diff --git a/Cargo.toml b/Cargo.toml
index 9aa4ab6ec..3944e4759 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,115 +11,140 @@ edition = "2021"
 [lib]
 name = "darkfi"
 
-[dependencies.halo2_gadgets]
-git = "https://github.com/parazyd/halo2_gadgets.git"
-rev = "b45c527276bb2309f3b256eb5f45ccdcc5bd8c0f"
-features = ["dev-graph", "test-dependencies"]
-
-# blockchain dependencies
-[dependencies.rocksdb]
-# TODO: Revert to upstream after bd966750ec861d687913d59a9939a1408ac53131 is merged.
-git = "https://github.com/parazyd/rust-rocksdb"
-rev = "bd966750ec861d687913d59a9939a1408ac53131"
-default-features = false
-features = ["zstd"]
-optional = true
-
 [dependencies]
-# Crypto
-halo2 = {version = "=0.1.0-beta.1", features = ["dev-graph", "gadget-traces", "sanity-checks"]}
-incrementalmerkletree = "0.2.0"
-pasta_curves = "0.2.1"
-rand = "0.8.4"
-num-bigint = {version = "0.4.3", features = ["rand", "serde"]}
-blake2b_simd = "1.0.0"
-group = "0.11.0"
-crypto_api_chachapoly = "0.5.0"
-arrayvec = "0.7.2"
-sha2 = "0.9.8"
-
-# Encoding and parsing
-bincode = "1.3.3"
-bs58 = "0.4.0"
-bytes = "1.1.0"
-hex = "0.4.3"
-toml = "0.5.8"
-url = "2.2.2"
-serde_json = "1.0.72"
-serde = {version = "1.0.130", features = ["derive"]}
-
-# Async
-async-std = "1.10.0"
-async-trait = "0.1.51"
-async-channel = "1.6.1"
-native-tls = "0.2.8"
-async-native-tls = "0.4.0"
-async-executor = "1.4.1"
-futures = "0.3.17"
-smol = "1.2.5"
-
-# Utilities
-anyhow = "1.0.49"
-clap = { version = "3.0.0", features = ["derive"] }
-dirs = "4.0.0"
-failure = "0.1.8"
-lazy_static = "1.4.0"
 log = "0.4.14"
-num_cpus = "1.13.0"
-signal-hook = "0.3.10"
-simplelog = "0.11.1"
-subtle = "2.4.1"
 thiserror = "1.0.30"
 
-# Used for Websockets client implementation.
-async-tungstenite = "0.16.0"
-tungstenite = "0.16.0"
+# Async
+async-trait = {version = "0.1.52", optional = true}
+futures = {version = "0.3.19", optional = true}
+smol = {version = "1.2.5", optional = true}
 
-#tui dependencies
-crossbeam-channel = { version = "0.5.1", optional = true}
-libc = { version = "0.2.112", optional = true}
-termion = { version = "1.5.6", optional = true}
+# Encoding
+hex = {version = "0.4.3", optional = true}
+serde = {version = "1.0.133", features = ["derive"], optional = true}
+serde_json = {version = "1.0.74", optional = true}
 
-# node dependencies
-## Used for wallet management.
-sqlx = {version = "0.5.10", features = ["runtime-async-std-native-tls", "sqlite"], optional = true}
-libsqlite3-sys = {version = "0.23.1", features = ["bundled-sqlcipher"],  optional = true }
-## Used for gatewayd network transport.
-zeromq = {version = "0.3.1", default-features = false, features = ["async-std-runtime", "all-transport"],  optional = true }
-signal-hook-async-std = {version = "0.2.1", optional = true}
+# Utilities
+dirs = {version = "4.0.0", optional = true}
 
-[workspace]
-members = ["bin/drk", "bin/darkfid", "bin/gateway"]
-exclude = ["bin/cashier", "bin/ircd", "bin/map"]
+# Misc
+num-bigint = {version = "0.4.3", optional = true}
 
 [features]
-chain = ["rocksdb"]
-node = ["sqlx", "libsqlite3-sys", "zeromq", "signal-hook-async-std"]
-tui = ["termion", "libc", "crossbeam-channel"]
+async-runtime = ["async-trait", "futures", "smol"]
+util = ["async-runtime", "hex", "serde", "serde_json", "dirs",
+    "num-bigint"]
 
-[[example]]
-name = "net"
-path = "example/net.rs"
-required-features = ["node", "chain"]
+# [dependencies.halo2_gadgets]
+# git = "https://github.com/parazyd/halo2_gadgets.git"
+# rev = "b45c527276bb2309f3b256eb5f45ccdcc5bd8c0f"
+# features = ["dev-graph", "test-dependencies"]
 
-[[example]]
-name = "tui"
-path = "example/tui_ex.rs"
-required-features = ["tui"]
+# # blockchain dependencies
+# [dependencies.rocksdb]
+# # TODO: Revert to upstream after bd966750ec861d687913d59a9939a1408ac53131 is merged.
+# git = "https://github.com/parazyd/rust-rocksdb"
+# rev = "bd966750ec861d687913d59a9939a1408ac53131"
+# default-features = false
+# features = ["zstd"]
+# optional = true
 
