This is a quote from the book "B-Money" by Wei Dai
...roadcast of the solution to thatproblem everyone credits the broadcaster's account by 3 units.
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2. The transfer of money. If Alice (owner of pseudonym K_A) wishes totransfer X u
wishes to transfer X units of money to Bob (owner of pseudonym K_B), she broadcasts the message "I give X units of money to K_B" signed by K_A. Upon the broadcast of this message, ever
X units andcredits K_B's account by X units, unless this would create a negativebalance in K_A's account in which case the message is ignored.
3. The effecting of contract...