分布式撮合引擎

bitsquare

Main characteristics

● P2P infrastructure without servers: No single point of failure and no privacy breach due transaction monitoring possible.

● National (or alternative crypto) currency are transferred directly from one user’s payment account to the others payment account without any intermediate party.

● Support for alternative crypto currencies to be exchanged with Bitcoin.

● No registration or identification process

● Decentralized arbitrator system as primary protection mechanism

● Security deposit as additional incentive for following the trade protocol

● A atomic deposit transaction locks up both traders funds to a 2 of 3 multisig address

● Trading fees as protection against spam and market manipulation

● A limit on the trade amount (1 BTC) to reduce the overall risk exposure

● Open source license (AGPL)

● Contract holds all trade details and is signed by both traders, it will be used as evidence in case of a dispute

● Fraud reports as protection against bank charge backs and crime (stolen payment account)

Deposit transaction

Upon taking an offer, a deposit transaction is created using a 2­of­3 multi­signature pay­to­script­hash (P2SH) output script to fund the escrow address. The deposit transaction is passed for completion and signing between the traders over the messaging channel. Finally it is published to the Bitcoin blockchain by the offerer.

The deposit transaction to the escrow address contains:

● Input from Alice: Security deposit + mining fee

● Input from Bob: Security deposit + mining fee + trade amount

● Output to escrow address: 2*Security deposit + mining fee + trade amount

● Output to record contract hash: OP_RETURN + hash of contract (20 bytes).