-[[example]]
-name = "vm"
-path = "example/vm.rs"
+# [dependencies]
+# # Crypto
+# halo2 = {version = "=0.1.0-beta.1", features = ["dev-graph", "gadget-traces", "sanity-checks"]}
+# incrementalmerkletree = "0.2.0"
+# pasta_curves = "0.2.1"
+# rand = "0.8.4"
+# num-bigint = {version = "0.4.3", features = ["rand", "serde"]}
+# blake2b_simd = "1.0.0"
+# group = "0.11.0"
+# crypto_api_chachapoly = "0.5.0"
+# arrayvec = "0.7.2"
+# sha2 = "0.9.8"
 
-[[example]]
-name = "vm_burn"
-path = "example/vm_burn.rs"
+# # Encoding and parsing
+# bincode = "1.3.3"
+# bs58 = "0.4.0"
+# bytes = "1.1.0"
+# hex = "0.4.3"
+# toml = "0.5.8"
+# url = "2.2.2"
+# serde_json = "1.0.72"
+# serde = {version = "1.0.130", features = ["derive"]}
 
-[[example]]
-name = "tx"
-path = "example/tx.rs"
-required-features = ["node"]
+# # Async
+# async-std = "1.10.0"
+# async-trait = "0.1.51"
+# async-channel = "1.6.1"
+# native-tls = "0.2.8"
+# async-native-tls = "0.4.0"
+# async-executor = "1.4.1"
+# futures = "0.3.17"
+# smol = "1.2.5"
 
-[[example]]
-name = "tree"
-path = "example/tree.rs"
+# # Utilities
+# anyhow = "1.0.49"
+# clap = { version = "3.0.0", features = ["derive"] }
+# dirs = "4.0.0"
+# failure = "0.1.8"
+# lazy_static = "1.4.0"
+# log = "0.4.14"
+# num_cpus = "1.13.0"
+# signal-hook = "0.3.10"
+# simplelog = "0.11.1"
+# subtle = "2.4.1"
+# thiserror = "1.0.30"
+
+# # Used for Websockets client implementation.
+# async-tungstenite = "0.16.0"
+# tungstenite = "0.16.0"
+
+# #tui dependencies
+# crossbeam-channel = { version = "0.5.1", optional = true}
+# libc = { version = "0.2.112", optional = true}
+# termion = { version = "1.5.6", optional = true}
+
+# # node dependencies
+# ## Used for wallet management.
+# sqlx = {version = "0.5.10", features = ["runtime-async-std-native-tls", "sqlite"], optional = true}
+# libsqlite3-sys = {version = "0.23.1", features = ["bundled-sqlcipher"],  optional = true }
+# ## Used for gatewayd network transport.
+# zeromq = {version = "0.3.1", default-features = false, features = ["async-std-runtime", "all-transport"],  optional = true }
+# signal-hook-async-std = {version = "0.2.1", optional = true}
+
+# [workspace]
+# members = ["bin/drk", "bin/darkfid", "bin/gateway"]
+# exclude = ["bin/cashier", "bin/ircd", "bin/map"]
+
+# [features]
+# chain = ["rocksdb"]
+# node = ["sqlx", "libsqlite3-sys", "zeromq", "signal-hook-async-std"]
+# tui = ["termion", "libc", "crossbeam-channel"]
+
+# [[example]]
+# name = "net"
+# path = "example/net.rs"
+# required-features = ["node", "chain"]
+
+# [[example]]
+# name = "tui"
+# path = "example/tui_ex.rs"
+# required-features = ["tui"]
+
+# [[example]]
+# name = "vm"
+# path = "example/vm.rs"
+
+# [[example]]
+# name = "vm_burn"
+# path = "example/vm_burn.rs"
+
+# [[example]]
+# name = "tx"
+# path = "example/tx.rs"
+# required-features = ["node"]
+
+# [[example]]
+# name = "tree"
+# path = "example/tree.rs"
diff --git a/src/util/address.rs b/src/crypto/address.rs
similarity index 100%
rename from src/util/address.rs
rename to src/crypto/address.rs
diff --git a/src/util/loader.rs b/src/crypto/loader.rs
similarity index 100%
rename from src/util/loader.rs
rename to src/crypto/loader.rs
diff --git a/src/crypto/token_id.rs b/src/crypto/token_id.rs
new file mode 100644
index 000000000..e9ebb444e
--- /dev/null
+++ b/src/crypto/token_id.rs
@@ -0,0 +1,63 @@
+/// Hash the external token ID and NetworkName param.
+/// If it fails, change the last 4 bytes and hash it again.
+/// Keep repeating until it works.
+pub fn generate_id(tkn_str: &str, network: &NetworkName) -> Result<DrkTokenId> {
+    let mut id_string = network.to_string();
+    id_string.push_str(tkn_str);
+
+    let mut data: Vec<u8> = serialize(&id_string);
+
+    let token_id = match deserialize::<DrkTokenId>(&data) {
+        Ok(v) => v,
+        Err(_) => {
+            let mut counter = 0;
+            loop {
+                data.truncate(28);
+                let serialized_counter = serialize(&counter);
+                data.extend(serialized_counter.iter());
+                let mut hasher = Sha256::new();
+                hasher.update(&data);
+                let hash = hasher.finalize();
+                let token_id = deserialize::<DrkTokenId>(&hash);
+                if token_id.is_err() {
+                    counter += 1;
+                    continue
+                }
+
+                return Ok(token_id.unwrap())
+            }
+        }
+    };
+
+    Ok(token_id)
+}
+
+/// YOLO
+pub fn generate_id2(tkn_str: &str, network: &NetworkName) -> Result<DrkTokenId> {
+    let mut num = 0_u64;
+
+    match network {
+        NetworkName::Solana => {
+            for i in ['s', 'o', 'l'] {
+                num += i as u64;
+            }
+        }
+        NetworkName::Bitcoin => {
+            for i in ['b', 't', 'c'] {
+                num += i as u64;
+            }
+        }
+        NetworkName::Ethereum => {
+            for i in ['e', 't', 'h'] {
+                num += i as u64;
+            }
+        }
+        NetworkName::Empty => unimplemented!(),
+    }
+
+    for i in tkn_str.chars() {
+        num += i as u64;
+    }
+
+    Ok(DrkTokenId::from(num))
+}
diff --git a/src/util/token_list.rs b/src/crypto/token_list.rs
similarity index 79%
rename from src/util/token_list.rs
rename to src/crypto/token_list.rs
index 62e29c9c1..0f8023656 100644
--- a/src/util/token_list.rs
+++ b/src/crypto/token_list.rs
@@ -8,6 +8,8 @@ use crate::{
     Error, Result,
 };
 
