diff --git a/Cargo.lock b/Cargo.lock
index 38652cc..00cad39 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -162,7 +162,7 @@ version = "1.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5ca11d4be1bab0c8bc8734a9aa7bf4ee8316d462a08c6ac5052f888fef5b494b"
 dependencies = [
- "windows-sys",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -172,7 +172,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "58f54d10c6dfa51283a066ceab3ec1ab78d13fae00aa49243a45e4571fb79dfd"
 dependencies = [
  "anstyle",
- "windows-sys",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -196,11 +196,23 @@ version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1d6c2b318ee6e10f8c2853e73a83adc0ccb88995aa978d8a3408d492ab2ee671"
 dependencies = [
- "ark-serialize-derive",
- "ark-std",
+ "ark-serialize-derive 0.3.0",
+ "ark-std 0.3.0",
  "digest 0.9.0",
 ]
 
+[[package]]
+name = "ark-serialize"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "adb7b85a02b83d2f22f89bd5cac66c9c89474240cb6207cb1efc16d098e822a5"
+dependencies = [
+ "ark-serialize-derive 0.4.2",
+ "ark-std 0.4.0",
+ "digest 0.10.7",
+ "num-bigint",
+]
+
 [[package]]
 name = "ark-serialize-derive"
 version = "0.3.0"
@@ -212,6 +224,17 @@ dependencies = [
  "syn 1.0.109",
 ]
 
+[[package]]
+name = "ark-serialize-derive"
+version = "0.4.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ae3281bc6d0fd7e549af32b52511e1302185bd688fd3359fa36423346ff682ea"
+dependencies = [
+ "proc-macro2",
+ "quote",
+ "syn 1.0.109",
+]
+
 [[package]]
 name = "ark-std"
 version = "0.3.0"
@@ -222,6 +245,16 @@ dependencies = [
  "rand 0.8.5",
 ]
 
+[[package]]
+name = "ark-std"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "94893f1e0c6eeab764ade8dc4c0db24caf4fe7cbbaafc0eba0a9030f447b5185"
+dependencies = [
+ "num-traits",
+ "rand 0.8.5",
+]
+
 [[package]]
 name = "array-init"
 version = "0.0.4"
@@ -383,7 +416,7 @@ dependencies = [
  "futures-lite",
  "rustix 0.37.25",
  "signal-hook",
- "windows-sys",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -779,7 +812,7 @@ dependencies = [
  "num-traits",
  "serde",
  "wasm-bindgen",
- "windows-targets",
+ "windows-targets 0.48.5",
 ]
 
 [[package]]
@@ -929,19 +962,18 @@ checksum = "acbf1af155f9b9ef647e42cdc158db4b64a1b61f743629225fde6f3e0be2a7c7"
 [[package]]
 name = "commit"
 version = "0.2.2"
-source = "git+https://github.com/EspressoSystems/commit?tag=0.2.2#7e938186607f87da5fd642ce36313aaeab0cfaca"
+source = "git+https://github.com/EspressoSystems/commit#30679718efd4ecf870b66950160077125dcb8d93"
 dependencies = [
  "arbitrary",
- "ark-serialize",
+ "ark-serialize 0.4.2",
  "bitvec",
  "derivative",
  "derive_more",
  "funty",
- "generic-array",
  "hex",
  "serde",
  "sha3",
- "tagged-base64",
+ "tagged-base64 0.3.4",
 ]
 
 [[package]]
@@ -1002,6 +1034,15 @@ version = "0.1.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "245097e9a4535ee1e3e3931fcfcd55a796a44c643e8596ff6566d68f09b87bbc"
 
+[[package]]
+name = "contract-bindings"
+version = "0.1.0"
+source = "git+https://github.com/EspressoSystems/espresso-sequencer.git#fbebb81097c41679050ccd979d62b059addb0c2b"
+dependencies = [
+ "ethers",
+ "serde",
+]
+
 [[package]]
 name = "convert_case"
 version = "0.4.0"
@@ -1341,7 +1382,7 @@ dependencies = [
  "libc",
  "option-ext",
  "redox_users",
- "windows-sys",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -1516,23 +1557,12 @@ dependencies = [
 
