diff --git a/Cargo.lock b/Cargo.lock
index e9bfead..f48eefa 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1609,6 +1609,7 @@ dependencies = [
  "serde",
  "ssz-rs",
  "tokio",
+ "toml",
 ]
 
 [[package]]
diff --git a/Cargo.toml b/Cargo.toml
index d108745..0b6469b 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,3 +18,4 @@ jsonrpsee = { version = "0.15.1", features = ["full"] }
 revm = "1.9.0"
 bytes = "1.2.1"
 futures = "0.3.23"
+toml = "0.5.9"
diff --git a/configs/goerli.toml b/configs/goerli.toml
new file mode 100644
index 0000000..ae7d8f9
--- /dev/null
+++ b/configs/goerli.toml
@@ -0,0 +1,20 @@
+[general]
+chain_id = 5
+genesis_root = "0x043db0d9a83813551ee2f33450d23797757d430911a9320530ad8a0eabc43efb"
+checkpoint = "0x172128eadf1da46467f4d6a822206698e2d3f957af117dd650954780d680dc99"
+consensus_rpc = "http://testing.prater.beacon-api.nimbus.team"
+execution_rpc = "https://eth-goerli.g.alchemy.com:443/v2/o_8Qa9kgwDPf9G8sroyQ-uQtyhyWa3ao"
+
+[forks]
+
+[forks.genesis]
+epoch = 0
+fork_version = "0x00001020"
+
+[forks.altair]
+epoch = 36660
+fork_version = "0x01001020"
+
+[forks.bellatrix]
+epoch = 112260
+fork_version = "0x02001020"
diff --git a/src/client/client.rs b/src/client/client.rs
index 4af29c5..4befbaa 100644
--- a/src/client/client.rs
+++ b/src/client/client.rs
@@ -1,6 +1,9 @@
+use std::sync::Arc;
+
 use ethers::prelude::{Address, U256};
 use eyre::Result;
 
+use crate::common::config::Config;
 use crate::consensus::types::Header;
 use crate::consensus::ConsensusClient;
 use crate::execution::evm::Evm;
@@ -9,20 +12,23 @@ use crate::execution::ExecutionClient;
 pub struct Client {
     consensus: ConsensusClient,
     execution: ExecutionClient,
+    config: Arc<Config>,
 }
 
 impl Client {
-    pub async fn new(
-        consensus_rpc: &str,
-        execution_rpc: &str,
-        checkpoint_hash: &str,
-    ) -> Result<Self> {
-        let consensus = ConsensusClient::new(consensus_rpc, checkpoint_hash).await?;
+    pub async fn new(config: Arc<Config>) -> Result<Self> {
+        let consensus_rpc = &config.general.consensus_rpc;
+        let checkpoint_hash = &config.general.checkpoint;
+        let execution_rpc = &config.general.execution_rpc;
+
+        let consensus =
+            ConsensusClient::new(consensus_rpc, checkpoint_hash, config.clone()).await?;
         let execution = ExecutionClient::new(execution_rpc);
 
         Ok(Client {
             consensus,
             execution,
+            config,
         })
     }
 
@@ -66,6 +72,10 @@ impl Client {
         }
     }
 
+    pub fn chain_id(&self) -> u64 {
+        self.config.general.chain_id
+    }
+
     pub fn get_header(&self) -> &Header {
         self.consensus.get_head()
     }
diff --git a/src/client/rpc.rs b/src/client/rpc.rs
index b1eda92..c2058ed 100644
--- a/src/client/rpc.rs
+++ b/src/client/rpc.rs
@@ -1,7 +1,10 @@
-use ethers::{abi::AbiEncode, types::{Address, U256}};
+use ethers::{
+    abi::AbiEncode,
+    types::{Address, U256},
+};
 use eyre::Result;
-use std::{fmt::Display, net::SocketAddr, str::FromStr, sync::Arc};
 use serde::{Deserialize, Serialize};
+use std::{fmt::Display, net::SocketAddr, str::FromStr, sync::Arc};
 
 use jsonrpsee::{
     core::{async_trait, Error},
@@ -9,7 +12,7 @@ use jsonrpsee::{
     proc_macros::rpc,
 };
 
-use crate::common::utils::hex_str_to_bytes;
+use crate::common::utils::{hex_str_to_bytes, u64_to_hex_string};
 
 use super::Client;
 
