diff --git a/.github/workflows/unit_tests.yml b/.github/workflows/unit_tests.yml
index 045fb8c..33ec0fd 100644
--- a/.github/workflows/unit_tests.yml
+++ b/.github/workflows/unit_tests.yml
@@ -22,9 +22,6 @@ jobs:
       - name: Checkout source code
         uses: actions/checkout@v3
 
-      - name: Install Rust toolchain
-        uses: Cardinal-Cryptography/github-actions/install-rust-toolchain@v1
-
       - name: Run cargo fmt
         uses: actions-rs/cargo@v1
         with:
@@ -38,9 +35,7 @@ jobs:
           args: --all-targets -- --no-deps -D warnings
 
       - name: Run unit tests
-        uses: actions-rs/cargo@v1
-        with:
-          command: test
+        run: make test
 
   build:
     name: Build the contract
@@ -50,23 +45,5 @@ jobs:
       - name: Checkout source code
         uses: actions/checkout@v3
 
-      - name: Cache Crates
-        uses: actions/cache@v3
-        with:
-          path: ~/.cargo
-          key: ${{ runner.os }}-contract-build-env-${{ hashFiles('rust-toolchain.toml') }}
-
-      - name: Install Rust toolchain
-        uses: Cardinal-Cryptography/github-actions/install-rust-toolchain@v1
-
-      - name: Install cargo contract
-        uses: actions-rs/cargo@v1
-        with:
-          command: install
-          args: --locked cargo-contract
-
       - name: Build contract
-        uses: actions-rs/cargo@v1
-        with:
-          command: contract
-          args: build --release
+        run: make build
diff --git a/Cargo.lock b/Cargo.lock
index 8d70240..fd75b89 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -4,9 +4,9 @@ version = 3
 
 [[package]]
 name = "aho-corasick"
-version = "1.1.2"
+version = "1.1.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b2969dcb958b36655471fc61f7e416fa76033bdd4bfed0678d8fee1e2d07a1f0"
+checksum = "8e60d3430d3a69478ad0993f19238d2df97c507009a52b3c10addcd7f6bcb916"
 dependencies = [
  "memchr",
 ]
@@ -31,15 +31,9 @@ checksum = "96d30a06541fbafbc7f82ed10c06164cfbd2c401138f6addd8404629c4b16711"
 
 [[package]]
 name = "autocfg"
-version = "1.1.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
-
-[[package]]
-name = "bitflags"
-version = "2.4.1"
+version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "327762f6e5a765692301e5bb513e0d9fef63be86bbc14528052b1cd3e6f03e07"
+checksum = "f1fdabc7756949593fe60f30ec81974b613357de856987752631dea1e3394c80"
 
 [[package]]
 name = "bitvec"
@@ -79,12 +73,9 @@ checksum = "c3ac9f8b63eca6fd385229b3675f6cc0dc5c8a5c8a54a59d4f52ffd670d87b0c"
 
 [[package]]
 name = "cc"
-version = "1.0.83"
+version = "1.0.90"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f1174fb0b6ec23863f8b971027804a42614e347eafb0a95bf0b12cdae21fc4d0"
-dependencies = [
- "libc",
-]
+checksum = "8cd6604a82acf3039f1144f54b8eb34e91ffba622051189e71b781822d5ee1f5"
 
 [[package]]
 name = "cfg-if"
@@ -94,9 +85,9 @@ checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
 
 [[package]]
 name = "cpufeatures"
-version = "0.2.11"
+version = "0.2.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ce420fe07aecd3e67c5f910618fe65e94158f6dcc0adf44e00d69ce2bdfe0fd0"
+checksum = "53fe5e26ff1b7aef8bca9c6080520cfb8d9333c7568e1829cef191a9723e5504"
 dependencies = [
  "libc",
 ]
@@ -170,15 +161,15 @@ dependencies = [
 
 [[package]]
 name = "either"
-version = "1.9.0"
+version = "1.10.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a26ae43d7bcc3b814de94796a5e736d4029efb0ee900c12e2d54c993ad1a1e07"
+checksum = "11157ac094ffbdde99aa67b23417ebdd801842852b500e395a45a9c0aac03e4a"
 
 [[package]]
 name = "env_logger"
-version = "0.10.0"
+version = "0.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "85cdab6a89accf66733ad5a1693a4dcced6aeff64602b634530dd73c1f3ee9f0"
+checksum = "4cd405aab171cb85d6735e5c8d9db038c17d3ca007a4d2c25f337935c3d90580"
 dependencies = [
  "humantime",
  "is-terminal",
@@ -193,16 +184,6 @@ version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5443807d6dff69373d433ab9ef5378ad8df50ca6298caf15de6e52e24aaf54d5"
 
-[[package]]
-name = "errno"
-version = "0.3.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7c18ee0ed65a5f1f81cac6b1d213b69c35fa47d4252ad41f1486dbd8226fe36e"
-dependencies = [
- "libc",
- "windows-sys",
-]
-
 [[package]]
 name = "fnv"
 version = "1.0.7"
@@ -227,9 +208,9 @@ dependencies = [
 