 [[package]]
 name = "errno"
-version = "0.3.3"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "136526188508e25c6fef639d7927dfb3e0e3084488bf202267829cf7fc23dbdd"
-dependencies = [
- "errno-dragonfly",
- "libc",
- "windows-sys",
-]
-
-[[package]]
-name = "errno-dragonfly"
-version = "0.1.2"
+version = "0.3.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "aa68f1b12764fab894d2755d2518754e71b4fd80ecfb822714a1206c2aab39bf"
+checksum = "a258e46cdc063eb8519c00b9fc845fc47bcfca4130e2f08e88665ceda8474245"
 dependencies = [
- "cc",
  "libc",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -1880,9 +1910,9 @@ dependencies = [
 
 [[package]]
 name = "fastrand"
-version = "2.0.0"
+version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "6999dc1837253364c2ebb0704ba97994bd874e8f195d665c50b7548f6ea92764"
+checksum = "25cbce373ec4653f1a01a31e8a5e5ec0c622dc27ff9c4e6606eefef5cbbed4a5"
 
 [[package]]
 name = "ff"
@@ -2103,7 +2133,6 @@ version = "0.14.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "85649ca51fd72272d7821adaf274ad91c288277713d9c18820d8499a7ff69e9a"
 dependencies = [
- "serde",
  "typenum",
  "version_check",
  "zeroize",
@@ -2272,7 +2301,7 @@ version = "0.5.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5444c27eef6923071f7ebcc33e3444508466a76f7a2b93da00ed6e19f30c1ddb"
 dependencies = [
- "windows-sys",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -2548,7 +2577,7 @@ checksum = "eae7b9aee968036d54dce06cebaefd919e4472e753296daccd6d344e3e2df0c2"
 dependencies = [
  "hermit-abi",
  "libc",
- "windows-sys",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -2564,8 +2593,8 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cb0889898416213fab133e1d33a0e5858a48177452750691bde3666d0fdbaf8b"
 dependencies = [
  "hermit-abi",
- "rustix 0.38.13",
- "windows-sys",
+ "rustix 0.38.31",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -2735,9 +2764,9 @@ checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
 name = "libc"
-version = "0.2.148"
+version = "0.2.153"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "9cdc71e17332e86d2e1d38c1f99edcb6288ee11b815fb1a4b049eaa2114d369b"
+checksum = "9c198f91728a82281a64e1f4f9eeb25d82cb32a5de251c6bd1b5154d63a8e7bd"
 
 [[package]]
 name = "libnghttp2-sys"
@@ -2775,9 +2804,9 @@ checksum = "ef53942eb7bf7ff43a617b3e2c1c4a5ecf5944a7c1bc12d7ee39bbb15e5c1519"
 
 [[package]]
 name = "linux-raw-sys"
-version = "0.4.7"
+version = "0.4.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "1a9bad9f94746442c783ca431b22403b519cd7fbeed0533fdd6328b2f2212128"
+checksum = "01cda141df6706de531b6c46c3a33ecca755538219bd484262fa09410c13539c"
 
 [[package]]
 name = "lock_api"
@@ -2910,7 +2939,7 @@ checksum = "927a765cd3fc26206e66b296465fa9d3e5ab003e651c1b3c060e7956d96b19d2"
 dependencies = [
  "libc",
  "wasi 0.11.0+wasi-snapshot-preview1",
- "windows-sys",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -3159,7 +3188,7 @@ dependencies = [
  "libc",
  "redox_syscall 0.3.5",
  "smallvec 1.11.0",
- "windows-targets",
+ "windows-targets 0.48.5",
 ]
 