@@ -46,6 +49,8 @@ trait EthRpc {
     async fn get_code(&self, address: &str, block: &str) -> Result<String, Error>;
     #[method(name = "call")]
     async fn call(&self, opts: CallOpts, block: &str) -> Result<String, Error>;
+    #[method(name = "chainId")]
+    fn chain_id(&self) -> Result<String, Error>;
 }
 
 struct RpcInner {
@@ -95,14 +100,22 @@ impl EthRpcServer for RpcInner {
             "latest" => {
                 let to = convert_err(Address::from_str(&opts.to))?;
                 let data = convert_err(hex_str_to_bytes(&opts.data.unwrap_or("0x".to_string())))?;
-                let value = convert_err(U256::from_str_radix(&opts.value.unwrap_or("0x0".to_string()), 16))?;
+                let value = convert_err(U256::from_str_radix(
+                    &opts.value.unwrap_or("0x0".to_string()),
+                    16,
+                ))?;
 
                 let res = convert_err(self.client.call(&to, &data, value).await)?;
                 Ok(hex::encode(res))
-            },
+            }
             _ => Err(Error::Custom("Invalid Block Number".to_string())),
         }
     }
+
+    fn chain_id(&self) -> Result<String, Error> {
+        let id = self.client.chain_id();
+        Ok(u64_to_hex_string(id))
+    }
 }
 
 async fn start(rpc: RpcInner) -> Result<(HttpServerHandle, SocketAddr)> {
diff --git a/src/common/config.rs b/src/common/config.rs
new file mode 100644
index 0000000..66f4e80
--- /dev/null
+++ b/src/common/config.rs
@@ -0,0 +1,64 @@
+use std::{fs, path::Path};
+
+use eyre::Result;
+use serde::Deserialize;
+
+use super::utils::hex_str_to_bytes;
+
+#[derive(Deserialize, Debug)]
+pub struct Config {
+    pub general: General,
+    pub forks: Forks,
+}
+
+#[derive(Deserialize, Debug)]
+pub struct General {
+    pub chain_id: u64,
+    #[serde(deserialize_with = "bytes_deserialize")]
+    pub genesis_root: Vec<u8>,
+    #[serde(deserialize_with = "bytes_deserialize")]
+    pub checkpoint: Vec<u8>,
+    pub consensus_rpc: String,
+    pub execution_rpc: String,
+}
+
+#[derive(Deserialize, Debug)]
+pub struct Forks {
+    pub genesis: Fork,
+    pub altair: Fork,
+    pub bellatrix: Fork,
+}
+
+#[derive(Deserialize, Debug)]
+pub struct Fork {
+    pub epoch: u64,
+    #[serde(deserialize_with = "bytes_deserialize")]
+    pub fork_version: Vec<u8>,
+}
+
+impl Config {
+    pub fn from_file(path: &Path) -> Result<Self> {
+        let contents = fs::read_to_string(path)?;
+        Ok(toml::from_str(&contents)?)
+    }
+
+    pub fn fork_version(&self, slot: u64) -> Vec<u8> {
+        let epoch = slot / 32;
+
+        if epoch >= self.forks.bellatrix.epoch {
+            self.forks.bellatrix.fork_version.clone()
+        } else if epoch >= self.forks.altair.epoch {
+            self.forks.altair.fork_version.clone()
+        } else {
+            self.forks.genesis.fork_version.clone()
+        }
+    }
+}
+
+fn bytes_deserialize<'de, D>(deserializer: D) -> Result<Vec<u8>, D::Error>
+where
+    D: serde::Deserializer<'de>,
+{
+    let bytes: String = serde::Deserialize::deserialize(deserializer)?;
+    Ok(hex_str_to_bytes(&bytes).unwrap())
+}
diff --git a/src/common/mod.rs b/src/common/mod.rs
index b5614dd..472f7fc 100644
--- a/src/common/mod.rs
+++ b/src/common/mod.rs
@@ -1 +1,2 @@
+pub mod config;
 pub mod utils;
diff --git a/src/consensus/consensus.rs b/src/consensus/consensus.rs
index 3466bc5..abbefff 100644
--- a/src/consensus/consensus.rs
+++ b/src/consensus/consensus.rs
@@ -1,3 +1,5 @@
+use std::sync::Arc;
+
 use blst::min_pk::{PublicKey, Signature};
 use blst::BLST_ERROR;
 use eyre::Result;
@@ -5,11 +7,13 @@ use ssz_rs::prelude::*;
 
 use super::rpc::Rpc;
 use super::types::*;
+use crate::common::config::Config;
 use crate::common::utils::*;
 
 pub struct ConsensusClient {
     rpc: Rpc,
     store: Store,
+    config: Arc<Config>,
 }
 