 [[package]]
 name = "hashbrown"
-version = "0.14.2"
+version = "0.14.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f93e7192158dbcda357bdec5fb5788eebf8bbac027f3f33e719d29135ae84156"
+checksum = "290f1a1d9242c78d09ce40a5e87e7554ee637af1351968159f4952f028f75604"
 
 [[package]]
 name = "heck"
@@ -239,9 +220,9 @@ checksum = "95505c38b4572b2d910cecb0281560f54b440a19336cbbcb27bf6ce6adc6f5a8"
 
 [[package]]
 name = "hermit-abi"
-version = "0.3.3"
+version = "0.3.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d77f7ec81a6d05a3abb01ab6eb7590f6083d08449fe5a1c8b1e620283546ccb7"
+checksum = "d231dfb89cfffdbc30e7fc41579ed6066ad03abda9e567ccafae602b97ec5024"
 
 [[package]]
 name = "humantime"
@@ -277,9 +258,9 @@ dependencies = [
 
 [[package]]
 name = "indexmap"
-version = "2.1.0"
+version = "2.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d530e1a18b1cb4c484e6e34556a0d948706958449fca0cab753d649f2bce3d1f"
+checksum = "168fb715dda47215e360912c096649d23d58bf392ac62f73919e831745e40f26"
 dependencies = [
  "equivalent",
  "hashbrown",
@@ -331,7 +312,7 @@ dependencies = [
  "quote",
  "serde",
  "serde_json",
- "syn 2.0.39",
+ "syn 2.0.55",
 ]
 
 [[package]]
@@ -388,7 +369,7 @@ dependencies = [
  "itertools",
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.55",
 ]
 
 [[package]]
@@ -403,7 +384,7 @@ dependencies = [
  "parity-scale-codec",
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.55",
  "synstructure",
 ]
 
@@ -478,12 +459,12 @@ dependencies = [
 
 [[package]]
 name = "is-terminal"
-version = "0.4.9"
+version = "0.4.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cb0889898416213fab133e1d33a0e5858a48177452750691bde3666d0fdbaf8b"
+checksum = "f23ff5ef2b80d608d61efee834934d862cd92461afc0560dedf493e4c033738b"
 dependencies = [
  "hermit-abi",
- "rustix",
+ "libc",
  "windows-sys",
 ]
 
@@ -498,63 +479,57 @@ dependencies = [
 
 [[package]]
 name = "itoa"
-version = "1.0.9"
+version = "1.0.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "af150ab688ff2122fcef229be89cb50dd66af9e01a4ff320cc137eecc9bacc38"
+checksum = "49f1f14873335454500d59611f1cf4a4b0f786f9ac11f4312a78e4cf2566695b"
 
 [[package]]
 name = "keccak"
-version = "0.1.4"
+version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f6d5ed8676d904364de097082f4e7d240b571b67989ced0240f08b7f966f940"
+checksum = "ecc2af9a1119c51f12a14607e783cb977bde58bc069ff0c3da1095e635d70654"
 dependencies = [
  "cpufeatures",
 ]
 
 [[package]]
 name = "libc"
-version = "0.2.150"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "89d92a4743f9a61002fae18374ed11e7973f530cb3a3255fb354818118b2203c"
-
-[[package]]
-name = "linux-raw-sys"
-version = "0.4.11"
+version = "0.2.153"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "969488b55f8ac402214f3f5fd243ebb7206cf82de60d3172994707a4bcc2b829"
+checksum = "9c198f91728a82281a64e1f4f9eeb25d82cb32a5de251c6bd1b5154d63a8e7bd"
 
 [[package]]
 name = "log"
-version = "0.4.20"
+version = "0.4.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b5e6163cb8c49088c2c36f57875e58ccd8c87c7427f7fbd50ea6710b2f3f2e8f"
+checksum = "90ed8c1e510134f979dbc4f070f87d4313098b704861a105fe34231c70a3901c"
 
 [[package]]
 name = "memchr"
-version = "2.6.4"
+version = "2.7.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f665ee40bc4a3c5590afb1e9677db74a508659dfd71e126420da8274909a0167"
+checksum = "6c8640c5d730cb13ebd907d8d04b52f55ac9a2eec55b440c8892f40d56c76c1d"
 
 [[package]]
 name = "num-traits"
-version = "0.2.17"
+version = "0.2.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "39e3200413f237f41ab11ad6d161bc7239c84dcb631773ccd7de3dfe4b5c267c"
+checksum = "da0df0e5185db44f69b44f26786fe401b6c293d1907744beaa7fa62b2e5a517a"
 dependencies = [
  "autocfg",
 ]
 
 [[package]]
 name = "once_cell"
-version = "1.18.0"
+version = "1.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dd8b5dd2ae5ed71462c540258bedcb51965123ad7e7ccf4b9a8cafaa4a63576d"
+checksum = "3fdb12b2476b595f9358c5161aa467c2438859caa136dec86c26fdd2efe17b92"
 
