How can I write a script to move ETH from many wallets associated with a mnemonic to a single wallet?

Question

Would be grateful to be pointed to any resources that would allow me to do this. Thanks!

Answer 1

You need to first parse all the accounts in your HD wallet.

For example, if you have a Ledger Nano, there is a script here.

Or you can just generate addresses from a predefined mnemonic with ethereumjs-wallet as described here.

Finally, once you have the Nth address generated by the HD wallet you can just use:

web3.eth.sendTransaction ( { from: nthaddress, to: singleaddress, value: web3.eth.getBalanceOf( nthaddress ) - fee } )

to do the transaction

where nthaddress is the deriveAccount with the path m/xx'/yy'/0'/.. ( e.g.: "m/44'/60'/0'/0/0" )