[how you guys choose what unspent outputs to use]

Imagine I have 20 different unspent outputs, ranging in value from 0.0001 BTC - 1.0 BTC.

Now, supposing I need to create and send 0.01 BTC in a raw transaction. I'm wondering how you guys choose what unspent outputs to use.

Obviously any unspent output >= 0.01 can be used, but is there a preferred way of doing this?

listunspent -> pick an unspent output that has the most confirmations and is >= 0.01.
listunspent -> pick any unspent output as long as it's >=0.01.
etc.

[settxfee]

I've got a fully functioning web service working with my bitcoin daemon, which I'm pretty happy with. When a withdrawal is requested, I'm doing the following -

settxfee =  16 satoshis / per byte (this seems pretty safe, however I may switch to using 'estimatefee 6')
sendtoaddress (I'm terrified about attempting rawtransactions)

I'm now thinking how to best handle fees so that they won't eat in to any potential profits. Sending to many isn't an option at this point. Withdrawals will come from warm storage.

• Would it make more sense to utilize sendFrom, and then specify a minimum confirmation of ~6? I believe this should reduce fees.
• Is there anything I can do with my warm storage funds, in terms of organising unspent outputs, that will help increase their priority etc and therefore reduce fees?
• In the client it's possible to deduct the transaction fee from the sending amount, is this possible through the daemon?
• Are there any other practices or recommendations I'm missing?

I'm still thinking how to best handle things. Should I eat the tx fees or pass them on. Should I deduct a static fee from all withdrawals or a tiny percentage.

Standard enough situation, I'm using -walletnotify to call gettransaction, in order to monitor incoming payments.

My plan is to iterate through all outputs and

• only check outputs that have 'category = receive'
• only check outputs that include an address I have presented to a user I.e. stored in my database

Does this sound ok to implement or am I missing something?

I am setting up a Bitcoin shop and I have a couple of questions as follows -

• When using the bitcoind daemon, if I modify/delete the bitcoin.conf file, are there are repercussions doing this?
• More specifically, if I use 'keypool=1000', and then in a few months time decide I need a larger number of addresses, can I simply change this to 100000 and restart the daemon? Will the previous wallets/addresses be removed?

Thanks

Curious to see what these S3 0.5 Silvers are going for.

I bought it a couple of years back. It's currently ungraded, but I have a good inkling it will be in the region of MS68-70 as it looks perfect to me. (Stored in a capsule, never removed)

What is the going rate for these at the moment? Ballpark would suffice. Can upload some photo's later to get a more accurate idea.

[10-12 mBtc/day]

I've been running my S5 for about 6 months now, pointing it at Antpool the entire time.

Before the crazy Hash Rate increase, I was probably averaging 10-12 mBtc/day, which has roughly halved now.

However, the 24Hr earnings stat on the main Dashboard, recently shows anywhere from 15-20 mBtc, which is obviously incorrect, given my daily payout.

This has been going on like this for a couple of weeks now.

Anyone else experience this?

[This is a genuine sale. Open to reasonable offers.]

I have recently received a S7 coupon from Bitmain, having purchased an S5 back in June/July.

I am not purchasing a S7 miner anytime soon, so I'm willing to sell this to anyone.

This is a genuine sale. Open to reasonable offers.

As for the 'new' account, my main account on here is 'BitmainBuyer' which I've recently forgot the password of (no email registered).

If there's a way to prove validity of this coupon, I'm open to suggestions.