diff --git a/.github/workflows/push.yml b/.github/workflows/push.yml
index 27d3e00f..9e94e301 100644
--- a/.github/workflows/push.yml
+++ b/.github/workflows/push.yml
@@ -6,6 +6,8 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v1
+      - name: Install Protoc
+        uses: arduino/setup-protoc@v1
       - uses: actions-rs/toolchain@v1
         with:
             toolchain: nightly
diff --git a/Cargo.toml b/Cargo.toml
index dd117aad..6e41f1af 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,3 +6,12 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+libp2p-core = "0.36"
+either = "1.8"
+tempdir = "0.3"
+bytesize = "1.1"
+
+subspace-core-primitives = { git = "https://github.com/subspace/subspace", rev = "8007a0acd57064264aa03a8c71eb1c9cc9466994" }
+
+[dev-dependencies]
+tokio = { version = "1.21", features = ["rt-multi-thread", "macros"] }
diff --git a/examples/simple.rs b/examples/simple.rs
new file mode 100644
index 00000000..440b6076
--- /dev/null
+++ b/examples/simple.rs
@@ -0,0 +1,77 @@
+use bytesize::ByteSize;
+use subspace_sdk::{Farmer, Network, Node, NodeMode, PlotDescription, PublicKey};
+
+#[tokio::main]
+async fn main() {
+    let mut node: Node = Node::builder()
+        .mode(NodeMode::Full)
+        .network(Network::Gemini2a)
+        .name("i1i1")
+        .port(1337)
+        .build("node")
+        .await
+        .expect("Failed to init a node");
+
+    node.sync().await;
+
+    let reward_address = PublicKey::from([0; 32]);
+    let mut farmer: Farmer = Farmer::builder()
+        .ws_rpc("127.0.0.1:9955".parse().unwrap())
+        .listen_on("/ip4/0.0.0.0/tcp/40333".parse().unwrap())
+        .build(
+            reward_address,
+            node.clone(),
+            PlotDescription::new("plot", ByteSize::gb(10)),
+        )
+        .await
+        .expect("Failed to init a farmer");
+
+    farmer.sync().await;
+
+    farmer
+        .on_solution(|solution| async move {
+            eprintln!("Found solution: {solution:?}");
+        })
+        .await;
+    node.on_block(|block| async move {
+        eprintln!("New block: {block:?}");
+    })
+    .await;
+
+    farmer.start_farming().await;
+
+    dbg!(node.get_info().await);
+    dbg!(farmer.get_info().await);
+
+    farmer.stop_farming().await;
+    farmer.close().await;
+    node.close().await;
+
+    // Restarting
+    let mut node = Node::builder()
+        .mode(NodeMode::Full)
+        .network(Network::Gemini2a)
+        .build("node")
+        .await
+        .expect("Failed to init a node");
+    node.sync().await;
+
+    let mut farmer = Farmer::builder()
+        .build(
+            reward_address,
+            node.clone(),
+            PlotDescription::new("plot", ByteSize::gb(10)),
+        )
+        .await
+        .expect("Failed to init a farmer");
+
+    farmer.sync().await;
+    farmer.start_farming().await;
+
+    // Delete everything
+    for plot in farmer.plots().await {
+        plot.delete().await;
+    }
+    farmer.wipe().await;
+    node.wipe().await;
+}
diff --git a/src/farmer.rs b/src/farmer.rs
new file mode 100644
index 00000000..8f53a05c
--- /dev/null
+++ b/src/farmer.rs
@@ -0,0 +1,128 @@
+use std::{io, net::SocketAddr, path::PathBuf};
+
+use bytesize::ByteSize;
+use either::Either;
+use libp2p_core::multiaddr::Multiaddr;
+use tempdir::TempDir;
+
+use crate::{Node, PublicKey};
+
+// TODO: Should it be non-exhaustive?
+pub struct PlotDescription {
+    pub directory: Either<PathBuf, TempDir>,
+    pub space_pledged: ByteSize,
+}
+
+impl PlotDescription {
+    // TODO: should we check that plot is valid at this stage?
+    // Or it can be literally a description of a plot
+    pub fn new(directory: impl Into<PathBuf>, space_pledged: ByteSize) -> Self {
+        Self {
+            directory: Either::Left(directory.into()),
+            space_pledged,
+        }
+    }
+
+    pub fn with_tempdir(space_pledged: ByteSize) -> io::Result<Self> {
+        TempDir::new("plot")
+            .map(Either::Right)
+            .map(|directory| Self {
+                directory,
+                space_pledged,
+            })
+    }
+}
+
+#[derive(Default)]
+pub struct Builder {
+    listen_on: Option<Multiaddr>,
+    ws_rpc: Option<SocketAddr>,
+}
+
+impl Builder {
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    pub fn listen_on(mut self, multiaddr: Multiaddr) -> Self {
+        self.listen_on = Some(multiaddr);
+        self
+    }
+
+    pub fn ws_rpc(mut self, ws_rpc: SocketAddr) -> Self {
+        self.ws_rpc = Some(ws_rpc);
+        self
+    }
+
+    /// It supposed to open node at the supplied location
+    // TODO: Should we just require multiple plots?
