本文在分析了基于信用透支的电子交易协议的基础上，提出了一种基于电子钱包的乐观公平交易协议。
By analysing the electronic commerce protocol based on credit, the paper proposes an optimistic fair e-commerce protocol with electronic wallets.
客户的交易只有在帐户严重透支的情况下会被停止交易，因此在该类型账户上进行交易时有比较严格的限制。
Clients' transactions will be stopped only in the circumstance of serious overdrawing of the accounts, that is to say, transactions at this type of account have strict restrictions.
客户的交易只有在帐户严重透支的情况下会被停止交易，因此在该类型账户上进行交易时有比较严格的限制。
Clients' transactions will be stopped only in the circumstance of serious overdrawing of the accounts, that is to say, transactions at this type of account have strict restrictions.
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