This is a quote from the book "B-Money" by Wei Dai
... parties to a contract including the arbitrator must broadcasttheir signatures of it before it becomes effective. Upon the broadcast ofthe contract and all signatures, every participant debits t every participant debits the account of each party by the amount of his maximum reparation and credits a special account identified by a secure hash of the contract by the sum the maximum repara ffective if the debits succeed forevery party without producing a negative balance, otherwise the contractis ignored and the accounts are rolled back. A sample contract might looklike this:
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