This is a quote from the book "B-Money" by Wei Dai
...he account ofeach party by the amount of his maximum reparation and credits a specialaccount identified by a secure hash of the contract by the sum the maximumreparations. The contract becomes e
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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K_A agrees to send K_B the solution to problem P before 0:0:0 1/1/2000.K_B agrees to pay K_A 100 MU (monetary units) before 0:0:0 1/1/2000. K_Cagrees to perform arbitration in case of d...