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Bitcoin / Development & Technical Discussion / Re: simbit - p2p network simulator
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on: May 13, 2014, 06:22:56 PM
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It's not too hard to collect stale block/share rates and propagation time of messages, I'll build that into the inventory system soon. Right now the MinCen simulation isn't a good model of mincen yet for the following reasons: - No MTUs
- No merkle blocks
Nodes don't adjust peering relationships based on which nodes have best connectivity to miners- Nodes don't enforce transaction verification before relaying shares
- Transactions aren't being created
When those things are added I can get all of the stats you were simulating before. Supporting DECOR/GHOST is also on my todo list.
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6
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Bitcoin / Development & Technical Discussion / Re: simbit - p2p network simulator
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on: May 10, 2014, 10:54:58 AM
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MinCen SimulationDemo: http://ebfull.github.io/Code: https://github.com/ebfull/simbit/blob/master/sim.jsSergio's MinCen is an interesting incentive structure for aggregating mining and discouraging forks in the chain, which comes in handy when block intervals are decreased below network propagation rates. It is a quasi-decentralized system in which miners voluntarily delegate to a master (or manager) party whose primary purpose is to select the winning branch and prevent a wasteful race. In theory, if the master attempts to abuse their position, it is in complete view of the network and the master will be abandoned. Some malicious actions can be prevented with fraud proofs. I've created a bare-bones simulation of this protocol with 1 minute block times, with M=16 share slots. This is just a demonstration; a thorough analysis of MinCen would require much more to be implemented.
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7
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Bitcoin / Development & Technical Discussion / simbit - p2p network simulator
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on: May 10, 2014, 10:54:47 AM
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simbit is a javascript p2p network simulator which focuses on consensus networks like Bitcoin. It can be executed with Node (in clustered simulations) or in the web browser with visualization. It is a general framework for simulating any number of latency-sensitive networks, strategies and protocols. Project page: http://github.com/ebfull/simbitThe standard bitcoin simulation includes a working blockchain (with difficulty adjustment, reorgs), maporphans, mempool, UTXO, orphan transactions, inventory system, peer manager and mining simulator. This is still in alpha. In fact the TCP-like network interface for nodes does not yet account for the size of messages between nodes, and nodes do not yet (but can) simulate computational delay. Also, the network topography is really arbitrary and probably does not represent the real bitcoin network. It also does not come close to perfectly representing the reference client. I would love feedback, and if you have anything you'd like added or simulated using this framework feel free to bring it up to me. The goal of this framework isn't exactly to be the most efficient possible, but fun and easy to develop with.
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8
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Economy / Securities / Re: ASICMINER: Entering the Future of ASIC Mining by Inventing It
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on: April 16, 2014, 06:15:27 AM
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friedcat finally handled a lot of shareholder transfers the last couple days, so I'm expecting a dividend finally today.
Good luck with that, the last dividend payouts were 20140330 20140320 20140312 20140305 See the pattern? We've had months with no dividends before, with no communication. They're busy and they keep their heads low. I have less reason than ever to be concerned about no dividends.
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13
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Economy / Auctions / Re: ASICMINER Shares: 500 for sale
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on: March 25, 2014, 07:31:09 PM
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I would just add that I purchased a from eb3full without escrow. He simply created a contract and emailed it to friedcat with a deadline for payment to be sent to a certain address.
Went very smoothly and showed the power of Public-Private key encryption.
+1 Never understood why escrow is ever needed for Asicminer transfers. Did friedcat confirm the contract to you before payment? friedcat can confirm ownership of the shares, it just takes a bit longer to get a reply from him like that.
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20
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Economy / Securities / Re: ASICMINER: Entering the Future of ASIC Mining by Inventing It
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on: March 04, 2014, 10:55:27 AM
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Conceptually I like option 3 but without regulation what protection is there in anything regarding BTC other than the currency itself? I'm sure FC is a stand up guy but what mechanism or condition is in place for investors to have any assurance they will see benefits from their investment should things really move in a positive manner?
Things moved in a very positive manner last year (20% network hashrate) and friedcat dished out enormous dividends.
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