+pub const ETH_NATIVE_TOKEN_ID: &str = "0x0000000000000000000000000000000000000000";
+
 #[derive(Debug, Clone)]
 pub struct TokenList {
     tokens: Vec<Value>,
@@ -119,6 +121,65 @@ impl DrkTokenList {
     }
 }
 
+pub fn assign_id(
+    network: &NetworkName,
+    token: &str,
+    sol_tokenlist: &TokenList,
+    eth_tokenlist: &TokenList,
+    btc_tokenlist: &TokenList,
+) -> Result<String> {
+    match network {
+        NetworkName::Solana => {
+            // (== 44) can represent a Solana base58 token mint address
+            if token.len() == 44 {
+                Ok(token.to_string())
+            } else {
+                let tok_lower = token.to_lowercase();
+                symbol_to_id(&tok_lower, sol_tokenlist)
+            }
+        }
+        NetworkName::Bitcoin => {
+            if token.len() == 34 {
+                Ok(token.to_string())
+            } else {
+                let tok_lower = token.to_lowercase();
+                symbol_to_id(&tok_lower, btc_tokenlist)
+            }
+        }
+        NetworkName::Ethereum => {
+            // (== 42) can represent a erc20 token mint address
+            if token.len() == 42 {
+                Ok(token.to_string())
+            } else if token == "eth" {
+                Ok(ETH_NATIVE_TOKEN_ID.to_string())
+            } else {
+                let tok_lower = token.to_lowercase();
+                symbol_to_id(&tok_lower, eth_tokenlist)
+            }
+        }
+        _ => Err(Error::NotSupportedNetwork),
+    }
+}
+
+pub fn symbol_to_id(token: &str, tokenlist: &TokenList) -> Result<String> {
+    let vec: Vec<char> = token.chars().collect();
+    let mut counter = 0;
+    for c in vec {
+        if c.is_alphabetic() {
+            counter += 1;
+        }
+    }
+    if counter == token.len() {
+        if let Some(id) = tokenlist.search_id(token)? {
+            Ok(id)
+        } else {
+            Err(Error::TokenParseError)
+        }
+    } else {
+        Ok(token.to_string())
+    }
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;
diff --git a/src/error.rs b/src/error.rs
new file mode 100644
index 000000000..bec5a81a0
--- /dev/null
+++ b/src/error.rs
@@ -0,0 +1,258 @@
+pub type Result<T> = std::result::Result<T, Error>;
+
+#[derive(Debug, Clone, thiserror::Error)]
+pub enum Error {
+    #[error("io error: `{0:?}`")]
+    Io(std::io::ErrorKind),
+    // #[error("Infallible Error: `{0}`")]
+    // InfallibleError(String),
+
+    // #[error("Cannot find home directory")]
+    // PathNotFound,
+    #[cfg(feature = "util")]
+    /// VarInt was encoded in a non-minimal way
+    #[error("non-minimal varint")]
+    NonMinimalVarInt,
+
+    #[cfg(feature = "util")]
+    #[error("parse failed: `{0}`")]
+    ParseFailed(&'static str),
+    // #[error("decode failed: `{0}`")]
+    // DecodeError(&'static str),
+    // #[error("encode failed: `{0}`")]
+    // EncodeError(&'static str),
+    #[error(transparent)]
+    ParseIntError(#[from] std::num::ParseIntError),
+
+    #[cfg(feature = "util")]
+    #[error(transparent)]
+    ParseBigIntError(#[from] num_bigint::ParseBigIntError),
+
+    // #[error(transparent)]
+    // ParseFloatError(#[from] std::num::ParseFloatError),
+    // #[error(transparent)]
+    // FromHexError(#[from] hex::FromHexError),
+    // #[error("Url parse error `{0}`")]
+    // UrlParseError(String),
+    // #[error("No url found")]
+    // NoUrlFound,
+    // #[error("Malformed packet")]
+    // MalformedPacket,
+    // #[error(transparent)]
+    // AddrParseError(#[from] std::net::AddrParseError),
+    // #[error(transparent)]
+    // Base58EncodeError(#[from] bs58::encode::Error),
+    // #[error(transparent)]
+    // Base58DecodeError(#[from] bs58::decode::Error),
+    #[error(transparent)]
+    Utf8Error(#[from] std::string::FromUtf8Error),
+
+    #[error(transparent)]
+    StrUtf8Error(#[from] std::str::Utf8Error),
+
+    // #[error("TryInto error")]
+    // TryIntoError,
+    // #[error("TryFrom error")]
+    // TryFromError,
+    // #[error(transparent)]
+    // TryFromBigIntError(#[from] num_bigint::TryFromBigIntError<num_bigint::BigUint>),
+    #[cfg(feature = "util")]
+    #[error("Json serialization error: `{0}`")]
+    SerdeJsonError(String),
+    // #[error(transparent)]
+    // TomlDeserializeError(#[from] toml::de::Error),
+    // #[error(transparent)]
+    // TomlSerializeError(#[from] toml::ser::Error),
+    // #[error("Bincode serialization error: `{0}`")]
+    // BincodeError(String),
+
+    // /// Contract
+    // #[error("Bad variable ref type byte")]
+    // BadVariableRefType,
+    // #[error("Bad operation type byte")]
+    // BadOperationType,
+    // #[error("Bad constraint type byte")]
+    // BadConstraintType,
+    // #[error("Invalid param name")]
+    // InvalidParamName,
+    // #[error("Invalid param type")]
+    // InvalidParamType,
+    // #[error("Missing params")]
+    // MissingParams,
+    // #[error("Contract is poorly defined")]
+    // BadContract,
+    // #[error("Operation failed")]
+    // OperationFailed,
+    // #[error("PLONK error: `{0}`")]
+    // PlonkError(String),
+    // #[error("Unable to decrypt mint note")]
