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The concept of decimals is purely for user-friendliness - inside the blockchain there are no decimals. That's why it's optional. If there are no decimals then you simply display what the token amount inside the contract shows - things get easier than with decimals. So it behaves like decimals was 0. This concept is rather confusing for many people. You can ...


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Do you know the MultiSender app? It allows for multiple Ether and ERC 20 token transactions to be bundled in one transaction. It's open-source on Github rstormsf/multisender in case you want to review the logic. There's also a more detailled write-up on Medium: MultiSender — Send Ether and Ethereum Tokens to Multiple Ethereum Addresses In A Single ...


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