Re: [Bitcoin-development] BIP32 Index Randomisation

2015-03-13 Thread Matias Alejo Garcia
Could you describe what exactly BWS does? Sure. BWS tasks are: * Coordinate Transaction proposals in multisignature wallets: provide an 'always connected' node to distribute pending transaction proposals and receive the signatures from peers. * Coordinate and store BIP32 derivation indexes.

Re: [Bitcoin-development] BIP32 Index Randomisation

2015-03-13 Thread Mike Hearn
It sounds like the main issue is this is a web wallet server of some kind. If the clients were SPV then they'd be checking their own balances and downloading their own tx history, which would mean the coordination tasks could be done by storing encrypted blobs on the server rather than the server

Re: [Bitcoin-development] BIP32 Index Randomisation

2015-03-13 Thread Mike Hearn
You are killing us Mike! :) We really don't like to think that BWS is a webwallet. Note that private keys are not stored (not even encrypted) at the server. Sure, sorry, by web wallet I meant a blockchain.info/CoPay type setup where the client has the private keys and signs txns, but

Re: [Bitcoin-development] BIP32 Index Randomisation

2015-03-13 Thread Matias Alejo Garcia
It sounds like the main issue is this is a web wallet server of some kind. If the clients were SPV then they'd be checking their own balances and downloading their own tx history, which would mean the coordination tasks could be done by storing encrypted blobs on the server rather than the

Re: [Bitcoin-development] BIP32 Index Randomisation

2015-03-12 Thread Gregory Maxwell
This seems overly complicated to me, unless I'm missing something. Instead, I think you should just give the server the master pubkey P only without the chaincode. Then when you transact you generate the address in whatever manner you like and tell the server the scalar value iL which the user

[Bitcoin-development] BIP32 Index Randomisation

2015-03-12 Thread Matias Alejo Garcia
Hello everyone, We are working on bitcore-wallet-server (BWS), a HD multisig wallet 'facilitator'. We have a couple of questions regarding BIP32 path usage, and we would love to have feedback from you before moving forward. Currently the BWS instances hold the set of extended public keys of the