+    // NoteDecryptionFailed,
+
+    // #[cfg(feature = "node")]
+    // #[error(transparent)]
+    // VerifyFailed(#[from] crate::node::state::VerifyFailed),
+    // #[error("MerkleTree is full")]
+    // TreeFull,
+
+    // /// Service
+    // #[error("Services Error: `{0}`")]
+    // ServicesError(&'static str),
+    // #[error("Client failed: `{0}`")]
+    // ClientFailed(String),
+    // #[error("Cashier failed: `{0}`")]
+    // CashierError(String),
+    // #[error("ZmqError: `{0}`")]
+    // ZmqError(String),
+
+    // /// Database/Sql errors
+    // #[error("Rocksdb error: `{0}`")]
+    // RocksdbError(String),
+    // #[error("sqlx error: `{0}`")]
+    // SqlxError(String),
+    // #[error("SlabsStore Error: `{0}`")]
+    // SlabsStore(String),
+
+    // /// RPC errors
+    // #[error("JsonRpc Error: `{0}`")]
+    // JsonRpcError(String),
+    #[error("Not supported network")]
+    NotSupportedNetwork,
+
+    #[error("Not supported token")]
+    NotSupportedToken,
+
+    #[error("Could not parse token parameter")]
+    TokenParseError,
+
+    // #[error("Cannot parse network parameter")]
+    // NetworkParseError,
+    // #[error("Async_Native_TLS error: `{0}`")]
+    // AsyncNativeTlsError(String),
+    // #[error("TungsteniteError: `{0}`")]
+    // TungsteniteError(String),
+
+    // /// Network
+    // #[error("Connection failed")]
+    // ConnectFailed,
+    // #[error("Connection timed out")]
+    // ConnectTimeout,
+    // #[error("Channel stopped")]
+    // ChannelStopped,
+    // #[error("Channel timed out")]
+    // ChannelTimeout,
+    // #[error("Service stopped")]
+    // ServiceStopped,
+
+    // /// Util
+    // #[error("No config file detected. Please create one.")]
+    // ConfigNotFound,
+    #[cfg(feature = "util")]
+    #[error("No keypair file detected.")]
+    KeypairPathNotFound,
+    // #[error("SetLoggerError")]
+    // SetLoggerError,
+    // #[error("Async_channel sender error")]
+    // AsyncChannelSenderError,
+    // #[error(transparent)]
+    // AsyncChannelReceiverError(#[from] async_channel::RecvError),
+
+    // /// Keypari & Address
+    // #[error("Error converting Address to PublicKey")]
+    // AddressToPublicKeyError,
+    // #[error("Error converting bytes to PublicKey")]
+    // PublicKeyFromBytes,
+    // #[error("Error converting bytes to SecretKey")]
+    // SecretKeyFromBytes,
+    // #[error("Invalid Address")]
+    // InvalidAddress,
+}
+
+// #[cfg(feature = "node")]
+// impl From<zeromq::ZmqError> for Error {
+// fn from(err: zeromq::ZmqError) -> Error {
+// Error::ZmqError(err.to_string())
+// }
+// }
+
+// #[cfg(feature = "chain")]
+// impl From<rocksdb::Error> for Error {
+// fn from(err: rocksdb::Error) -> Error {
+// Error::RocksdbError(err.to_string())
+// }
+// }
+
+// #[cfg(feature = "node")]
+// impl From<sqlx::error::Error> for Error {
+// fn from(err: sqlx::error::Error) -> Error {
+// Error::SqlxError(err.to_string())
+// }
+// }
+
+#[cfg(feature = "util")]
+impl From<serde_json::Error> for Error {
+    fn from(err: serde_json::Error) -> Error {
+        Error::SerdeJsonError(err.to_string())
+    }
+}
+
+#[cfg(feature = "util")]
+impl From<std::io::Error> for Error {
+    fn from(err: std::io::Error) -> Error {
+        Error::Io(err.kind())
+    }
+}
+
+// impl<T> From<async_channel::SendError<T>> for Error {
+// fn from(_err: async_channel::SendError<T>) -> Error {
+// Error::AsyncChannelSenderError
+// }
+// }
+
+// impl From<async_native_tls::Error> for Error {
+// fn from(err: async_native_tls::Error) -> Error {
+// Error::AsyncNativeTlsError(err.to_string())
+// }
+// }
+
+// impl From<url::ParseError> for Error {
+// fn from(err: url::ParseError) -> Error {
+// Error::UrlParseError(err.to_string())
+// }
+// }
+
+// #[cfg(feature = "node")]
+// impl From<crate::node::client::ClientFailed> for Error {
+// fn from(err: crate::node::client::ClientFailed) -> Error {
+// Error::ClientFailed(err.to_string())
+// }
+// }
+
+// impl From<log::SetLoggerError> for Error {
+// fn from(_err: log::SetLoggerError) -> Error {
+// Error::SetLoggerError
+// }
+// }
+
+// impl From<tungstenite::Error> for Error {
+// fn from(err: tungstenite::Error) -> Error {
+// Error::TungsteniteError(err.to_string())
+// }
+// }
+
+// impl From<halo2::plonk::Error> for Error {
+// fn from(err: halo2::plonk::Error) -> Error {
+// Error::PlonkError(format!("{:?}", err))
+// }
+// }
+
+// impl From<Box<bincode::ErrorKind>> for Error {
+// fn from(err: Box<bincode::ErrorKind>) -> Error {
+// Error::BincodeError(err.to_string())
+// }
+// }
+
+// impl From<std::convert::Infallible> for Error {
+// fn from(err: std::convert::Infallible) -> Error {
+// Error::InfallibleError(err.to_string())
+// }
+// }
diff --git a/src/lib.rs b/src/lib.rs
index 82c46da5a..bc0151fe5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,8 +1,22 @@
+pub mod error;
+pub use error::{Error, Result};
+
+#[cfg(feature = "cli")]
 pub mod cli;
+
+#[cfg(feature = "crypto")]
 pub mod crypto;
+
+#[cfg(feature = "net")]
 pub mod net;
+
+#[cfg(feature = "system")]
 pub mod system;
+
+#[cfg(feature = "crypto")]
 pub mod types;
+
+#[cfg(feature = "crypto")]
 pub mod zk;
 