 [[package]]
@@ -3411,7 +3440,7 @@ dependencies = [
  "libc",
  "log",
  "pin-project-lite 0.2.13",
- "windows-sys",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -3886,20 +3915,20 @@ dependencies = [
  "io-lifetimes",
  "libc",
  "linux-raw-sys 0.3.8",
- "windows-sys",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
 name = "rustix"
-version = "0.38.13"
+version = "0.38.31"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d7db8590df6dfcd144d22afd1b83b36c21a18d7cbc1dc4bb5295a8712e9eb662"
+checksum = "6ea3e1a662af26cd7a3ba09c0297a31af215563ecf42817c98df621387f4e949"
 dependencies = [
  "bitflags 2.4.0",
  "errno",
  "libc",
- "linux-raw-sys 0.4.7",
- "windows-sys",
+ "linux-raw-sys 0.4.13",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -4015,7 +4044,7 @@ version = "0.1.22"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0c3733bf4cf7ea0880754e19cb5a462007c4a8c1914bff372ccc95b464f1df88"
 dependencies = [
- "windows-sys",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -4099,11 +4128,13 @@ checksum = "cd0b0ec5f1c1ca621c432a25813d8d60c88abe6d3e08a3eb9cf37d97a0fe3d73"
 [[package]]
 name = "sequencer-utils"
 version = "0.1.0"
-source = "git+https://github.com/EspressoSystems/espresso-sequencer.git#8caa3345fcf0ef79ab35f21a422076d209035a80"
+source = "git+https://github.com/EspressoSystems/espresso-sequencer.git#fbebb81097c41679050ccd979d62b059addb0c2b"
 dependencies = [
- "ark-serialize",
+ "anyhow",
+ "ark-serialize 0.4.2",
  "async-std",
  "commit",
+ "contract-bindings",
  "ethers",
  "portpicker",
  "surf",
@@ -4527,7 +4558,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4031e820eb552adee9295814c0ced9e5cf38ddf1e8b7d566d6de8e2538ea989e"
 dependencies = [
  "libc",
- "windows-sys",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -4835,21 +4866,44 @@ name = "tagged-base64"
 version = "0.2.4"
 source = "git+https://github.com/EspressoSystems/tagged-base64.git?tag=0.2.4#9b9a5fae1e2fd41db8573657cfe169e8284eb6c9"
 dependencies = [
- "ark-serialize",
+ "ark-serialize 0.3.0",
  "base64 0.13.1",
  "crc-any",
  "serde",
  "snafu",
- "tagged-base64-macros",
+ "tagged-base64-macros 0.2.0",
  "wasm-bindgen",
 ]
 
+[[package]]
+name = "tagged-base64"
+version = "0.3.4"
+source = "git+https://github.com/EspressoSystems/tagged-base64?tag=0.3.4#93be6f0f5c0ec8458f13dede3d2b68dcce12a608"
+dependencies = [
+ "ark-serialize 0.4.2",
+ "ark-std 0.4.0",
+ "base64 0.21.4",
+ "crc-any",
+ "serde",
+ "snafu",
+ "tagged-base64-macros 0.3.3",
+]
+
 [[package]]
 name = "tagged-base64-macros"
 version = "0.2.0"
 source = "git+https://github.com/EspressoSystems/tagged-base64.git?tag=0.2.4#9b9a5fae1e2fd41db8573657cfe169e8284eb6c9"
 dependencies = [
- "ark-std",
+ "ark-std 0.3.0",
+ "quote",
+ "syn 1.0.109",
+]
+
+[[package]]
+name = "tagged-base64-macros"
+version = "0.3.3"
+source = "git+https://github.com/EspressoSystems/tagged-base64?tag=0.3.4#93be6f0f5c0ec8458f13dede3d2b68dcce12a608"
+dependencies = [
  "quote",
  "syn 1.0.109",
 ]
@@ -4862,15 +4916,14 @@ checksum = "55937e1799185b12863d447f42597ed69d9928686b8d88a1df17376a097d8369"
 
 [[package]]
 name = "tempfile"
-version = "3.8.0"
+version = "3.10.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cb94d2f3cc536af71caac6b6fcebf65860b347e7ce0cc9ebe8f70d3e521054ef"
+checksum = "85b77fafb263dd9d05cbeac119526425676db3784113aa9295c88498cbf8bff1"
 dependencies = [
  "cfg-if",
- "fastrand 2.0.0",
- "redox_syscall 0.3.5",
- "rustix 0.38.13",
- "windows-sys",
+ "fastrand 2.0.1",
+ "rustix 0.38.31",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -4969,7 +5022,7 @@ dependencies = [
  "strum",
  "strum_macros",
  "surf",
- "tagged-base64",
+ "tagged-base64 0.2.4",
  "tide",
  "tide-websockets",
  "toml 0.7.8",
@@ -5103,7 +5156,7 @@ dependencies = [
  "pin-project-lite 0.2.13",
  "socket2 0.5.4",
  "tokio-macros",
- "windows-sys",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]
@@ -5779,7 +5832,7 @@ version = "0.48.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e686886bc078bc1b0b600cac0147aadb815089b6e4da64016cbd754b6342700f"
 dependencies = [
- "windows-targets",
+ "windows-targets 0.48.5",
 ]
 
 [[package]]
@@ -5788,7 +5841,16 @@ version = "0.48.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "677d2418bec65e3338edb076e806bc1ec15693c5d0104683f2efe857f61056a9"
 dependencies = [
- "windows-targets",
+ "windows-targets 0.48.5",
+]
+
+[[package]]
+name = "windows-sys"
+version = "0.52.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "282be5f36a8ce781fad8c8ae18fa3f9beff57ec1b52cb3de0789201425d9a33d"
+dependencies = [
+ "windows-targets 0.52.4",
 ]
 