+    pub async fn build(
+        self,
+        reward_address: PublicKey,
+        node: Node,
+        plot: PlotDescription,
+    ) -> Result<Farmer, ()> {
+        let _ = (reward_address, node, plot);
+        todo!()
+    }
+}
+
+pub struct Farmer {
+    _ensure_cant_construct: (),
+}
+
+#[derive(Debug)]
+#[non_exhaustive]
+pub struct Info {
+    pub version: String,
+    pub reward_address: PublicKey,
+    pub dsn_peers: u64,
+    pub space_pledged: ByteSize,
+}
+
+#[derive(Debug)]
+pub struct Solution {
+    _ensure_cant_construct: (),
+}
+
+pub struct Plot {
+    _ensure_cant_construct: (),
+}
+
+impl Plot {
+    pub async fn delete(&mut self) {}
+}
+
+impl Farmer {
+    pub fn builder() -> Builder {
+        Builder::new()
+    }
+
+    pub async fn sync(&mut self) {}
+
+    pub async fn start_farming(&mut self) {}
+
+    pub async fn stop_farming(&mut self) {}
+
+    pub async fn get_info(&mut self) -> Info {
+        todo!()
+    }
+
+    pub async fn on_solution<H, F>(&mut self, on_solution: H)
+    where
+        H: Clone + Send + Sync + 'static + FnMut(Solution) -> F,
+        F: Send + 'static + std::future::Future<Output = ()>,
+    {
+        let _ = on_solution;
+    }
+
+    pub async fn plots(&mut self) -> &mut [Plot] {
+        todo!()
+    }
+
+    // Stops farming, closes plots, and sends signal to the node
+    pub async fn close(self) {}
+
+    // Runs `.close()` and also wipes farmer's state
+    pub async fn wipe(self) {}
+}
diff --git a/src/lib.rs b/src/lib.rs
index 7d12d9af..e5bfd7c0 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -1,14 +1,25 @@
-pub fn add(left: usize, right: usize) -> usize {
-    left + right
-}
+pub mod farmer;
+pub mod node;
+
+use std::path::PathBuf;
 
-#[cfg(test)]
-mod tests {
-    use super::*;
+pub use farmer::{
+    Builder as FarmerBuilder, Farmer, Info as NodeInfo, Plot, PlotDescription, Solution,
+};
+pub use node::{Builder as NodeBuilder, Info as FarmerInfo, Mode as NodeMode, Network, Node};
+pub use subspace_core_primitives::PublicKey;
+
+#[derive(Default)]
+#[non_exhaustive]
+pub enum Directory {
+    #[default]
+    Default,
+    Tmp,
+    Custom(PathBuf),
+}
 
-    #[test]
-    fn it_works() {
-        let result = add(2, 2);
-        assert_eq!(result, 4);
+impl<P: Into<PathBuf>> From<P> for Directory {
+    fn from(path: P) -> Self {
+        Self::Custom(path.into())
     }
 }
diff --git a/src/node.rs b/src/node.rs
new file mode 100644
index 00000000..9ebb0814
--- /dev/null
+++ b/src/node.rs
@@ -0,0 +1,109 @@
+use crate::Directory;
+
+#[non_exhaustive]
+#[derive(Debug, Default)]
+pub enum Mode {
+    #[default]
+    Full,
+}
+
+#[non_exhaustive]
+#[derive(Debug, Default)]
+pub enum Network {
+    #[default]
+    Gemini2a,
+    // TODO: put proper type here
+    Custom(std::convert::Infallible),
+}
+
+#[derive(Default)]
+pub struct Builder {
+    mode: Mode,
+    network: Network,
+    name: Option<String>,
+    port: u16,
+}
+
+impl Builder {
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    pub fn mode(mut self, ty: Mode) -> Self {
+        self.mode = ty;
+        self
+    }
+
+    pub fn network(mut self, network: Network) -> Self {
+        self.network = network;
+        self
+    }
+
+    pub fn name(mut self, name: impl AsRef<str>) -> Self {
+        if !name.as_ref().is_empty() {
+            self.name = Some(name.as_ref().to_owned());
+        }
+        self
+    }
+
+    pub fn port(mut self, port: u16) -> Self {
+        self.port = port;
+        self
+    }
+
+    /// It supposed to open node at the supplied location
+    pub async fn build(self, directory: impl Into<Directory>) -> Result<Node, ()> {
+        let _ = directory;
+        todo!()
+    }
+}
+
+#[derive(Clone)]
+pub struct Node {
+    _ensure_cant_construct: (),
+}
+
+#[derive(Debug)]
+#[non_exhaustive]
+pub struct Info {
+    pub version: String,
+    pub network: Network,
+    pub mode: Mode,
+    pub name: Option<String>,
+    pub connected_peers: u64,
+    pub best_block: u64,
+    pub total_space_pledged: u64,
+    pub total_history_size: u64,
+    pub space_pledged: u64,
+}
+
+#[derive(Debug)]
+pub struct Block {
+    _ensure_cant_construct: (),
+}
+
+impl Node {
+    pub fn builder() -> Builder {
+        Builder::new()
+    }
+
+    pub async fn sync(&mut self) {}
+
+    // Leaves the network and gracefully shuts down
+    pub async fn close(self) {}
+
+    // Runs `.close()` and also wipes node's state
+    pub async fn wipe(self) {}
+
+    pub async fn get_info(&mut self) -> Info {
+        todo!()
+    }
+
+    pub async fn on_block<H, F>(&mut self, callback: H)
+    where
+        H: Clone + Send + Sync + 'static + FnMut(Block) -> F,
+        F: Send + 'static + std::future::Future<Output = ()>,
+    {
+        let _ = callback;
+    }
+}