate_limited.rs
@@ -0,0 +1,325 @@
+use proxy_wasm_test_framework::tester;
+use proxy_wasm_test_framework::types::{Action, BufferType, LogLevel, MapType, ReturnType};
+use serial_test::serial;
+use std::path::Path;
+
+fn wasm_module() -> String {
+    let wasm_file = Path::new("target/wasm32-unknown-unknown/release/wasm_shim.wasm");
+    assert!(
+        wasm_file.exists(),
+        "Run `cargo build --release --target=wasm32-unknown-unknown` first"
+    );
+    wasm_file.to_str().unwrap().to_string()
+}
+
+#[test]
+#[serial]
+fn it_loads() {
+    let args = tester::MockSettings {
+        wasm_path: wasm_module(),
+        quiet: false,
+        allow_unexpected: false,
+    };
+    let mut module = tester::mock(args).unwrap();
+
+    module
+        .call_start()
+        .execute_and_expect(ReturnType::None)
+        .unwrap();
+
+    let root_context = 1;
+    let cfg = r#"{
+        "failure_mode_deny": true,
+        "rate_limit_policies": []
+    }"#;
+
+    module
+        .call_proxy_on_context_create(root_context, 0)
+        .expect_log(Some(LogLevel::Info), Some("set_root_context #1"))
+        .execute_and_expect(ReturnType::None)
+        .unwrap();
+    module
+        .call_proxy_on_configure(root_context, 0)
+        .expect_log(Some(LogLevel::Info), Some("on_configure #1"))
+        .expect_get_buffer_bytes(Some(BufferType::PluginConfiguration))
+        .returning(Some(cfg.as_bytes()))
+        .expect_log(Some(LogLevel::Info), None)
+        .execute_and_expect(ReturnType::Bool(true))
+        .unwrap();
+
+    let http_context = 2;
+    module
+        .call_proxy_on_context_create(http_context, root_context)
+        .expect_log(Some(LogLevel::Info), Some("create_http_context #2"))
+        .execute_and_expect(ReturnType::None)
+        .unwrap();
+
+    module
+        .call_proxy_on_request_headers(http_context, 0, false)
+        .expect_log(Some(LogLevel::Info), Some("on_http_request_headers #2"))
+        .expect_get_header_map_value(Some(MapType::HttpRequestHeaders), Some(":authority"))
+        .returning(Some("cars.toystore.com"))
+        .expect_log(
+            Some(LogLevel::Info),
+            Some("context #2: Allowing request to pass because zero descriptors generated"),
+        )
+        .execute_and_expect(ReturnType::Action(Action::Continue))
+        .unwrap();
+
+    module
+        .call_proxy_on_response_headers(http_context, 0, false)
+        .execute_and_expect(ReturnType::Action(Action::Continue))
+        .unwrap();
+}
+
+#[test]
+#[serial]
+fn it_limits() {
+    let args = tester::MockSettings {
+        wasm_path: wasm_module(),
+        quiet: false,
+        allow_unexpected: false,
+    };
+    let mut module = tester::mock(args).unwrap();
+
+    module
+        .call_start()
+        .execute_and_expect(ReturnType::None)
+        .unwrap();
+
+    let root_context = 1;
+    let cfg = r#"{
+        "failure_mode_deny": true,
+        "rate_limit_policies": [
+                {
+            "name": "some-name",
+            "rate_limit_domain": "RLS-domain",
+            "upstream_cluster": "limitador-cluster",
+            "hostnames": ["*.toystore.com", "example.com"],
+            "gateway_actions": [
+            {
+                "rules": [
+                {
+                    "paths": ["/admin/toy"],
+                    "hosts": ["cars.toystore.com"],
+                    "methods": ["POST"]
+                }],
+                "configurations": [
+                {
+                    "actions": [
+                    {
+                        "generic_key": {
+                            "descriptor_key": "admin",
+                            "descriptor_value": "1"
+                        }
+                    }
+                    ]
+                }
+                ]
