mirror of
https://github.com/kremalicious/metamask-extension.git
synced 2024-11-22 18:00:18 +01:00
38 lines
1.3 KiB
Diff
38 lines
1.3 KiB
Diff
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lazy precompute for faster module initialization
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diff --git a/node_modules/secp256k1/lib/js/ecpointg.js b/node_modules/secp256k1/lib/js/ecpointg.js
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index 0144364..09a87c5 100644
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--- a/node_modules/secp256k1/lib/js/ecpointg.js
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+++ b/node_modules/secp256k1/lib/js/ecpointg.js
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@@ -8,11 +8,12 @@ function ECPointG () {
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this.x = BN.fromBuffer(Buffer.from('79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798', 'hex'))
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this.y = BN.fromBuffer(Buffer.from('483ADA7726A3C4655DA4FBFC0E1108A8FD17B448A68554199C47D08FFB10D4B8', 'hex'))
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this.inf = false
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-
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- this._precompute()
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+ this.precomputed = undefined
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}
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ECPointG.prototype._precompute = function () {
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+ if (this.precomputed !== undefined) return
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+
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var ecpoint = new ECPoint(this.x, this.y)
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var dstep = 4
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@@ -34,6 +35,7 @@ ECPointG.prototype._precompute = function () {
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}
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ECPointG.prototype.mul = function (num) {
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+ this._precompute()
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// Algorithm 3.42 Fixed-base NAF windowing method for point multiplication
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var step = this.precomputed.doubles.step
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var points = this.precomputed.doubles.points
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@@ -68,6 +70,7 @@ ECPointG.prototype.mul = function (num) {
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}
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ECPointG.prototype.mulAdd = function (k1, p2, k2) {
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+ this._precompute()
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var nafPointsP1 = this.precomputed.naf
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var nafPointsP2 = p2._getNAFPoints1()
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var wnd = [nafPointsP1.points, nafPointsP2.points]
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