 #[cfg(feature = "node")]
@@ -17,10 +31,8 @@ pub mod tui;
 #[cfg(feature = "chain")]
 pub mod chain;
 
+#[cfg(feature = "util")]
 pub mod util;
 
-pub use util::{
-    error,
-    error::{Error, Result},
-    serial,
-};
+#[cfg(feature = "rpc")]
+pub mod rpc;
diff --git a/src/util/rpc/jsonrpc.rs b/src/rpc/jsonrpc.rs
similarity index 100%
rename from src/util/rpc/jsonrpc.rs
rename to src/rpc/jsonrpc.rs
diff --git a/src/util/rpc/mod.rs b/src/rpc/mod.rs
similarity index 100%
rename from src/util/rpc/mod.rs
rename to src/rpc/mod.rs
diff --git a/src/util/rpc/rpcserver.rs b/src/rpc/rpcserver.rs
similarity index 100%
rename from src/util/rpc/rpcserver.rs
rename to src/rpc/rpcserver.rs
diff --git a/src/util/rpc/websockets.rs b/src/rpc/websockets.rs
similarity index 100%
rename from src/util/rpc/websockets.rs
rename to src/rpc/websockets.rs
diff --git a/src/util/async_serial.rs b/src/util/async_serial.rs
index feeac1e95..421326755 100644
--- a/src/util/async_serial.rs
+++ b/src/util/async_serial.rs
@@ -1,6 +1,7 @@
 use futures::prelude::*;
 