 [[package]]
 name = "parity-scale-codec"
-version = "3.6.5"
+version = "3.6.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0dec8a8073036902368c2cdc0387e85ff9a37054d7e7c98e592145e0c92cd4fb"
+checksum = "881331e34fa842a2fb61cc2db9643a8fedc615e47cfcc52597d1af0db9a7e8fe"
 dependencies = [
  "arrayvec",
  "bitvec",
@@ -566,11 +541,11 @@ dependencies = [
 
 [[package]]
 name = "parity-scale-codec-derive"
-version = "3.6.5"
+version = "3.6.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "312270ee71e1cd70289dacf597cab7b207aa107d2f28191c2ae45b2ece18a260"
+checksum = "be30eaf4b0a9fba5336683b38de57bb86d179a35862ba6bfcf57625d006bde5b"
 dependencies = [
- "proc-macro-crate",
+ "proc-macro-crate 2.0.2",
  "proc-macro2",
  "quote",
  "syn 1.0.109",
@@ -589,23 +564,33 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7f4c021e1093a56626774e81216a4ce732a735e5bad4868a03f3ed65ca0c3919"
 dependencies = [
  "once_cell",
- "toml_edit",
+ "toml_edit 0.19.15",
+]
+
+[[package]]
+name = "proc-macro-crate"
+version = "2.0.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b00f26d3400549137f92511a46ac1cd8ce37cb5598a96d382381458b992a5d24"
+dependencies = [
+ "toml_datetime",
+ "toml_edit 0.20.2",
 ]
 
 [[package]]
 name = "proc-macro2"
-version = "1.0.69"
+version = "1.0.79"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "134c189feb4956b20f6f547d2cf727d4c0fe06722b20a0eec87ed445a97f92da"
+checksum = "e835ff2298f5721608eb1a980ecaee1aef2c132bf95ecc026a11b7bf3c01c02e"
 dependencies = [
  "unicode-ident",
 ]
 
 [[package]]
 name = "psp22"
-version = "0.2.0"
+version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "701aea3ff70bbecb49f4a664d25292076f13bbe5592406e2ca4bddf448c37fe0"
+checksum = "5a9bdae21c2e17b9501b2c3f8597a679cfbe2f81ec5432091bd8d4b156f66194"
 dependencies = [
  "ink",
  "parity-scale-codec",
@@ -614,9 +599,9 @@ dependencies = [
 
 [[package]]
 name = "quote"
-version = "1.0.33"
+version = "1.0.35"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5267fca4496028628a95160fc423a33e8b2e6af8a5302579e322e4b520293cae"
+checksum = "291ec9ab5efd934aaf503a6466c5d5251535d108ee747472c3977cc5acc868ef"
 dependencies = [
  "proc-macro2",
 ]
@@ -629,9 +614,9 @@ checksum = "dc33ff2d4973d518d823d61aa239014831e521c75da58e3df4840d3f47749d09"
 
 [[package]]
 name = "regex"
-version = "1.10.2"
+version = "1.10.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "380b951a9c5e80ddfd6136919eef32310721aa4aacd4889a8d39124b026ab343"
+checksum = "c117dbdfde9c8308975b6a18d71f3f385c89461f7b3fb054288ecf2a2058ba4c"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -641,9 +626,9 @@ dependencies = [
 
 [[package]]
 name = "regex-automata"
-version = "0.4.3"
+version = "0.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "5f804c7828047e88b2d32e2d7fe5a105da8ee3264f01902f796c8e067dc2483f"
+checksum = "86b83b8b9847f9bf95ef68afb0b8e6cdb80f498442f5179a29fad448fcc1eaea"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -652,9 +637,9 @@ dependencies = [
 
 [[package]]
 name = "regex-syntax"
-version = "0.8.2"
+version = "0.8.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "c08c74e62047bb2de4ff487b251e4a92e24f48745648451635cec7d591162d9f"
+checksum = "adad44e29e4c806119491a7f06f03de4d1af22c3a680dd47f1e6e179439d1f56"
 
 [[package]]
 name = "rlibc"
@@ -662,24 +647,11 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fc874b127765f014d792f16763a81245ab80500e2ad921ed4ee9e82481ee08fe"
 
-[[package]]
-name = "rustix"
-version = "0.38.21"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2b426b0506e5d50a7d8dafcf2e81471400deb602392c7dd110815afb4eaf02a3"
-dependencies = [
- "bitflags",
- "errno",
- "libc",
- "linux-raw-sys",
- "windows-sys",
-]
-
 [[package]]
 name = "ryu"
-version = "1.0.15"
+version = "1.0.17"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1ad4cc8da4ef723ed60bced201181d83791ad433213d8c24efffda1eec85d741"
+checksum = "e86697c916019a8588c99b5fac3cead74ec0b4b819707a682fd4d23fa0ce1ba1"
 
