93 lines
2.6 KiB
Go
93 lines
2.6 KiB
Go
// This is free and unencumbered software released into the public domain.
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//
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// Anyone is free to copy, modify, publish, use, compile, sell, or
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// distribute this software, either in source code form or as a compiled
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// binary, for any purpose, commercial or non-commercial, and by any
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// means.
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//
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// In jurisdictions that recognize copyright laws, the author or authors
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// of this software dedicate any and all copyright interest in the
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// software to the public domain. We make this dedication for the benefit
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// of the public at large and to the detriment of our heirs and
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// successors. We intend this dedication to be an overt act of
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// relinquishment in perpetuity of all present and future rights to this
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// software under copyright law.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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// IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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// OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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// OTHER DEALINGS IN THE SOFTWARE.
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//
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// For more information, please refer to <https://unlicense.org>
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package verkle
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import (
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"sync"
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"github.com/crate-crypto/go-ipa/ipa"
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)
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// EmptyCodeHashPoint is a cached point that is used to represent an empty code hash.
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// This value is initialized once in GetConfig().
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var (
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EmptyCodeHashPoint Point
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EmptyCodeHashFirstHalfValue Fr
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EmptyCodeHashSecondHalfValue Fr
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)
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const (
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CodeHashVectorPosition = 3 // Defined by the spec.
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EmptyCodeHashFirstHalfIdx = CodeHashVectorPosition * 2
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EmptyCodeHashSecondHalfIdx = EmptyCodeHashFirstHalfIdx + 1
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)
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var (
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FrZero Fr
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FrOne Fr
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cfg *Config
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onceCfg sync.Once
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)
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func init() {
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FrZero.SetZero()
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FrOne.SetOne()
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}
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type IPAConfig struct {
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conf *ipa.IPAConfig
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}
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type Config = IPAConfig
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func GetConfig() *Config {
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onceCfg.Do(func() {
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conf, err := ipa.NewIPASettings()
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if err != nil {
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panic(err)
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}
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cfg = &IPAConfig{conf: conf}
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// Initialize the empty code cached values.
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values := make([][]byte, NodeWidth)
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values[CodeHashVectorPosition] = EmptyCodeHash
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var c1poly [NodeWidth]Fr
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if _, err := fillSuffixTreePoly(c1poly[:], values[:NodeWidth/2]); err != nil {
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panic(err)
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}
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EmptyCodeHashPoint = *cfg.CommitToPoly(c1poly[:], 0)
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EmptyCodeHashFirstHalfValue = c1poly[EmptyCodeHashFirstHalfIdx]
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EmptyCodeHashSecondHalfValue = c1poly[EmptyCodeHashSecondHalfIdx]
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})
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return cfg
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}
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func (conf *IPAConfig) CommitToPoly(poly []Fr, _ int) *Point {
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ret := conf.conf.Commit(poly)
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return &ret
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}
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