diff --git a/Cargo.lock b/Cargo.lock
index c9308368..92856f0e 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2737,25 +2737,11 @@ checksum = "37909eebbb50d72f9059c3b6d82c0463f2ff062c9e95845c43a6c9c0355411be"
 
 [[package]]
 name = "fastrlp"
-version = "0.3.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "139834ddba373bbdd213dffe02c8d110508dcf1726c2be27e8d1f7d7e1856418"
-dependencies = [
- "arrayvec",
- "auto_impl",
- "bytes",
-]
+version = "0.3.99"
 
 [[package]]
 name = "fastrlp"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ce8dba4714ef14b8274c371879b175aa55b16b30f269663f19d576f380018dc4"
-dependencies = [
- "arrayvec",
- "auto_impl",
- "bytes",
-]
+version = "0.4.99"
 
 [[package]]
 name = "fdlimit"
@@ -3845,15 +3831,6 @@ dependencies = [
  "xmltree",
 ]
 
-[[package]]
-name = "impl-codec"
-version = "0.6.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "ba6a270039626615617f3f36d15fc827041df3b78c439da2cadfa47455a77f2f"
-dependencies = [
- "parity-scale-codec",
-]
-
 [[package]]
 name = "impl-codec"
 version = "0.7.1"
@@ -3871,7 +3848,7 @@ checksum = "803d15461ab0dcc56706adf266158acbc44ccf719bf7d0af30705f58b90a4b8c"
 dependencies = [
  "integer-sqrt",
  "num-traits",
- "uint 0.10.0",
+ "uint",
 ]
 
 [[package]]
@@ -4383,7 +4360,7 @@ dependencies = [
  "smallvec",
  "thiserror 2.0.17",
  "tracing",
- "uint 0.10.0",
+ "uint",
  "web-time",
 ]
 
@@ -6017,14 +5994,7 @@ dependencies = [
 
 [[package]]
 name = "primitive-types"
-version = "0.12.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "0b34d9fd68ae0b74a41b21c03c2f62847aa0ffea044eee893b4c140b37e244e2"
-dependencies = [
- "fixed-hash",
- "impl-codec 0.6.0",
- "uint 0.9.5",
-]
+version = "0.12.99"
 
 [[package]]
 name = "primitive-types"
@@ -6033,11 +6003,11 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "721a1da530b5a2633218dc9f75713394c983c352be88d2d7c9ee85e2c4c21794"
 dependencies = [
  "fixed-hash",
- "impl-codec 0.7.1",
+ "impl-codec",
  "impl-num-traits",
  "impl-serde",
  "scale-info",
- "uint 0.10.0",
+ "uint",
 ]
 
 [[package]]
@@ -6811,13 +6781,7 @@ dependencies = [
 
 [[package]]
 name = "rlp"
-version = "0.5.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "bb919243f34364b6bd2fc10ef797edbfa75f33c252e7998527479c6d6b47e1ec"
-dependencies = [
- "bytes",
- "rustc-hex",
-]
+version = "0.5.99"
 
 [[package]]
 name = "rocksdb"
@@ -6885,13 +6849,13 @@ dependencies = [
  "ark-ff 0.4.99",
  "ark-ff 0.5.0",
  "bytes",
- "fastrlp 0.3.1",
- "fastrlp 0.4.0",
+ "fastrlp 0.3.99",
+ "fastrlp 0.4.99",
  "num-bigint",
  "num-integer",
  "num-traits",
  "parity-scale-codec",
- "primitive-types 0.12.2",
+ "primitive-types 0.12.99",
  "proptest",
  "rand 0.8.5",
  "rand 0.9.2",
@@ -10647,18 +10611,6 @@ version = "1.19.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "562d481066bde0658276a35467c4af00bdc6ee726305698a55b86e61d7ad82bb"
 
-[[package]]
-name = "uint"
-version = "0.9.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "76f64bba2c53b04fcab63c01a7d7427eadc821e3bc48c34dc9ba29c501164b52"
-dependencies = [
- "byteorder",
- "crunchy",
- "hex",
- "static_assertions",
-]
-
 [[package]]
 name = "uint"
 version = "0.10.0"
diff --git a/Cargo.toml b/Cargo.toml
index 50941bdc..9975d574 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -184,7 +184,11 @@ alloy-eip2124 = { path = "patches/ethereum/alloy-eip2124" }
 ark-ff-3 = { package = "ark-ff", path = "patches/ethereum/ark-ff-0.3" }
 ark-ff-4 = { package = "ark-ff", path = "patches/ethereum/ark-ff-0.4" }
 c-kzg = { path = "patches/ethereum/c-kzg" }
-secp256k1-30 = { package = "secp256k1", path = "patches/ethereum/secp256k1-30" }
+fastrlp-3 = { package = "fastrlp", path = "patches/ethereum/fastrlp-0.3" }
+fastrlp-4 = { package = "fastrlp", path = "patches/ethereum/fastrlp-0.4" }
+primitive-types-12 = { package = "primitive-types", path = "patches/ethereum/primitive-types-0.12" }
+rlp = { path = "patches/ethereum/rlp" }
+secp256k1-30 = { package = "secp256k1", path = "patches/ethereum/secp256k1-0.30" }
 
