From 2fefe4baa034927af0c815c9f317fefd95972298 Mon Sep 17 00:00:00 2001
From: Konrad Feldmeier <konrad@brainbot.com>
Date: Thu, 8 Jun 2017 10:38:36 +0200
Subject: [PATCH] consensus: Fix `makedag` epoch
`geth makedag <blocknumber> <path>` was creating DAGs for
`<blocknumber>/<epoch_length> + 1`, hence
it was impossible to create an epoch 0 DAG.
This fixes the calculations in `consensus/ethash/ethash.go` for
`MakeDataset` and `MakeCache`, and applies `gofmt`.
---
consensus/ethash/ethash.go | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/consensus/ethash/ethash.go b/consensus/ethash/ethash.go
index 94a9ea332..7067e8643 100644
--- a/consensus/ethash/ethash.go
+++ b/consensus/ethash/ethash.go
@@ -308,14 +308,14 @@ func (d *dataset) release() {
// MakeCache generates a new ethash cache and optionally stores it to disk.
func MakeCache(block uint64, dir string) {
- c := cache{epoch: block/epochLength + 1}
+ c := cache{epoch: block / epochLength}
c.generate(dir, math.MaxInt32, false)
c.release()
}
// MakeDataset generates a new ethash dataset and optionally stores it to disk.
func MakeDataset(block uint64, dir string) {
- d := dataset{epoch: block/epochLength + 1}
+ d := dataset{epoch: block / epochLength}
d.generate(dir, math.MaxInt32, false)
d.release()
}
--
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