 #[derive(Debug)]
@@ -20,7 +24,11 @@ struct Store {
 }
 
 impl ConsensusClient {
-    pub async fn new(nimbus_rpc: &str, checkpoint_block_root: &str) -> Result<ConsensusClient> {
+    pub async fn new(
+        nimbus_rpc: &str,
+        checkpoint_block_root: &Vec<u8>,
+        config: Arc<Config>,
+    ) -> Result<ConsensusClient> {
         let rpc = Rpc::new(nimbus_rpc);
 
         let mut bootstrap = rpc.get_bootstrap(checkpoint_block_root).await?;
@@ -32,7 +40,8 @@ impl ConsensusClient {
         );
 
         let header_hash = bootstrap.header.hash_tree_root()?;
-        let header_valid = header_hash.to_string() == checkpoint_block_root.to_string();
+        let header_valid =
+            header_hash.to_string() == format!("0x{}", hex::encode(checkpoint_block_root));
 
         if !(header_valid && committee_valid) {
             return Err(eyre::eyre!("Invalid Bootstrap"));
@@ -44,7 +53,7 @@ impl ConsensusClient {
             next_sync_committee: None,
         };
 
-        Ok(ConsensusClient { rpc, store })
+        Ok(ConsensusClient { rpc, store, config })
     }
 
     pub async fn get_execution_payload(&self) -> Result<ExecutionPayload> {
@@ -147,7 +156,7 @@ impl ConsensusClient {
         }
 
         let header_root = bytes_to_bytes32(update.attested_header.hash_tree_root()?.as_bytes());
-        let signing_root = compute_committee_sign_root(header_root)?;
+        let signing_root = self.compute_committee_sign_root(header_root, update.signature_slot)?;
         let sig = &update.sync_aggregate.sync_committee_signature;
         let is_valid_sig = is_aggregate_valid(sig, signing_root.as_bytes(), &pks);
 
@@ -174,6 +183,21 @@ impl ConsensusClient {
                 Some(update.next_sync_committee.as_ref().unwrap().clone());
         }
     }
+
+    fn compute_committee_sign_root(&self, header: Bytes32, slot: u64) -> Result<Node> {
+        let genesis_root = self
+            .config
+            .general
+            .genesis_root
+            .to_vec()
+            .try_into()
+            .unwrap();
+
+        let domain_type = &hex::decode("07000000")?[..];
+        let fork_version = Vector::from_iter(self.config.fork_version(slot));
+        let domain = compute_domain(domain_type, fork_version, genesis_root)?;
+        compute_signing_root(header, domain)
+    }
 }
 
 fn get_participating_keys(
@@ -300,18 +324,6 @@ fn branch_to_nodes(branch: Vec<Bytes32>) -> Result<Vec<Node>> {
         .collect::<Result<Vec<Node>>>()
 }
 
-fn compute_committee_sign_root(header: Bytes32) -> Result<Node> {
-    let genesis_root =
-        hex::decode("043db0d9a83813551ee2f33450d23797757d430911a9320530ad8a0eabc43efb")?
-            .to_vec()
-            .try_into()
-            .unwrap();
-    let domain_type = &hex::decode("07000000")?[..];
-    let fork_version = Vector::from_iter(hex::decode("02001020").unwrap());
-    let domain = compute_domain(domain_type, fork_version, genesis_root)?;
-    compute_signing_root(header, domain)
-}
-
 #[derive(SimpleSerialize, Default, Debug)]
 struct SigningData {
     object_root: Bytes32,
diff --git a/src/consensus/rpc.rs b/src/consensus/rpc.rs
index 10d5625..f1f16a3 100644
--- a/src/consensus/rpc.rs
+++ b/src/consensus/rpc.rs
@@ -13,10 +13,11 @@ impl Rpc {
         }
     }
 