-use super::{endian, serial::VarInt, Error, Result};
+use super::{endian, serial::VarInt};
+use crate::{Error, Result};
 
 impl VarInt {
     pub async fn encode_async<W: AsyncWrite + Unpin>(&self, stream: &mut W) -> Result<usize> {
diff --git a/src/util/error.rs b/src/util/error.rs
deleted file mode 100644
index 2a74aad1a..000000000
--- a/src/util/error.rs
+++ /dev/null
@@ -1,246 +0,0 @@
-pub type Result<T> = std::result::Result<T, Error>;
-
-#[derive(Debug, Clone, thiserror::Error)]
-pub enum Error {
-    #[error("io error: `{0:?}`")]
-    Io(std::io::ErrorKind),
-
-    #[error("Infallible Error: `{0}`")]
-    InfallibleError(String),
-
-    #[error("Cannot find home directory")]
-    PathNotFound,
-    /// VarInt was encoded in a non-minimal way
-    #[error("non-minimal varint")]
-    NonMinimalVarInt,
-
-    /// Parsing And Encode/Decode errors
-    #[error("parse failed: `{0}`")]
-    ParseFailed(&'static str),
-    #[error("decode failed: `{0}`")]
-    DecodeError(&'static str),
-    #[error("encode failed: `{0}`")]
-    EncodeError(&'static str),
-    #[error(transparent)]
-    ParseIntError(#[from] std::num::ParseIntError),
-    #[error(transparent)]
-    ParseBigIntError(#[from] num_bigint::ParseBigIntError),
-    #[error(transparent)]
-    ParseFloatError(#[from] std::num::ParseFloatError),
-    #[error(transparent)]
-    FromHexError(#[from] hex::FromHexError),
-    #[error("Url parse error `{0}`")]
-    UrlParseError(String),
-    #[error("No url found")]
-    NoUrlFound,
-    #[error("Malformed packet")]
-    MalformedPacket,
-    #[error(transparent)]
-    AddrParseError(#[from] std::net::AddrParseError),
-    #[error(transparent)]
-    Base58EncodeError(#[from] bs58::encode::Error),
-    #[error(transparent)]
-    Base58DecodeError(#[from] bs58::decode::Error),
-    #[error(transparent)]
-    Utf8Error(#[from] std::string::FromUtf8Error),
-    #[error(transparent)]
-    StrUtf8Error(#[from] std::str::Utf8Error),
-    #[error("TryInto error")]
-    TryIntoError,
-    #[error("TryFrom error")]
-    TryFromError,
-    #[error(transparent)]
-    TryFromBigIntError(#[from] num_bigint::TryFromBigIntError<num_bigint::BigUint>),
-    #[error("Json serialization error: `{0}`")]
-    SerdeJsonError(String),
-    #[error(transparent)]
-    TomlDeserializeError(#[from] toml::de::Error),
-    #[error(transparent)]
-    TomlSerializeError(#[from] toml::ser::Error),
-    #[error("Bincode serialization error: `{0}`")]
-    BincodeError(String),
-
-    /// Contract
-    #[error("Bad variable ref type byte")]
-    BadVariableRefType,
-    #[error("Bad operation type byte")]
-    BadOperationType,
-    #[error("Bad constraint type byte")]
-    BadConstraintType,
-    #[error("Invalid param name")]
-    InvalidParamName,
-    #[error("Invalid param type")]
-    InvalidParamType,
-    #[error("Missing params")]
-    MissingParams,
-    #[error("Contract is poorly defined")]
-    BadContract,
-    #[error("Operation failed")]
-    OperationFailed,
-    #[error("PLONK error: `{0}`")]
-    PlonkError(String),
-    #[error("Unable to decrypt mint note")]
-    NoteDecryptionFailed,
-
-    #[cfg(feature = "node")]
-    #[error(transparent)]
-    VerifyFailed(#[from] crate::node::state::VerifyFailed),
-    #[error("MerkleTree is full")]
-    TreeFull,
-
-    /// Service
-    #[error("Services Error: `{0}`")]
-    ServicesError(&'static str),
-    #[error("Client failed: `{0}`")]
-    ClientFailed(String),
-    #[error("Cashier failed: `{0}`")]
-    CashierError(String),
-    #[error("ZmqError: `{0}`")]
-    ZmqError(String),
-
-    /// Database/Sql errors
-    #[error("Rocksdb error: `{0}`")]
-    RocksdbError(String),
-    #[error("sqlx error: `{0}`")]
-    SqlxError(String),
-    #[error("SlabsStore Error: `{0}`")]
-    SlabsStore(String),
-
-    /// RPC errors
-    #[error("JsonRpc Error: `{0}`")]
-    JsonRpcError(String),
-    #[error("Not supported network")]
-    NotSupportedNetwork,
