How Batch ERC-20 Transfers Save Gas Cost in EVM and HyperEVM

When you airdrop tokens to hundreds of wallets, two things matter most: gas cost and reliability. One-Click Sender is a tiny batch-transfer contract that cuts fees and guarantees an all-or-nothing result — no half-finished distributions. Below is a clean explanation of how it works, what it really saves, and how it behaves on HyperEVM.

1. Why single ERC-20 transfers are expensive

A normal transfer pays for two gas layers:

• EVM base fee: 21,000 gas just to land the tx in a block
• Token logic: ≈ 45,000 gas to update storage, emit events, run checks

Total per wallet: ≈ 66,000 gas. Do that 200 times and you burn ≈ 13.2 million gas — over a quarter of Ethereum's 30M-gas block limit.

2. What the batch-transfer contract does

function batchTransfer(
  address token,
  address[] calldata recipients,
  uint256[] calldata amounts
) external {
  require(recipients.length == amounts.length, "Length mismatch");
  for (uint256 i; i < recipients.length; ++i) {
    bool ok = IERC20(token).transferFrom(
      msg.sender,
      recipients[i],
      amounts[i]
    );
    require(ok, "transferFrom failed");
  }
}

You pay the 21,000-gas base fee once, not per recipient. The loop adds only a few hundred gas overall, and any failed transfer reverts the entire batch automatically.

3. Real-world gas savings (200 wallets)

• Regular method: ≈ 13,200,000 gas
• One batch call: ≈ 9,100,000 gas
• Saved: ≈ 4.1 million gas (≈ 31%)

The saving comes almost entirely from consolidating the 21,000-gas base fee (4.2M gas removed) with only ~0.1M gas of loop overhead added back.

At 1 Gwei gas price, this equals 0.0041 ETH (about $16.4), a 31% reduction, mainly from consolidating transaction base fees.

4. How it fits HyperEVM

HyperEVM has two lanes:

• Small blocks: 2M gas, a few-second confirmation
• Big blocks: 30M gas, ~60s confirmation

A 200-way batch (~9.1M gas) can't fit in a 2M small block. One-Click Sender therefore caps each batch at 40 addresses (≈ 1.82M gas). A 200-wallet airdrop becomes five small-block transactions that still confirm in under 30 seconds — faster than waiting a full big-block minute.

5. Five-step, five-minute workflow

1. Connect wallet.
2. Upload a CSV of recipient addresses and amounts.
3. Approve the token (one tx per token).
4. Preview the exact gas fee.
5. Sign, send, and track everything through a single explorer link.

6. Bottom line

Batch transfers compress hundreds of expensive, failure-prone calls into one atomic operation. One-Click Sender delivers ~30% gas savings on Ethereum, small-block-safe batching on HyperEVM, and a UI so simple non-developers can finish an airdrop during a coffee break. Prepare your CSV, click once, and let your next distribution run itself — cheaper, faster, and with zero partial failures.