 [[package]]
 name = "scale-bits"
@@ -712,7 +684,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "27873eb6005868f8cc72dcfe109fae664cf51223d35387bc2f28be4c28d94c47"
 dependencies = [
  "darling",
- "proc-macro-crate",
+ "proc-macro-crate 1.3.1",
  "proc-macro2",
  "quote",
  "syn 1.0.109",
@@ -738,7 +710,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "995491f110efdc6bea96d6a746140e32bfceb4ea47510750a5467295a4707a25"
 dependencies = [
  "darling",
- "proc-macro-crate",
+ "proc-macro-crate 1.3.1",
  "proc-macro2",
  "quote",
  "syn 1.0.109",
@@ -746,9 +718,9 @@ dependencies = [
 
 [[package]]
 name = "scale-info"
-version = "2.10.0"
+version = "2.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "7f7d66a1128282b7ef025a8ead62a4a9fcf017382ec53b8ffbf4d7bf77bd3c60"
+checksum = "788745a868b0e751750388f4e6546eb921ef714a4317fa6954f7cde114eb2eb7"
 dependencies = [
  "bitvec",
  "cfg-if",
@@ -760,11 +732,11 @@ dependencies = [
 
 [[package]]
 name = "scale-info-derive"
-version = "2.10.0"
+version = "2.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "abf2c68b89cafb3b8d918dd07b42be0da66ff202cf1155c5739a4e0c1ea0dc19"
+checksum = "7dc2f4e8bc344b9fc3d5f74f72c2e55bfc38d28dc2ebc69c194a3df424e4d9ac"
 dependencies = [
- "proc-macro-crate",
+ "proc-macro-crate 1.3.1",
  "proc-macro2",
  "quote",
  "syn 1.0.109",
@@ -790,29 +762,29 @@ dependencies = [
 
 [[package]]
 name = "serde"
-version = "1.0.192"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bca2a08484b285dcb282d0f67b26cadc0df8b19f8c12502c13d966bf9482f001"
+checksum = "3fb1c873e1b9b056a4dc4c0c198b24c3ffa059243875552b2bd0933b1aee4ce2"
 dependencies = [
  "serde_derive",
 ]
 
 [[package]]
 name = "serde_derive"
-version = "1.0.192"
+version = "1.0.197"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d6c7207fbec9faa48073f3e3074cbe553af6ea512d7c21ba46e434e70ea9fbc1"
+checksum = "7eb0b34b42edc17f6b7cac84a52a1c5f0e1bb2227e997ca9011ea3dd34e8610b"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
+ "syn 2.0.55",
 ]
 
 [[package]]
 name = "serde_json"
-version = "1.0.108"
+version = "1.0.115"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3d1c7e3eac408d115102c4c24ad393e0821bb3a5df4d506a80f85f7a742a526b"
+checksum = "12dc5c46daa8e9fdf4f5e71b6cf9a53f2487da0e86e55808e2d35539666497dd"
 dependencies = [
  "itoa",
  "ryu",
@@ -842,9 +814,9 @@ dependencies = [
 
 [[package]]
 name = "smallvec"
-version = "1.11.1"
+version = "1.13.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "942b4a808e05215192e39f4ab80813e599068285906cc91aa64f923db842bd5a"
+checksum = "3c5e1a9a646d36c3599cd173a41282daf47c44583ad367b8e6837255952e5c67"
 
 [[package]]
 name = "static_assertions"
@@ -877,9 +849,9 @@ dependencies = [
 
 [[package]]
 name = "syn"
-version = "2.0.39"
+version = "2.0.55"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "23e78b90f2fcf45d3e842032ce32e3f2d1545ba6636271dcbf24fa306d87be7a"
+checksum = "002a1b3dbf967edfafc32655d0f377ab0bb7b994aa1d32c8cc7e9b8bf3ebb8f0"
 dependencies = [
  "proc-macro2",
  "quote",
@@ -888,14 +860,13 @@ dependencies = [
 
 [[package]]
 name = "synstructure"
-version = "0.13.0"
+version = "0.13.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "285ba80e733fac80aa4270fbcdf83772a79b80aa35c97075320abfee4a915b06"
+checksum = "c8af7666ab7b6390ab78131fb5b0fce11d6b7a6951602017c35fa82800708971"
 dependencies = [
  "proc-macro2",
  "quote",
- "syn 2.0.39",
- "unicode-xid",
+ "syn 2.0.55",
 ]
 
 [[package]]
@@ -906,18 +877,18 @@ checksum = "55937e1799185b12863d447f42597ed69d9928686b8d88a1df17376a097d8369"
 
 [[package]]
 name = "termcolor"
-version = "1.3.0"
+version = "1.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6093bad37da69aab9d123a8091e4be0aa4a03e4d601ec641c327398315f62b64"
+checksum = "06794f8f6c5c898b3275aebefa6b8a1cb24cd2c6c79397ab15774837a0bc5755"
 dependencies = [
  "winapi-util",
 ]
 
 [[package]]
 name = "toml_datetime"
-version = "0.6.5"
+version = "0.6.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "3550f4e9685620ac18a50ed434eb3aec30db8ba93b0287467bca5826ea25baf1"
+checksum = "7cda73e2f1397b1262d6dfdcef8aafae14d1de7748d66822d3bfeeb6d03e5e4b"
 
