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cpacia
approved these changes
Oct 26, 2018
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This uses the addition chain from Brian Smith's website to speed up the inversion algorithm for btcec/field.go.
https://briansmith.org/ecc-inversion-addition-chains-01#secp256k1_field_inversion
Just porting from the PR found at btcsuite/btcd#1087
Thank you @bmperrea for the work. =)