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I know that any kind of operation over a token is possible so long as you implement the smart contract that achieves what you desire. For example, a function multisend can be developed that allows sending to many destinations in one transaction.

But is there any ERC spec out there that defines the opposite? That is, sending a token from many addresses (if you own the private key of all of them, of course), each address containing some amount of that token, to one destination?

Thanks

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The ERC20 standard is sufficient to do what you want. Users will have to approve your smart contract to move their tokens, and you can define a receiveMultiple function in your contract that loops through a parameter that is an array of addresses and amounts to take from them

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  • mmm, but the approve operation goes into one transaction itself, so this wouldn't allow saving fees which is the ultimate reason I wanted to do everything in one transaction
    – knocte
    Dec 13, 2018 at 2:56
  • alternatively the token can have a signedTransfer that takes a signed message to transfer as authorization, but that wouldn't be work for contract that holds the tokens
    – natewelch_
    Dec 13, 2018 at 2:58
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Maybe your meaning is multi-signature.if so, there is a contract you can have a look.https://etherscan.io/address/0x851b7f3ab81bd8df354f0d7640efcd7288553419#code

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    of course I don't mean multisig
    – knocte
    Dec 12, 2018 at 10:33
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    I said many addresses, not many private keys (each address containing some token balance)
    – knocte
    Dec 12, 2018 at 10:34
  • oh, I think many addresses send some token will generate many transactions, so these need many signature, I think it can not be completed by a contract. If you get what you want at last, you can tell me.
    – skyge
    Dec 12, 2018 at 11:18

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