 [[package]]
 name = "toml_edit"
@@ -930,6 +901,17 @@ dependencies = [
  "winnow",
 ]
 
+[[package]]
+name = "toml_edit"
+version = "0.20.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "396e4d48bbb2b7554c944bde63101b5ae446cff6ec4a24227428f15eb72ef338"
+dependencies = [
+ "indexmap",
+ "toml_datetime",
+ "winnow",
+]
+
 [[package]]
 name = "typenum"
 version = "1.17.0"
@@ -942,12 +924,6 @@ version = "1.0.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3354b9ac3fae1ff6755cb6db53683adb661634f67557942dea4facebec0fee4b"
 
-[[package]]
-name = "unicode-xid"
-version = "0.2.4"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "f962df74c8c05a667b5ee8bcf162993134c104e96440b663c8daa176dc772d8c"
-
 [[package]]
 name = "version_check"
 version = "0.9.4"
@@ -987,18 +963,18 @@ checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
 
 [[package]]
 name = "windows-sys"
-version = "0.48.0"
+version = "0.52.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
+checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
 dependencies = [
  "windows-targets",
 ]
 
 [[package]]
 name = "windows-targets"
-version = "0.48.5"
+version = "0.52.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9a2fa6e2155d7247be68c096456083145c183cbbbc2764150dda45a87197940c"
+checksum = "7dd37b7e5ab9018759f893a1952c9420d060016fc19a472b4bb20d1bdd694d1b"
 dependencies = [
  "windows_aarch64_gnullvm",
  "windows_aarch64_msvc",
@@ -1011,58 +987,58 @@ dependencies = [
 
 [[package]]
 name = "windows_aarch64_gnullvm"
-version = "0.48.5"
+version = "0.52.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "2b38e32f0abccf9987a4e3079dfb67dcd799fb61361e53e2882c3cbaf0d905d8"
+checksum = "bcf46cf4c365c6f2d1cc93ce535f2c8b244591df96ceee75d8e83deb70a9cac9"
 
 [[package]]
 name = "windows_aarch64_msvc"
-version = "0.48.5"
+version = "0.52.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "dc35310971f3b2dbbf3f0690a219f40e2d9afcf64f9ab7cc1be722937c26b4bc"
+checksum = "da9f259dd3bcf6990b55bffd094c4f7235817ba4ceebde8e6d11cd0c5633b675"
 
 [[package]]
 name = "windows_i686_gnu"
-version = "0.48.5"
+version = "0.52.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "a75915e7def60c94dcef72200b9a8e58e5091744960da64ec734a6c6e9b3743e"
+checksum = "b474d8268f99e0995f25b9f095bc7434632601028cf86590aea5c8a5cb7801d3"
 
 [[package]]
 name = "windows_i686_msvc"
-version = "0.48.5"
+version = "0.52.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406"
+checksum = "1515e9a29e5bed743cb4415a9ecf5dfca648ce85ee42e15873c3cd8610ff8e02"
 
 [[package]]
 name = "windows_x86_64_gnu"
-version = "0.48.5"
+version = "0.52.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "53d40abd2583d23e4718fddf1ebec84dbff8381c07cae67ff7768bbf19c6718e"
+checksum = "5eee091590e89cc02ad514ffe3ead9eb6b660aedca2183455434b93546371a03"
 
 [[package]]
 name = "windows_x86_64_gnullvm"
-version = "0.48.5"
+version = "0.52.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"
+checksum = "77ca79f2451b49fa9e2af39f0747fe999fcda4f5e241b2898624dca97a1f2177"
 
 [[package]]
 name = "windows_x86_64_msvc"
-version = "0.48.5"
+version = "0.52.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
+checksum = "32b752e52a2da0ddfbdbcc6fceadfeede4c939ed16d13e648833a61dfb611ed8"
 
 [[package]]
 name = "winnow"
-version = "0.5.19"
+version = "0.5.40"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "829846f3e3db426d4cee4510841b71a8e58aa2a76b1132579487ae430ccd9c7b"
+checksum = "f593a95398737aeed53e489c785df13f3618e41dbcd6718c6addbf1395aa6876"
 dependencies = [
  "memchr",
 ]
 
 [[package]]
-name = "wrapped_azero"
-version = "0.1.0"
+name = "wrapped-azero"
+version = "1.0.0"
 dependencies = [
  "ink",
  "parity-scale-codec",
@@ -1081,6 +1057,6 @@ dependencies = [
 
 [[package]]
 name = "xxhash-rust"
-version = "0.8.7"
+version = "0.8.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9828b178da53440fa9c766a3d2f73f7cf5d0ac1fe3980c1e5018d899fd19e07b"
+checksum = "927da81e25be1e1a2901d59b81b37dd2efd1fc9c9345a55007f09bf5a2d3ee03"
diff --git a/Cargo.toml b/Cargo.toml
index aba4cb1..02c71e6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "wrapped-azero"
-version = "0.1.0"
+version = "1.0.0"
 edition = "2021"
 authors = ["Cardinal"]
 homepage = "https://github.com/Cardinal-Cryptography/wAZERO"
@@ -11,12 +11,12 @@ description = "Smart contract for AZERO coin wrapped as a PSP22 token"
 exclude = [ ".github/*" ]
 