 # Dependencies from monero-oxide which originate from within our own tree,  potentially shimmed to account for deviations since publishing
 std-shims = { path = "patches/std-shims" }
diff --git a/patches/ethereum/fastrlp-0.3/Cargo.toml b/patches/ethereum/fastrlp-0.3/Cargo.toml
new file mode 100644
index 00000000..f8ad344c
--- /dev/null
+++ b/patches/ethereum/fastrlp-0.3/Cargo.toml
@@ -0,0 +1,19 @@
+[package]
+name = "fastrlp"
+version = "0.3.99"
+description = "Patch to an empty crate"
+license = "MIT"
+repository = "https://github.com/serai-dex/serai/tree/develop/patches/ethereum/fastrlp-0.3"
+authors = ["Luke Parker <lukeparker5132@gmail.com>"]
+keywords = []
+edition = "2021"
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+
+[workspace]
+
+[features]
+alloc = []
+std = []
diff --git a/patches/ethereum/secp256k1-30/src/lib.rs b/patches/ethereum/fastrlp-0.3/src/lib.rs
similarity index 100%
rename from patches/ethereum/secp256k1-30/src/lib.rs
rename to patches/ethereum/fastrlp-0.3/src/lib.rs
diff --git a/patches/ethereum/fastrlp-0.4/Cargo.toml b/patches/ethereum/fastrlp-0.4/Cargo.toml
new file mode 100644
index 00000000..90734124
--- /dev/null
+++ b/patches/ethereum/fastrlp-0.4/Cargo.toml
@@ -0,0 +1,19 @@
+[package]
+name = "fastrlp"
+version = "0.4.99"
+description = "Patch to an empty crate"
+license = "MIT"
+repository = "https://github.com/serai-dex/serai/tree/develop/patches/ethereum/fastrlp-0.4"
+authors = ["Luke Parker <lukeparker5132@gmail.com>"]
+keywords = []
+edition = "2021"
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+
+[workspace]
+
+[features]
+alloc = []
+std = []
diff --git a/patches/ethereum/fastrlp-0.4/src/lib.rs b/patches/ethereum/fastrlp-0.4/src/lib.rs
new file mode 100644
index 00000000..0670b71f
--- /dev/null
+++ b/patches/ethereum/fastrlp-0.4/src/lib.rs
@@ -0,0 +1 @@
+const _NEVER_COMPILED: [(); 0 - 1] = [(); 0 - 1];
diff --git a/patches/ethereum/primitive-types-0.12/Cargo.toml b/patches/ethereum/primitive-types-0.12/Cargo.toml
new file mode 100644
index 00000000..81fe2bdd
--- /dev/null
+++ b/patches/ethereum/primitive-types-0.12/Cargo.toml
@@ -0,0 +1,18 @@
+[package]
+name = "primitive-types"
+version = "0.12.99"
+description = "Patch to an empty crate"
+license = "MIT"
+repository = "https://github.com/serai-dex/serai/tree/develop/patches/ethereum/primitive-types"
+authors = ["Luke Parker <lukeparker5132@gmail.com>"]
+keywords = []
+edition = "2021"
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+
+[workspace]
+
+[features]
+std = []
diff --git a/patches/ethereum/primitive-types-0.12/src/lib.rs b/patches/ethereum/primitive-types-0.12/src/lib.rs
new file mode 100644
index 00000000..0670b71f
--- /dev/null
+++ b/patches/ethereum/primitive-types-0.12/src/lib.rs
@@ -0,0 +1 @@
+const _NEVER_COMPILED: [(); 0 - 1] = [(); 0 - 1];
diff --git a/patches/ethereum/rlp/Cargo.toml b/patches/ethereum/rlp/Cargo.toml
new file mode 100644
index 00000000..dfb1ecd7
--- /dev/null
+++ b/patches/ethereum/rlp/Cargo.toml
@@ -0,0 +1,18 @@
+[package]
+name = "rlp"
+version = "0.5.99"
+description = "Patch to an empty crate"
+license = "MIT"
+repository = "https://github.com/serai-dex/serai/tree/develop/patches/ethereum/rlp"
+authors = ["Luke Parker <lukeparker5132@gmail.com>"]
+keywords = []
+edition = "2021"
+
+[package.metadata.docs.rs]
+all-features = true
+rustdoc-args = ["--cfg", "docsrs"]
+
+[workspace]
+
+[features]
+std = []
diff --git a/patches/ethereum/rlp/src/lib.rs b/patches/ethereum/rlp/src/lib.rs
new file mode 100644
index 00000000..0670b71f
--- /dev/null
+++ b/patches/ethereum/rlp/src/lib.rs
@@ -0,0 +1 @@
+const _NEVER_COMPILED: [(); 0 - 1] = [(); 0 - 1];
diff --git a/patches/ethereum/secp256k1-30/Cargo.toml b/patches/ethereum/secp256k1-0.30/Cargo.toml
similarity index 93%
rename from patches/ethereum/secp256k1-30/Cargo.toml
rename to patches/ethereum/secp256k1-0.30/Cargo.toml
index 52541226..986bfd1c 100644
--- a/patches/ethereum/secp256k1-30/Cargo.toml
+++ b/patches/ethereum/secp256k1-0.30/Cargo.toml
@@ -3,7 +3,7 @@ name = "secp256k1"
 version = "0.30.99"
 description = "Patch to an empty crate"
 license = "MIT"
-repository = "https://github.com/serai-dex/serai/tree/develop/patches/ethereum/secp256k1-30"
+repository = "https://github.com/serai-dex/serai/tree/develop/patches/ethereum/secp256k1-0.30"
 authors = ["Luke Parker <lukeparker5132@gmail.com>"]
 keywords = []
 edition = "2021"
diff --git a/patches/ethereum/secp256k1-0.30/src/lib.rs b/patches/ethereum/secp256k1-0.30/src/lib.rs
new file mode 100644
index 00000000..0670b71f
--- /dev/null
+++ b/patches/ethereum/secp256k1-0.30/src/lib.rs
@@ -0,0 +1 @@
+const _NEVER_COMPILED: [(); 0 - 1] = [(); 0 - 1];