Do I pay the Base multisender fee in ETH when I send USDC?
Yes. The Base multisender charges a Tokenry fee of 0.0001 ETH per recipient, paid in ETH on every list, USDC and USDbC included. Gas on Base is paid in ETH too. For 200 recipients, that is 0.02 ETH in Tokenry fees, plus gas. A payout that fails is skipped, and its fee comes back to you in the same transaction. A transaction that reverts pays no one and takes no Tokenry fee, but its gas is spent.
Should I send USDC or USDbC on Base?
To send USDC to many wallets on Base, pick native USDC unless your recipients asked for USDbC. USDC on Base is issued by Circle at 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 (Circle's USDC address list). USDbC, at 0xd9aAEc86B65D86f6A7B5B1b0c42FFA531710b6CA, is USDC bridged from Ethereum. The two tokens also send differently. From a regular wallet, USDC goes out after one permit signature, a signed message that costs no gas (ERC-2612). USDbC has no permit, so your wallet confirms an approval transaction first.
Which contract address should my Base approval prompt show?
Your Base approval prompt should name the multisender contract, 0xC1CEbE1dE66Efdd0b415e5fbb5462469BB1b86ba, whose source is verified on BaseScan. Reject a prompt that names another spender. The same contract runs at the same address on Ethereum, behind the Ethereum multisender, and on every other EVM chain Tokenry supports. For another chain, open the multisender for other chains. The approval covers exactly the total still to send, never an unlimited amount. The contract has no owner and no withdraw function. Each token payout goes straight from your wallet to the recipient, inside a send you sign.
Can I send from or to a Coinbase smart wallet on Base?
Yes, the Base multisender works with Coinbase smart wallets, wallets run by a smart contract, in both directions. If you send a token from a Coinbase Smart Wallet, you confirm an approval transaction first, even for USDC. On desktop without the Coinbase extension, pick the "Coinbase Wallet" row marked "Extension or Smart Wallet". As recipients, smart wallets receive ETH and tokens. A recipient that refuses a payout is skipped, and the rest still go through.
Does a buy and sell tax apply when I airdrop my Base token?
No. On a token made with the latest version of Tokenry's Base token creator, buy and sell taxes apply only to trades with the token's Uniswap v2 pools. A transfer tax, if set, applies only between ordinary wallets. The owner wallet pays no tax until ownership is transferred or renounced, and no multisender exemption is needed. A payout that would put a wallet over its max wallet limit is skipped. The owner can raise or remove the limits in the Base token manager; "Remove limits" cannot be undone. Tokens from other creators follow their own rules.
Is it cheaper to send ETH or tokens to multiple addresses on Base one by one?
In ETH, sending one by one often costs less on Base. A transfer from your own wallet has no Tokenry fee, only gas. The Base multisender saves gas on token payouts: about 30,100 gas per USDC payout to a wallet that holds no USDC yet, against about 63,000 gas for a direct transfer. On Base, that saving is small next to the 0.0001 ETH Tokenry fee per recipient. What the Base multisender saves is wallet confirmations: one per transaction instead of one per recipient. You also get a review of the list before you sign.
Base ERC-20