 [dependencies]
-ink = { version = "4.3", default-features = false }
+ink = { version = "=4.3.0", default-features = false }
 
 scale = { package = "parity-scale-codec", version = "3", default-features = false, features = ["derive"] }
 scale-info = { version = "2.9", default-features = false, features = ["derive"], optional = true }
 
-psp22 = { version = "0.2", default-features = false }
+psp22 = { version = "=0.2.2", default-features = false }
 
 [lib]
 path = "lib.rs"
@@ -29,4 +29,5 @@ std = [
     "scale-info/std",
     "psp22/std",
 ]
+contract = []
 ink-as-dependency = []
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..23bd583
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,15 @@
+.PHONY: build
+build:
+	@docker run --rm \
+		--name ink-dev \
+		--volume "$(shell pwd)":/code \
+		public.ecr.aws/p6e8q1z1/ink-dev:2.1.0 \
+		cargo contract build --release --features "contract"
+
+.PHONY: test
+test:
+	@docker run --rm \
+		--name ink-dev \
+		--volume "$(shell pwd)":/code \
+		public.ecr.aws/p6e8q1z1/ink-dev:2.1.0 \
+		cargo test --features "contract"
diff --git a/README.md b/README.md
index 3620c5b..8b73406 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,69 @@
-# wAZERO
-ink! smart contract for AZERO wrapped as a PSP22 token
+# Wrapped AZERO
+
+This repository contains an [ink!][ink] smart contract for [Aleph Zero][aleph] blockchain which enables wrapping the native chain coin (AZERO) into a fungible token following [PSP22][psp22] standard.
+
+The contract is deployed to both test and main networks under the following addresses:
+ - Aleph Zero Mainnet: `[TODO]`
+ - Aleph Zero Testnet: `[TODO]`
+
+The [`artifacts`][artifacts] folder contains the exact compiled binary that has been deployed, as well as all other compilation artifacts for verification purposes.
+
+The contents of this repository has been published to [crates.io][wazero-crates] to allow for easy integration from other projects.
+
+## How to interact with Wrapped AZERO from other contracts
+
+1. Add the [wrapped-azero][wazero-crates] dependency in your project's `Cargo.toml`:
+```TOML
+wrapped-azero = { version = "1.0", default-features = false }
+# ...
+[features]
+# ...
+std = [
+    # ...
+    "wrapped-azero/std",
+]
+
+```
+
+2. To call `deposit` and `withdraw` methods from your contract, use [`contract_ref`][contract_ref] macro with `WrappedAZERO` trait:
+```rust
+use ink::{codegen::TraitCallBuilder, contract_ref};
+use wrapped_azero::{WrappedAZERO, MAINNET};
+
+let mut wazero: contract_ref!(WrappedAZERO) = MAINNET.into();
+wazero.withdraw(amount); // returns Result<(), PSP22Error>
+
+// Deposit call must be composed manually to be able to attach AZERO transfer
+wazero.call_mut().deposit().transferred_value(amount).invoke(); // returns Result<(), PSP22Error>
+
+```
+
+3. To call regular PSP22 methods (transfers, balances, approvals) from your contract, use  [`contract_ref`][contract_ref] macro with `PSP22` trait:
+```rust
+use ink::contract_ref;
+use ink::prelude::vec;
+use wrapped_azero::{PSP22, MAINNET};
+
+let mut wazero: contract_ref!(PSP22) = MAINNET.into();
+let balance = wazero.balance_of(some_account);
+wazero.transfer(recipient, value, vec![]); // returns Result<(), PSP22Error>
+```
+
+## How to interact with Wrapped AZERO manually via web interface
+
+1. Go to [Contracts UI][contracts-ui].
+2. Select "Aleph Zero" (or "Aleph Zero Testnet") from the networks menu in top left corner.
+3. Choose "Add New Contract" and then "Use On-Chain Contract Address".
+4. Paste the Mainnet (Testnet) address listed above.
+5. Choose any name you like and use the [metadata file][metadata] from `artifacts` folder.
+6. Choose the caller and the method to call. For read-only methods (like `psp22::balanceOf`) you will see the response immediately. For other methods fill in the parameters (leave all the limits with their default values) and sign the transaction (you need to have Aleph Zero Signer or similar browser extension connected with Contracts UI).
+
+[traits]: ./traits.rs
+[artifacts]: ./artifacts
+[metadata]: ./artifacts/wrapped_azero.json
+[wazero-crates]: https://crates.io/crates/wrapped-azero
+[aleph]: https://alephzero.org/
+[ink]: https://use.ink
+[psp22]: https://github.com/inkdevhub/standards/blob/master/PSPs/psp-22.md
+[contract_ref]: https://paritytech.github.io/ink/ink/macro.contract_ref.html
+[contracts-ui]: https://contracts-ui.substrate.io
\ No newline at end of file
diff --git a/RELEASE_TODO.md b/RELEASE_TODO.md
new file mode 100644
index 0000000..a65abbb
--- /dev/null
+++ b/RELEASE_TODO.md
@@ -0,0 +1,10 @@
+The release procedure:
+
+1. Compile the current version of the crate with `make build`.
+2. Deploy contracts to Testnet and Mainnet.
+3. Prepare a release PR which:
+    a. Inserts deployed addresses in `traits.rs` and `README.md`,
+    b. Updates `.contract`, `.json` and `.wasm` files in `artifacts`,
+    c. Deletes this file.
+4. Merge the release PR and tag the resulting commit with `1.0.0`.
+5. Publish to crates.io
\ No newline at end of file
diff --git a/artifacts/wrapped_azero.contract b/artifacts/wrapped_azero.contract
new file mode 100644
index 0000000..e515e14
--- /dev/null
+++ b/artifacts/wrapped_azero.contract
@@ -0,0 +1 @@
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diff --git a/artifacts/wrapped_azero.json b/artifacts/wrapped_azero.json
new file mode 100644
index 0000000..740441c
--- /dev/null
+++ b/artifacts/wrapped_azero.json
@@ -0,0 +1,1116 @@
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+        "def": {
+          "variant": {
+            "variants": [
+              {
+                "fields": [
+                  {
+                    "type": 5
+                  }
+                ],
+                "index": 0,
+                "name": "Ok"
+              },
+              {
+                "fields": [
+                  {
+                    "type": 3
+                  }
+                ],
+                "index": 1,
+                "name": "Err"
+              }
+            ]
+          }
+        },
+        "params": [
+          {
+            "name": "T",
+            "type": 5
+          },
+          {
+            "name": "E",
+            "type": 3
+          }
+        ],
+        "path": [
+          "Result"
+        ]
+      }
+    },
+    {
+      "id": 5,
+      "type": {
+        "def": {
+          "variant": {
+            "variants": [
+              {
+                "fields": [
+                  {
+                    "type": 2
+                  }
+                ],
+                "index": 0,
+                "name": "Ok"
+              },
+              {
+                "fields": [
+                  {
+                    "type": 6
+                  }
+                ],
+                "index": 1,
+                "name": "Err"
+              }
+            ]
+          }
+        },
+        "params": [
+          {
+            "name": "T",
+            "type": 2
+          },
+          {
+            "name": "E",
+            "type": 6
+          }
+        ],
+        "path": [
+          "Result"
