diff --git a/src/block.rs b/src/block.rs
deleted file mode 100644
index e69de29..0000000
diff --git a/src/chain.rs b/src/chain.rs
index e69de29..dafa8bf 100644
--- a/src/chain.rs
+++ b/src/chain.rs
@@ -0,0 +1,73 @@
+mod block;
+
+use rand::{distributions::Alphanumeric, Rng};
+use crate::math::{sha256 as hash};
+use std::collections::HashMap;
+use std::time::{SystemTime, UNIX_EPOCH};
+use block::{BlockData as Data};
+use block::{ChainFLD as FLD};
+use block::{providerData as Provider};
+
+pub impl FLD {
+  fn new() -> Self {
+    Self { 
+      blocks: vec![],
+      provider:  Provider {
+        name: "Folody Crypto Wallet".to_owned(),
+        shortName: "FLCWL".to_owned(),
+        version: "V1.0.2RTM".to_owned(),
+        author: "Folody Crypto".to_owned(),
+        provider: "Discord".to_owned(),
+      }
+    }
+  }
+
+  fn hash2binary(hash: &[u8]) {
+
+  }
+
+  pub fn initialization(&mut self, fromAddr: String, toAddr: String) {
+    let mut block: [Any; 2] = [
+      hash(
+        rand::thread_rng()
+          .sample_iter(&Alphanumeric)
+          .take(7)
+          .map(char::from)
+          .collect()
+      )
+    ];
+    let mut blockInside = HashMap::new();
+    let blockData = Data {
+      fromAddr: fromAddr,
+      toAddr: toAddr,
+      amount: 0.0,
+      transactionMsg: "".to_owned(),
+      createdAt: SystemTime::now(),
+      verifiedBy: [],
+      providerData: self.provider
+    };
+
+    blockInside.insert(block[0].to_string().to_owned(), hash(
+      rand::thread_rng()
+        .sample_iter(&Alphanumeric)
+        .take(7)
+        .map(char::from)
+        .collect()
+    ));
+    blockInside.insert("blockData".to_owned(), blockData);
+    block[1] = blockData;
+    self.blocks.push(block);
+  }
+  
+  pub fn isValid(&self, block: &[Any; 2], previous_block: &[Any; 2]) {
+
+  }
+  pub fn tryAdd (&mut self, block: [Any; 2]) {
+    let latest = self.blocks.last().expect("there is at least one block");
+    if self.isValid(&block, latest) {
+        self.blocks.push(block);
+    } else {
+        error!("could not add block");
+    }
+  }
+}
\ No newline at end of file
diff --git a/src/chain/block.rs b/src/chain/block.rs
new file mode 100644
index 0000000..fd01661
--- /dev/null
+++ b/src/chain/block.rs
@@ -0,0 +1,23 @@
+pub struct ChainFLD {
+  pub blocks: Vec,
+pub(crate) provider: providerData,
+}
+
+pub struct providerData {
+  pub name: String,
+  pub shortName: String,
+  pub version: String,
+  pub author: String,
+  pub provider: String,
+
+}
+pub struct BlockData {
+  pub fromAddr: String,
+  pub toAddr: String,
+  pub amount: f32,
+  pub transactionMsg: String,
+  pub createdAt: i64,
+  pub verifiedBy: Vec<String>,
+  pub providerData: providerData
+
+}
diff --git a/src/main.rs b/src/main.rs
index f5880c4..b573db6 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,5 @@
 mod math;
+mod chain;
 
 use math::{sha256 as hash};