HELP ME WITH BCH IN A MULTISIGN ADDRESS

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Hy to everyone, Just some days ago I send for error some BCH to my BTC Wallet. I use ELECTRUM. I realized after that I made a mistake with the address and I tried to recover, I import my private key in the electrum cash wallet but nothing, I tried also to import the seed nothing again. I check and I realized also that my private key not correspond to my address. My address start with the number 3 and I discovered that is a multi-sign address. I don't understand how I am using a multisig address when I didn't choose that, but anyway my problem persist and someone could help to find a way to have back my BCH? How can I export the correct key of my address I don't know what I can try anymore.

Luca Fusari

Posted 2017-12-14T15:06:10.687

Reputation: 1

Question was closed 2017-12-18T16:38:24.003

Answers

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Addresses starting with "3" do not always correspond to a multisig address. Such addresses are called P2SH (Pay-to-Script-Hash) addresses. In order to get your bitcoins back from such addresses you need to know the script corresponding to the address and provide the right arguments. In most cases this is indeed a MultiSig address. But with electrum it is more likely that this is a P2SH-P2WPKH (Segwit) address, if you used a BIP39 mnemonic seed and the Derivation Path m/49'/0'/0' . In that case you only need your public key hash to claim your BCHs back. If i understand correctly you only need to provide

0x160014<20-byte-public-key-hash>

as script signature in your transaction to fullfill the requirements in a non segwit environment.

Stefan Mayer

Posted 2017-12-14T15:06:10.687

Reputation: 1

OK. So I should write what you suggest where?In Electrum or Electrum cash?and there is some procedure that I can follow? I am not still confident in this new technology. And if is a Multisig address? – Luca Fusari – 2017-12-15T05:17:01.493

This does not work with Electrum and Electrum Cash you need to manually create such a raw transaction. You can use all tools that can be used to create such a raw transaction in bitcoin, because you do not need to hash and sign the transaction. Such tools are for example libbitcoin-explorer or you could create one with a library such as bitcoinjs-lib. If it is a multisig address you need to figure out the public keys and the configuration of the multisig address.

– Stefan Mayer – 2017-12-15T10:09:40.553

thank you for the explanation, there are some manuals to make a raw transaction? and sorry if I ask you but this address has 3 different public address but when I imported the private key show me a different address... could you explain me why? – Luca Fusari – 2017-12-17T06:18:16.503

If this is a multisig address, you need to use bitcoin cash tools as this requires hashing and signing. This can also be done in electron cash. You just need to create a multi sig wallet in electron cash and add all cosigner private keys. You can just look at the electrum documentation. You then have to figure out the configuration. For this you can just create a 1-3, 2-3 and 3-3 multi sig address and check if there is any balance.

– Stefan Mayer – 2017-12-17T13:53:21.803

Asked: 2017-12-14T15:06:10.687

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Active: 2017-12-14T16:52:25.500