+        ]
+      }
+    },
+    {
+      "id": 6,
+      "type": {
+        "def": {
+          "variant": {
+            "variants": [
+              {
+                "fields": [
+                  {
+                    "type": 7,
+                    "typeName": "String"
+                  }
+                ],
+                "index": 0,
+                "name": "Custom"
+              },
+              {
+                "index": 1,
+                "name": "InsufficientBalance"
+              },
+              {
+                "index": 2,
+                "name": "InsufficientAllowance"
+              },
+              {
+                "index": 3,
+                "name": "ZeroRecipientAddress"
+              },
+              {
+                "index": 4,
+                "name": "ZeroSenderAddress"
+              },
+              {
+                "fields": [
+                  {
+                    "type": 7,
+                    "typeName": "String"
+                  }
+                ],
+                "index": 5,
+                "name": "SafeTransferCheckFailed"
+              }
+            ]
+          }
+        },
+        "path": [
+          "psp22",
+          "errors",
+          "PSP22Error"
+        ]
+      }
+    },
+    {
+      "id": 7,
+      "type": {
+        "def": {
+          "primitive": "str"
+        }
+      }
+    },
+    {
+      "id": 8,
+      "type": {
+        "def": {
+          "variant": {
+            "variants": [
+              {
+                "fields": [
+                  {
+                    "type": 9
+                  }
+                ],
+                "index": 0,
+                "name": "Ok"
+              },
+              {
+                "fields": [
+                  {
+                    "type": 3
+                  }
+                ],
+                "index": 1,
+                "name": "Err"
+              }
+            ]
+          }
+        },
+        "params": [
+          {
+            "name": "T",
+            "type": 9
+          },
+          {
+            "name": "E",
+            "type": 3
+          }
+        ],
+        "path": [
+          "Result"
+        ]
+      }
+    },
+    {
+      "id": 9,
+      "type": {
+        "def": {
+          "variant": {
+            "variants": [
+              {
+                "index": 0,
+                "name": "None"
+              },
+              {
+                "fields": [
+                  {
+                    "type": 7
+                  }
+                ],
+                "index": 1,
+                "name": "Some"
+              }
+            ]
+          }
+        },
+        "params": [
+          {
+            "name": "T",
+            "type": 7
+          }
+        ],
+        "path": [
+          "Option"
+        ]
+      }
+    },
+    {
+      "id": 10,
+      "type": {
+        "def": {
+          "variant": {
+            "variants": [
+              {
+                "fields": [
+                  {
+                    "type": 11
+                  }
+                ],
+                "index": 0,
+                "name": "Ok"
+              },
+              {
+                "fields": [
+                  {
+                    "type": 3
+                  }
+                ],
+                "index": 1,
+                "name": "Err"
+              }
+            ]
+          }
+        },
+        "params": [
+          {
+            "name": "T",
+            "type": 11
+          },
+          {
+            "name": "E",
+            "type": 3
+          }
+        ],
+        "path": [
+          "Result"
+        ]
+      }
+    },
+    {
+      "id": 11,
+      "type": {
+        "def": {
+          "primitive": "u8"
+        }
+      }
+    },
+    {
+      "id": 12,
+      "type": {
+        "def": {
+          "variant": {
+            "variants": [
+              {
+                "fields": [
+                  {
+                    "type": 0
+                  }
+                ],
+                "index": 0,
+                "name": "Ok"
+              },
+              {
+                "fields": [
+                  {
+                    "type": 3
+                  }
+                ],
+                "index": 1,
+                "name": "Err"
+              }
+            ]
+          }
+        },
+        "params": [
+          {
+            "name": "T",
+            "type": 0
+          },
+          {
+            "name": "E",
+            "type": 3
+          }
+        ],
+        "path": [
+          "Result"
+        ]
+      }
+    },
+    {
+      "id": 13,
+      "type": {
+        "def": {
+          "composite": {
+            "fields": [
+              {
+                "type": 14,
+                "typeName": "[u8; 32]"
+              }
+            ]
+          }
+        },
+        "path": [
+          "ink_primitives",
+          "types",
+          "AccountId"
+        ]
+      }
+    },
+    {
+      "id": 14,
+      "type": {
+        "def": {
+          "array": {
+            "len": 32,
+            "type": 11
+          }
+        }
+      }
+    },
+    {
+      "id": 15,
+      "type": {
+        "def": {
+          "sequence": {
+            "type": 11
+          }
+        }
+      }
+    },
+    {
+      "id": 16,
+      "type": {
+        "def": {
+          "variant": {
+            "variants": [
+              {
+                "index": 0,
+                "name": "None"
+              },
+              {
+                "fields": [
+                  {
+                    "type": 13
+                  }
+                ],
+                "index": 1,
+                "name": "Some"
+              }
+            ]
+          }
+        },
+        "params": [
+          {
+            "name": "T",
+            "type": 13
+          }
+        ],
+        "path": [
+          "Option"
+        ]
+      }
+    },
+    {
+      "id": 17,
+      "type": {
+        "def": {
+          "composite": {
+            "fields": [
+              {
+                "type": 14,
+                "typeName": "[u8; 32]"
+              }
+            ]
+          }
+        },
+        "path": [
+          "ink_primitives",
+          "types",
+          "Hash"
+        ]
+      }
+    },
+    {
+      "id": 18,
+      "type": {
+        "def": {
+          "primitive": "u64"
+        }
+      }
+    },
+    {
+      "id": 19,
+      "type": {
+        "def": {
+          "primitive": "u32"
+        }
+      }
+    },
+    {
+      "id": 20,
+      "type": {
+        "def": {
+          "variant": {}
+        },
+        "path": [
+          "ink_env",
+          "types",
+          "NoChainExtension"
+        ]
+      }
+    }
+  ],
+  "version": "4"
+}
\ No newline at end of file
diff --git a/artifacts/wrapped_azero.wasm b/artifacts/wrapped_azero.wasm
new file mode 100644
index 0000000..413de89
Binary files /dev/null and b/artifacts/wrapped_azero.wasm differ
diff --git a/lib.rs b/lib.rs
index f73951b..c47e511 100644
--- a/lib.rs
+++ b/lib.rs
@@ -2,8 +2,12 @@
 
