Method, device and system for preventing repudiation based on block chain

The invention relates to the technical field of block chains, in particular to a method, a device and a system for preventing repudiation based on a block chain. Through the Buyer, the seller or any two of the three parties of the e-commerce platform can solve the transfer or refund of the money in the electronic transaction, The invention avoids the denial of the transaction participants and causes that the money cannot reach the corresponding transaction participants, among which, the e-commerce platform cannot obtain the operation money at will, thus ensuring the digital capital safety of the transaction participants. 本发明涉及区块链技术领域，尤其涉及种基于区块链的防止抵赖的交易方法、装置及系统。其中通过买方、卖方或者电商平台3方中任意两方就可以解决电子交易中款项的转账或者退还，避免了交易参与方出现抵赖的情况，而造成款项不能到达相应的交易参与方，其中，电商平台也不能够随意的获得操作款项，保证了交易参与方的数字资金安全。