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deps - patch secp256k1 for fast module init via lazy loading (#14677)

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kumavis 2022-05-11 13:21:23 -10:00 committed by GitHub
parent 6c757ab5e0
commit 02d374fde0
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1 changed files with 37 additions and 0 deletions
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patches/secp256k1+3.8.0.patch Normal file
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@ -0,0 +1,37 @@
lazy precompute for faster module initialization
diff --git a/node_modules/secp256k1/lib/js/ecpointg.js b/node_modules/secp256k1/lib/js/ecpointg.js
index 0144364..09a87c5 100644
--- a/node_modules/secp256k1/lib/js/ecpointg.js
+++ b/node_modules/secp256k1/lib/js/ecpointg.js
@@ -8,11 +8,12 @@ function ECPointG () {
this.x = BN.fromBuffer(Buffer.from('79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798', 'hex'))
this.y = BN.fromBuffer(Buffer.from('483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8', 'hex'))
this.inf = false
-
- this._precompute()
+ this.precomputed = undefined
}
ECPointG.prototype._precompute = function () {
+ if (this.precomputed !== undefined) return
+
var ecpoint = new ECPoint(this.x, this.y)
var dstep = 4
@@ -34,6 +35,7 @@ ECPointG.prototype._precompute = function () {
}
ECPointG.prototype.mul = function (num) {
+ this._precompute()
// Algorithm 3.42 Fixed-base NAF windowing method for point multiplication
var step = this.precomputed.doubles.step
var points = this.precomputed.doubles.points
@@ -68,6 +70,7 @@ ECPointG.prototype.mul = function (num) {
}
ECPointG.prototype.mulAdd = function (k1, p2, k2) {
+ this._precompute()
var nafPointsP1 = this.precomputed.naf
var nafPointsP2 = p2._getNAFPoints1()
var wnd = [nafPointsP1.points, nafPointsP2.points]