 mod traits;
 
-pub use traits::WrappedAZERO;
+// Re-export of PSP22 stuff for convenience of cross-contract calls
+pub use psp22::{PSP22Error, PSP22};
 
+pub use traits::{WrappedAZERO, MAINNET, TESTNET};
+
+#[cfg(feature = "contract")]
 #[ink::contract]
 mod wazero {
     use crate::WrappedAZERO;
diff --git a/rust-toolchain.toml b/rust-toolchain.toml
index 91e2cd5..8926550 100644
--- a/rust-toolchain.toml
+++ b/rust-toolchain.toml
@@ -1,5 +1,5 @@
 [toolchain]
-channel = "1.72.1"
+channel = "1.76.0"
 components = ["rustfmt", "rust-src", "clippy"]
 targets = ["wasm32-unknown-unknown"]
 profile = "minimal"
diff --git a/traits.rs b/traits.rs
index f191ae6..25167a9 100644
--- a/traits.rs
+++ b/traits.rs
@@ -31,3 +31,8 @@ pub trait WrappedAZERO {
     #[ink(message)]
     fn withdraw(&mut self, value: u128) -> Result<(), PSP22Error>;
 }
+
+/// Mainnet deployment address
+pub const MAINNET: &str = "TODO";
+/// Testnet deployment address
+pub const TESTNET: &str = "TODO";