-    #[error("Not supported token")]
-    NotSupportedToken,
-    #[error("Could not parse token parameter")]
-    TokenParseError,
-    #[error("Cannot parse network parameter")]
-    NetworkParseError,
-    #[error("Async_Native_TLS error: `{0}`")]
-    AsyncNativeTlsError(String),
-    #[error("TungsteniteError: `{0}`")]
-    TungsteniteError(String),
-
-    /// Network
-    #[error("Connection failed")]
-    ConnectFailed,
-    #[error("Connection timed out")]
-    ConnectTimeout,
-    #[error("Channel stopped")]
-    ChannelStopped,
-    #[error("Channel timed out")]
-    ChannelTimeout,
-    #[error("Service stopped")]
-    ServiceStopped,
-
-    /// Util
-    #[error("No config file detected. Please create one.")]
-    ConfigNotFound,
-    #[error("No keypair file detected.")]
-    KeypairPathNotFound,
-    #[error("SetLoggerError")]
-    SetLoggerError,
-    #[error("Async_channel sender error")]
-    AsyncChannelSenderError,
-    #[error(transparent)]
-    AsyncChannelReceiverError(#[from] async_channel::RecvError),
-
-    /// Keypari & Address
-    #[error("Error converting Address to PublicKey")]
-    AddressToPublicKeyError,
-    #[error("Error converting bytes to PublicKey")]
-    PublicKeyFromBytes,
-    #[error("Error converting bytes to SecretKey")]
-    SecretKeyFromBytes,
-    #[error("Invalid Address")]
-    InvalidAddress,
-}
-
-#[cfg(feature = "node")]
-impl From<zeromq::ZmqError> for Error {
-    fn from(err: zeromq::ZmqError) -> Error {
-        Error::ZmqError(err.to_string())
-    }
-}
-
-#[cfg(feature = "chain")]
-impl From<rocksdb::Error> for Error {
-    fn from(err: rocksdb::Error) -> Error {
-        Error::RocksdbError(err.to_string())
-    }
-}
-
-#[cfg(feature = "node")]
-impl From<sqlx::error::Error> for Error {
-    fn from(err: sqlx::error::Error) -> Error {
-        Error::SqlxError(err.to_string())
-    }
-}
-
-impl From<serde_json::Error> for Error {
-    fn from(err: serde_json::Error) -> Error {
-        Error::SerdeJsonError(err.to_string())
-    }
-}
-
-impl From<std::io::Error> for Error {
-    fn from(err: std::io::Error) -> Error {
-        Error::Io(err.kind())
-    }
-}
-
-impl<T> From<async_channel::SendError<T>> for Error {
-    fn from(_err: async_channel::SendError<T>) -> Error {
-        Error::AsyncChannelSenderError
-    }
-}
-
-impl From<async_native_tls::Error> for Error {
-    fn from(err: async_native_tls::Error) -> Error {
-        Error::AsyncNativeTlsError(err.to_string())
-    }
-}
-
-impl From<url::ParseError> for Error {
-    fn from(err: url::ParseError) -> Error {
-        Error::UrlParseError(err.to_string())
-    }
-}
-
-#[cfg(feature = "node")]
-impl From<crate::node::client::ClientFailed> for Error {
-    fn from(err: crate::node::client::ClientFailed) -> Error {
-        Error::ClientFailed(err.to_string())
-    }
-}
-
-impl From<log::SetLoggerError> for Error {
-    fn from(_err: log::SetLoggerError) -> Error {
-        Error::SetLoggerError
-    }
-}
-
-impl From<tungstenite::Error> for Error {
-    fn from(err: tungstenite::Error) -> Error {
-        Error::TungsteniteError(err.to_string())
-    }
-}
-
-impl From<halo2::plonk::Error> for Error {
-    fn from(err: halo2::plonk::Error) -> Error {
-        Error::PlonkError(format!("{:?}", err))
-    }
-}
-
-impl From<Box<bincode::ErrorKind>> for Error {
-    fn from(err: Box<bincode::ErrorKind>) -> Error {
-        Error::BincodeError(err.to_string())
-    }
-}
-
-impl From<std::convert::Infallible> for Error {
-    fn from(err: std::convert::Infallible) -> Error {
-        Error::InfallibleError(err.to_string())
-    }
-}
diff --git a/src/util/mod.rs b/src/util/mod.rs
index a43473535..b19a07340 100644
--- a/src/util/mod.rs
+++ b/src/util/mod.rs
@@ -1,23 +1,12 @@
-pub mod address;
 pub mod async_serial;
 pub mod async_util;
 pub mod endian;
-pub mod error;
-pub mod loader;
 pub mod net_name;
 pub mod parse;
 pub mod path;
-pub mod rpc;
 pub mod serial;
-pub mod token_list;
 