+            }
+            ]
+        }
+        ]
+    }"#;
+
+    module
+        .call_proxy_on_context_create(root_context, 0)
+        .expect_log(Some(LogLevel::Info), Some("set_root_context #1"))
+        .execute_and_expect(ReturnType::None)
+        .unwrap();
+    module
+        .call_proxy_on_configure(root_context, 0)
+        .expect_log(Some(LogLevel::Info), Some("on_configure #1"))
+        .expect_get_buffer_bytes(Some(BufferType::PluginConfiguration))
+        .returning(Some(cfg.as_bytes()))
+        .expect_log(Some(LogLevel::Info), None)
+        .execute_and_expect(ReturnType::Bool(true))
+        .unwrap();
+
+    let http_context = 2;
+    module
+        .call_proxy_on_context_create(http_context, root_context)
+        .expect_log(Some(LogLevel::Info), Some("create_http_context #2"))
+        .execute_and_expect(ReturnType::None)
+        .unwrap();
+
+    module
+        .call_proxy_on_request_headers(http_context, 0, false)
+        .expect_log(Some(LogLevel::Info), Some("on_http_request_headers #2"))
+        .expect_get_header_map_value(Some(MapType::HttpRequestHeaders), Some(":authority"))
+        .returning(Some("cars.toystore.com"))
+        .expect_get_header_map_value(Some(MapType::HttpRequestHeaders), Some(":path"))
+        .returning(Some("/admin/toy"))
+        .expect_get_header_map_value(Some(MapType::HttpRequestHeaders), Some(":method"))
+        .returning(Some("POST"))
+        .expect_get_header_map_value(Some(MapType::HttpRequestHeaders), Some(":authority"))
+        .returning(Some("cars.toystore.com"))
+        .expect_grpc_call(
+            Some("limitador-cluster"),
+            Some("envoy.service.ratelimit.v3.RateLimitService"),
+            Some("ShouldRateLimit"),
+            Some(&[0, 0, 0, 0]),
+            Some(&[
+                10, 10, 82, 76, 83, 45, 100, 111, 109, 97, 105, 110, 18, 12, 10, 10, 10, 5, 97,
+                100, 109, 105, 110, 18, 1, 49, 24, 1,
+            ]),
+            Some(5000),
+        )
+        .returning(Some(42))
+        .expect_log(
+            Some(LogLevel::Info),
+            Some("Initiated gRPC call (id# 42) to Limitador"),
+        )
+        .execute_and_expect(ReturnType::Action(Action::Pause))
+        .unwrap();
+
+    let grpc_response: [u8; 2] = [8, 1];
+    module
+        .call_proxy_on_grpc_receive(http_context, 42, grpc_response.len() as i32)
+        .expect_log(
+            Some(LogLevel::Info),
+            Some("received gRPC call response: token: 42, status: 0"),
+        )
+        .expect_get_buffer_bytes(Some(BufferType::GrpcReceiveBuffer))
+        .returning(Some(&grpc_response))
+        .execute_and_expect(ReturnType::None)
+        .unwrap();
+
+    module
+        .call_proxy_on_response_headers(http_context, 0, false)
+        .execute_and_expect(ReturnType::Action(Action::Continue))
+        .unwrap();
+}
+
+#[test]
+#[serial]
+fn it_passes_additional_headers() {
+    let args = tester::MockSettings {
+        wasm_path: wasm_module(),
+        quiet: false,
+        allow_unexpected: false,
+    };
+    let mut module = tester::mock(args).unwrap();
+
+    module
+        .call_start()
+        .execute_and_expect(ReturnType::None)
+        .unwrap();
+
+    let root_context = 1;
+    let cfg = r#"{
+        "failure_mode_deny": true,
+        "rate_limit_policies": [
+                {
+            "name": "some-name",
+            "rate_limit_domain": "RLS-domain",
+            "upstream_cluster": "limitador-cluster",
+            "hostnames": ["*.toystore.com", "example.com"],
+            "gateway_actions": [
+            {
+                "rules": [
+                {
+                    "paths": ["/admin/toy"],
+                    "hosts": ["cars.toystore.com"],
+                    "methods": ["POST"]
+                }],
