return ({ addr, pwDerivedKey, ks }) => lightwallet.signing.signTx(ks, pwDerivedKey, tx, addr);
socket.on('signedMessage',function(data){
console.log(data);
console.log(data.v);
var recoveredAddress = lightwallet.signing.recoverAddress(data.msg, data.v,data.r,data.s);
console.log(recoveredAddress.toString('hex'));
})