From 1f654213b6922ab9797f21d907efacb54e960e15 Mon Sep 17 00:00:00 2001
From: kbizikav <132550763+kbizikav@users.noreply.github.com>
Date: Mon, 8 Dec 2025 18:03:40 +0700
Subject: [PATCH 1/3] feat: estimate gas & add buffer for transfer

---
 src/services/balance_transfer.rs | 20 ++++++++++++++------
 1 file changed, 14 insertions(+), 6 deletions(-)

diff --git a/src/services/balance_transfer.rs b/src/services/balance_transfer.rs
index bf70044..9e4ff04 100644
--- a/src/services/balance_transfer.rs
+++ b/src/services/balance_transfer.rs
@@ -21,18 +21,26 @@ pub async fn balance_transfer(
     let signer = get_provider_with_signer(provider, deposit_private_key);
     let deposit_address = get_address_from_private_key(deposit_private_key);
     let balance = provider.get_balance(deposit_address).await?;
-    // todo: use estimate gas
-    let gas_limit = U256::from(10000);
-    let gas_price = U256::from(provider.get_gas_price().await?);
 
-    if balance < gas_price * gas_limit {
+    // Estimate gas and fees to avoid under-budgeting and leave room for gas bumps.
+    let estimate_request = TransactionRequest::default().to(to_address);
+    let estimated_gas = provider.estimate_gas(estimate_request).await?;
+    let fee_estimation = signer.estimate_eip1559_fees().await?;
+    let gas_limit = U256::from(estimated_gas);
+    let max_fee_per_gas = U256::from(fee_estimation.max_fee_per_gas);
+    let gas_budget = gas_limit * max_fee_per_gas * U256::from(125u64) / U256::from(100u64);
+
+    if balance <= gas_budget {
         print_warning("Insufficient balance to transfer");
         return Ok(());
     }
-    let transfer_amount = balance - gas_price * gas_limit;
+    let transfer_amount = balance - gas_budget;
     let tx_request = TransactionRequest::default()
         .to(to_address)
-        .value(transfer_amount);
+        .value(transfer_amount)
+        .gas_limit(estimated_gas)
+        .max_fee_per_gas(fee_estimation.max_fee_per_gas)
+        .max_priority_fee_per_gas(fee_estimation.max_priority_fee_per_gas);
     send_transaction_with_gas_bump(
         provider,
         signer,

From e278524f69255d110bd1eeb47a3e3aeffd2dd4cb Mon Sep 17 00:00:00 2001
From: kbizikav <132550763+kbizikav@users.noreply.github.com>
Date: Mon, 8 Dec 2025 18:10:01 +0700
Subject: [PATCH 2/3] feat: add double buffer

---
 src/services/balance_transfer.rs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/services/balance_transfer.rs b/src/services/balance_transfer.rs
index 9e4ff04..7cc98b0 100644
--- a/src/services/balance_transfer.rs
+++ b/src/services/balance_transfer.rs
@@ -28,7 +28,7 @@ pub async fn balance_transfer(
     let fee_estimation = signer.estimate_eip1559_fees().await?;
     let gas_limit = U256::from(estimated_gas);
     let max_fee_per_gas = U256::from(fee_estimation.max_fee_per_gas);
-    let gas_budget = gas_limit * max_fee_per_gas * U256::from(125u64) / U256::from(100u64);
+    let gas_budget = gas_limit * max_fee_per_gas * U256::from(2u64);
 
     if balance <= gas_budget {
         print_warning("Insufficient balance to transfer");

From d6a7d32d373ba6cb00b8888fa10989efe7f53355 Mon Sep 17 00:00:00 2001
From: kbizikav <132550763+kbizikav@users.noreply.github.com>
Date: Mon, 8 Dec 2025 18:21:59 +0700
Subject: [PATCH 3/3] chore: update version

---
 Cargo.lock | 2 +-
 Cargo.toml | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/Cargo.lock b/Cargo.lock
index f39cd1f..e787dc0 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2716,7 +2716,7 @@ checksum = "68354c5c6bd36d73ff3feceb05efa59b6acb7626617f4962be322a825e61f79a"
 
 [[package]]
 name = "mining-cli"
-version = "1.3.4"
+version = "1.3.5"
 dependencies = [
  "aes-gcm",
  "alloy",
diff --git a/Cargo.toml b/Cargo.toml
index 86dd040..5fd8b94 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -1,6 +1,6 @@
 [package]
 name = "mining-cli"
-version = "1.3.4"
+version = "1.3.5"
 edition = "2021"
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html