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Currently OP MOD is considered nonstandard in the Bitcoin protocol, but we can for example combine OP SHA1 and OP GREATERTHAN to gain a similar effect.
https://www.cs.technion.ac.il/~idddo/cointossBitcoin.pdf
How can we combine OP_SHA1 and OP_GREATERTHAN to calculate modulus? Or in other words, how can we do the following things using bitcoin scripting:
Calculate
amodbwith countercStart with counter 0, keep adding 1 and stop if OP_GREATERTHAN for
bandcreturns zero.Write counter increments
atimes in clockwise order and modulus is last number.Example: 8 mod 4 will result in 1 2 3 0 1 2 3 0 which is zero.
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