 pub use async_util::sleep;
-pub use loader::ContractLoader;
 pub use net_name::NetworkName;
-pub use parse::{assign_id, decode_base10, encode_base10, generate_id, generate_id2};
+pub use parse::{decode_base10, encode_base10};
 pub use path::{expand_path, join_config_path, load_keypair_to_str};
-pub use token_list::{DrkTokenList, TokenList};
-
-pub use address::Address;
-
-pub use error::{Error, Result};
diff --git a/src/util/net_name.rs b/src/util/net_name.rs
index e58f5d81a..d540b4c90 100644
--- a/src/util/net_name.rs
+++ b/src/util/net_name.rs
@@ -3,7 +3,7 @@ use std::str::FromStr;
 use serde::{Deserialize, Serialize};
 
 use crate::{
-    serial::{Decodable, Encodable},
+    util::serial::{Decodable, Encodable},
     Result,
 };
 
diff --git a/src/util/parse.rs b/src/util/parse.rs
index 1f11c6eb6..81c75c877 100644
--- a/src/util/parse.rs
+++ b/src/util/parse.rs
@@ -1,138 +1,8 @@
 use std::{iter::FromIterator, str::FromStr};
 
 use num_bigint::BigUint;
-use sha2::{Digest, Sha256};
 
-use crate::{
-    serial::{deserialize, serialize},
-    types::*,
-    util::{NetworkName, TokenList},
-    Error, Result,
-};
-
-pub const ETH_NATIVE_TOKEN_ID: &str = "0x0000000000000000000000000000000000000000";
-
-// hash the external token ID and NetworkName param.
-// if fails, change the last 4 bytes and hash it again. keep repeating until it works.
-pub fn generate_id(tkn_str: &str, network: &NetworkName) -> Result<DrkTokenId> {
-    let mut id_string = network.to_string();
-
-    id_string.push_str(tkn_str);
-
-    let mut data: Vec<u8> = serialize(&id_string);
-
-    let token_id = match deserialize::<DrkTokenId>(&data) {
-        Ok(v) => v,
-        Err(_) => {
-            let mut counter = 0;
-            loop {
-                data.truncate(28);
-                let serialized_counter = serialize(&counter);
-                data.extend(serialized_counter.iter());
-                let mut hasher = Sha256::new();
-                hasher.update(&data);
-                let hash = hasher.finalize();
-                let token_id = deserialize::<DrkTokenId>(&hash);
-                if token_id.is_err() {
-                    counter += 1;
-                    continue
-                }
-                return Ok(token_id.unwrap())
-            }
-        }
-    };
-
-    Ok(token_id)
-}
-
-// YOLO
-pub fn generate_id2(tkn_str: &str, network: &NetworkName) -> Result<DrkTokenId> {
-    let mut num = 0_u64;
-
-    match network {
-        NetworkName::Solana => {
-            for i in ['s', 'o', 'l'] {
-                num += i as u64;
-            }
-        }
-        NetworkName::Bitcoin => {
-            for i in ['b', 't', 'c'] {
-                num += i as u64;
-            }
-        }
-        NetworkName::Ethereum => {
-            for i in ['e', 't', 'h'] {
-                num += i as u64;
-            }
-        }
-        NetworkName::Empty => unimplemented!(),
-    }
-
-    for i in tkn_str.chars() {
-        num += i as u64;
-    }
-
-    Ok(DrkTokenId::from(num))
-}
-
-pub fn assign_id(
-    network: &NetworkName,
-    token: &str,
-    sol_tokenlist: &TokenList,
-    eth_tokenlist: &TokenList,
-    btc_tokenlist: &TokenList,
-) -> Result<String> {
-    match network {
-        NetworkName::Solana => {
-            // (== 44) can represent a Solana base58 token mint address
-            if token.len() == 44 {
-                Ok(token.to_string())
-            } else {
-                let tok_lower = token.to_lowercase();
-                symbol_to_id(&tok_lower, sol_tokenlist)
-            }
-        }
-        NetworkName::Bitcoin => {
-            if token.len() == 34 {
-                Ok(token.to_string())
-            } else {
-                let tok_lower = token.to_lowercase();
-                symbol_to_id(&tok_lower, btc_tokenlist)
-            }
-        }
-        NetworkName::Ethereum => {
-            // (== 42) can represent a erc20 token mint address
-            if token.len() == 42 {
-                Ok(token.to_string())
-            } else if token == "eth" {
-                Ok(ETH_NATIVE_TOKEN_ID.to_string())
-            } else {
-                let tok_lower = token.to_lowercase();
-                symbol_to_id(&tok_lower, eth_tokenlist)
-            }
-        }
-        _ => Err(Error::NotSupportedNetwork),
-    }
-}
-
-pub fn symbol_to_id(token: &str, tokenlist: &TokenList) -> Result<String> {
-    let vec: Vec<char> = token.chars().collect();
-    let mut counter = 0;
-    for c in vec {
-        if c.is_alphabetic() {
-            counter += 1;
-        }
-    }
-    if counter == token.len() {
-        if let Some(id) = tokenlist.search_id(token)? {
-            Ok(id)
-        } else {
-            Err(Error::TokenParseError)
-        }
-    } else {
-        Ok(token.to_string())
-    }
-}
+use crate::{Error, Result};
 
 fn is_digit(c: char) -> bool {
     ('0'..='9').contains(&c)
diff --git a/src/util/serial.rs b/src/util/serial.rs
index a873ba117..2c5134c68 100644
--- a/src/util/serial.rs
+++ b/src/util/serial.rs
@@ -8,10 +8,8 @@ use std::{
 
 use num_bigint::BigUint;
 
-use super::{
-    endian,
-    error::{Error, Result},
-};
+use super::endian;
+use crate::{Error, Result};
 
 /// Encode an object into a vector
 pub fn serialize<T: Encodable + ?Sized>(data: &T) -> Vec<u8> {