 [[package]]
@@ -5797,13 +5859,28 @@ version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9a2fa6e2155d7247be68c096456083145c183cbbbc2764150dda45a87197940c"
 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",
+ "windows_aarch64_gnullvm 0.48.5",
+ "windows_aarch64_msvc 0.48.5",
+ "windows_i686_gnu 0.48.5",
+ "windows_i686_msvc 0.48.5",
+ "windows_x86_64_gnu 0.48.5",
+ "windows_x86_64_gnullvm 0.48.5",
+ "windows_x86_64_msvc 0.48.5",
+]
+
+[[package]]
+name = "windows-targets"
+version = "0.52.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7dd37b7e5ab9018759f893a1952c9420d060016fc19a472b4bb20d1bdd694d1b"
+dependencies = [
+ "windows_aarch64_gnullvm 0.52.4",
+ "windows_aarch64_msvc 0.52.4",
+ "windows_i686_gnu 0.52.4",
+ "windows_i686_msvc 0.52.4",
+ "windows_x86_64_gnu 0.52.4",
+ "windows_x86_64_gnullvm 0.52.4",
+ "windows_x86_64_msvc 0.52.4",
 ]
 
 [[package]]
@@ -5812,42 +5889,84 @@ version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2b38e32f0abccf9987a4e3079dfb67dcd799fb61361e53e2882c3cbaf0d905d8"
 
+[[package]]
+name = "windows_aarch64_gnullvm"
+version = "0.52.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bcf46cf4c365c6f2d1cc93ce535f2c8b244591df96ceee75d8e83deb70a9cac9"
+
 [[package]]
 name = "windows_aarch64_msvc"
 version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dc35310971f3b2dbbf3f0690a219f40e2d9afcf64f9ab7cc1be722937c26b4bc"
 
+[[package]]
+name = "windows_aarch64_msvc"
+version = "0.52.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "da9f259dd3bcf6990b55bffd094c4f7235817ba4ceebde8e6d11cd0c5633b675"
+
 [[package]]
 name = "windows_i686_gnu"
 version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a75915e7def60c94dcef72200b9a8e58e5091744960da64ec734a6c6e9b3743e"
 
+[[package]]
+name = "windows_i686_gnu"
+version = "0.52.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "b474d8268f99e0995f25b9f095bc7434632601028cf86590aea5c8a5cb7801d3"
+
 [[package]]
 name = "windows_i686_msvc"
 version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8f55c233f70c4b27f66c523580f78f1004e8b5a8b659e05a4eb49d4166cca406"
 
+[[package]]
+name = "windows_i686_msvc"
+version = "0.52.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1515e9a29e5bed743cb4415a9ecf5dfca648ce85ee42e15873c3cd8610ff8e02"
+
 [[package]]
 name = "windows_x86_64_gnu"
 version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "53d40abd2583d23e4718fddf1ebec84dbff8381c07cae67ff7768bbf19c6718e"
 
+[[package]]
+name = "windows_x86_64_gnu"
+version = "0.52.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5eee091590e89cc02ad514ffe3ead9eb6b660aedca2183455434b93546371a03"
+
 [[package]]
 name = "windows_x86_64_gnullvm"
 version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0b7b52767868a23d5bab768e390dc5f5c55825b6d30b86c844ff2dc7414044cc"
 
+[[package]]
+name = "windows_x86_64_gnullvm"
+version = "0.52.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "77ca79f2451b49fa9e2af39f0747fe999fcda4f5e241b2898624dca97a1f2177"
+
 [[package]]
 name = "windows_x86_64_msvc"
 version = "0.48.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ed94fce61571a4006852b7389a063ab983c02eb1bb37b47f8272ce92d06d9538"
 
+[[package]]
+name = "windows_x86_64_msvc"
+version = "0.52.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "32b752e52a2da0ddfbdbcc6fceadfeede4c939ed16d13e648833a61dfb611ed8"
+
 [[package]]
 name = "winnow"
 version = "0.5.15"
@@ -5864,7 +5983,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "524e57b2c537c0f9b1e69f1965311ec12182b4122e45035b1508cd24d2adadb1"
 dependencies = [
  "cfg-if",
- "windows-sys",
+ "windows-sys 0.48.0",
 ]
 
 [[package]]