diff --git a/src/flow/adjacencies.rs b/src/flow/adjacencies.rs
new file mode 100644
index 0000000..4f914f3
--- /dev/null
+++ b/src/flow/adjacencies.rs
@@ -0,0 +1,3 @@
+struct Adjacencies {
+
+}
\ No newline at end of file
diff --git a/src/flow/mod.rs b/src/flow/mod.rs
new file mode 100644
index 0000000..c76a6ca
--- /dev/null
+++ b/src/flow/mod.rs
@@ -0,0 +1,12 @@
+use crate::address::Address;
+use crate::edge::Edge;
+use crate::u256::U256;
+
+enum Node {
+    Node(Address),
+    TokenEdge(Address, Address),
+}
+
+fn pseudoNode(edge: Edge) -> Node {
+    Node::TokenEdge(edge.from, edge.to)
+}
\ No newline at end of file
diff --git a/src/io.rs b/src/io.rs
index 5cec6f2..639d18c 100644
--- a/src/io.rs
+++ b/src/io.rs
@@ -4,9 +4,7 @@ use std::fs::File;
 use std::io;
 use std::io::Read;
 
-use crate::address::Address;
-use crate::edge::Edge;
-use crate::u256::U256;
+use crate::types::{Address, Edge, U256};
 
 pub fn read_edges_binary(path: &String) -> Result<HashSet<Edge>, io::Error> {
     let mut f = File::open(path)?;
diff --git a/src/main.rs b/src/main.rs
index 322fe9f..8841ca2 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,6 @@
-mod address;
-mod edge;
+mod flow;
 mod io;
-mod u256;
+mod types;
 
 fn main() {
     let edges = io::read_edges_binary(&String::from("./edges.dat")).expect("Error loading edges.");
diff --git a/src/address.rs b/src/types/address.rs
similarity index 100%
rename from src/address.rs
rename to src/types/address.rs
diff --git a/src/edge.rs b/src/types/edge.rs
similarity index 84%
rename from src/edge.rs
rename to src/types/edge.rs
index 498e0c7..e024dae 100644
--- a/src/edge.rs
+++ b/src/types/edge.rs
@@ -1,5 +1,5 @@
-use crate::address::Address;
-use crate::u256::U256;
+use crate::types::Address;
+use crate::types::U256;
 
 #[derive(Clone, Copy, Debug, Default, Hash, PartialEq, PartialOrd)]
 pub struct Edge {
diff --git a/src/types/mod.rs b/src/types/mod.rs
new file mode 100644
index 0000000..7a8914a
--- /dev/null
+++ b/src/types/mod.rs
@@ -0,0 +1,7 @@
+pub mod address;
+pub mod edge;
+pub mod u256;
+
+pub use address::Address;
+pub use edge::Edge;
+pub use u256::U256;
diff --git a/src/u256.rs b/src/types/u256.rs
similarity index 100%
rename from src/u256.rs
rename to src/types/u256.rs