+                "configurations": [
+                {
+                    "actions": [
+                    {
+                        "generic_key": {
+                            "descriptor_key": "admin",
+                            "descriptor_value": "1"
+                        }
+                    }
+                    ]
+                }
+                ]
+            }
+            ]
+        }
+        ]
+    }"#;
+
+    module
+        .call_proxy_on_context_create(root_context, 0)
+        .expect_log(Some(LogLevel::Info), Some("set_root_context #1"))
+        .execute_and_expect(ReturnType::None)
+        .unwrap();
+    module
+        .call_proxy_on_configure(root_context, 0)
+        .expect_log(Some(LogLevel::Info), Some("on_configure #1"))
+        .expect_get_buffer_bytes(Some(BufferType::PluginConfiguration))
+        .returning(Some(cfg.as_bytes()))
+        .expect_log(Some(LogLevel::Info), None)
+        .execute_and_expect(ReturnType::Bool(true))
+        .unwrap();
+
+    let http_context = 2;
+    module
+        .call_proxy_on_context_create(http_context, root_context)
+        .expect_log(Some(LogLevel::Info), Some("create_http_context #2"))
+        .execute_and_expect(ReturnType::None)
+        .unwrap();
+
+    module
+        .call_proxy_on_request_headers(http_context, 0, false)
+        .expect_log(Some(LogLevel::Info), Some("on_http_request_headers #2"))
+        .expect_get_header_map_value(Some(MapType::HttpRequestHeaders), Some(":authority"))
+        .returning(Some("cars.toystore.com"))
+        .expect_get_header_map_value(Some(MapType::HttpRequestHeaders), Some(":path"))
+        .returning(Some("/admin/toy"))
+        .expect_get_header_map_value(Some(MapType::HttpRequestHeaders), Some(":method"))
+        .returning(Some("POST"))
+        .expect_get_header_map_value(Some(MapType::HttpRequestHeaders), Some(":authority"))
+        .returning(Some("cars.toystore.com"))
+        .expect_grpc_call(
+            Some("limitador-cluster"),
+            Some("envoy.service.ratelimit.v3.RateLimitService"),
+            Some("ShouldRateLimit"),
+            Some(&[0, 0, 0, 0]),
+            Some(&[
+                10, 10, 82, 76, 83, 45, 100, 111, 109, 97, 105, 110, 18, 12, 10, 10, 10, 5, 97,
+                100, 109, 105, 110, 18, 1, 49, 24, 1,
+            ]),
+            Some(5000),
+        )
+        .returning(Some(42))
+        .expect_log(
+            Some(LogLevel::Info),
+            Some("Initiated gRPC call (id# 42) to Limitador"),
+        )
+        .execute_and_expect(ReturnType::Action(Action::Pause))
+        .unwrap();
+
+    let grpc_response: [u8; 45] = [
+        8, 1, 26, 18, 10, 4, 116, 101, 115, 116, 18, 10, 115, 111, 109, 101, 32, 118, 97, 108, 117,
+        101, 26, 21, 10, 5, 111, 116, 104, 101, 114, 18, 12, 104, 101, 97, 100, 101, 114, 32, 118,
+        97, 108, 117, 101,
+    ];
+    module
+        .call_proxy_on_grpc_receive(http_context, 42, grpc_response.len() as i32)
+        .expect_log(
+            Some(LogLevel::Info),
+            Some("received gRPC call response: token: 42, status: 0"),
+        )
+        .expect_get_buffer_bytes(Some(BufferType::GrpcReceiveBuffer))
+        .returning(Some(&grpc_response))
+        .execute_and_expect(ReturnType::None)
+        .unwrap();
+
+    module
+        .call_proxy_on_response_headers(http_context, 0, false)
+        .expect_add_header_map_value(
+            Some(MapType::HttpResponseHeaders),
+            Some("test"),
+            Some("some value"),
+        )
+        .expect_add_header_map_value(
+            Some(MapType::HttpResponseHeaders),
+            Some("other"),
+            Some("header value"),
+        )
+        .execute_and_expect(ReturnType::Action(Action::Continue))
+        .unwrap();
+}