-    pub async fn get_bootstrap(&self, block_root: &str) -> Result<Bootstrap> {
+    pub async fn get_bootstrap(&self, block_root: &Vec<u8>) -> Result<Bootstrap> {
+        let root_hex = hex::encode(block_root);
         let req = format!(
-            "{}/eth/v0/beacon/light_client/bootstrap/{}",
-            self.rpc, block_root
+            "{}/eth/v0/beacon/light_client/bootstrap/0x{}",
+            self.rpc, root_hex
         );
         let res = reqwest::get(req).await?.json::<BootstrapResponse>().await?;
         Ok(res.data.v)
diff --git a/src/execution/evm.rs b/src/execution/evm.rs
index e5e7acb..0d26f80 100644
--- a/src/execution/evm.rs
+++ b/src/execution/evm.rs
@@ -74,7 +74,6 @@ impl ProofDB {
 
 impl Database for ProofDB {
     fn basic(&mut self, address: H160) -> AccountInfo {
-
         if is_precompile(&address) {
             return AccountInfo::default();
         }
@@ -112,7 +111,6 @@ impl Database for ProofDB {
     }
 
     fn storage(&mut self, address: H160, slot: U256) -> U256 {
-
         let execution = self.execution.clone();
         let addr = address.clone();
         let slots = [slot];
diff --git a/src/execution/execution.rs b/src/execution/execution.rs
index 7209c2b..06a3992 100644
--- a/src/execution/execution.rs
+++ b/src/execution/execution.rs
@@ -30,7 +30,7 @@ impl ExecutionClient {
         payload: &ExecutionPayload,
     ) -> Result<Account> {
         let slots = slots.unwrap_or(&[]);
-        
+
         let proof = self
             .rpc
             .get_proof(&address, slots, payload.block_number)
diff --git a/src/execution/proof.rs b/src/execution/proof.rs
index f38df2f..05a1738 100644
--- a/src/execution/proof.rs
+++ b/src/execution/proof.rs
@@ -7,7 +7,6 @@ pub fn verify_proof(proof: &Vec<Vec<u8>>, root: &Vec<u8>, path: &Vec<u8>, value:
     let mut expected_hash = root.clone();
     let mut path_offset = 0;
 
-
     for (i, node) in proof.iter().enumerate() {
         if expected_hash != keccak256(node).to_vec() {
             return false;
@@ -22,10 +21,11 @@ pub fn verify_proof(proof: &Vec<Vec<u8>>, root: &Vec<u8>, path: &Vec<u8>, value:
             path_offset += 1;
         } else if node_list.len() == 2 {
             if i == proof.len() - 1 {
-
                 // exclusion proof
-                if &node_list[0][skip_length(&node_list[0])..] != &path[path_offset..] && value[0] == 0x80 {
-                    return true
+                if &node_list[0][skip_length(&node_list[0])..] != &path[path_offset..]
+                    && value[0] == 0x80
+                {
+                    return true;
                 }
 
                 // inclusion proof
diff --git a/src/main.rs b/src/main.rs
index 6b98b28..3d05147 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,9 +1,10 @@
-use std::{sync::Arc, time::Duration};
+use std::{path::Path, sync::Arc, time::Duration};
 
 use eyre::Result;
+use tokio::time::sleep;
 
 use client::{rpc::Rpc, Client};
-use tokio::time::sleep;
+use common::config::Config;
 
 pub mod client;
 pub mod common;
@@ -12,11 +13,9 @@ pub mod execution;
 
 #[tokio::main]
 async fn main() -> Result<()> {
-    let consensus_rpc = "http://testing.prater.beacon-api.nimbus.team";
-    let execution_rpc = "https://eth-goerli.g.alchemy.com:443/v2/o_8Qa9kgwDPf9G8sroyQ-uQtyhyWa3ao";
-    let checkpoint = "0x172128eadf1da46467f4d6a822206698e2d3f957af117dd650954780d680dc99";
+    let config = Config::from_file(Path::new("./configs/goerli.toml"))?;
 
-    let mut client = Client::new(consensus_rpc, execution_rpc, checkpoint).await?;
+    let mut client = Client::new(Arc::new(config)).await?;
     client.sync().await?;
 
     let mut rpc = Rpc::new(Arc::new(client));