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core: allow modifying test-chain block times

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This commit is contained in:
Péter Szilágyi 2015-09-17 13:32:00 +03:00
parent 58fbcaa750
commit 6f3cb12924
1 changed files with 11 additions and 0 deletions
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11
core/chain_makers.go
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@ -131,6 +131,17 @@ func (b *BlockGen) PrevBlock(index int) *types.Block {
return b.chain[index] return b.chain[index]
} }
// OffsetTime modifies the time instance of a block, implicitly changing its
// associated difficulty. It's useful to test scenarios where forking is not
// tied to chain length directly.
func (b *BlockGen) OffsetTime(seconds int64) {
b.header.Time.Add(b.header.Time, new(big.Int).SetInt64(seconds))
if b.header.Time.Cmp(b.parent.Header().Time) <= 0 {
panic("block time out of range")
}
b.header.Difficulty = CalcDifficulty(b.header.Time.Uint64(), b.parent.Time().Uint64(), b.parent.Number(), b.parent.Difficulty())
}
// GenerateChain creates a chain of n blocks. The first block's // GenerateChain creates a chain of n blocks. The first block's
// parent will be the provided parent. db is used to store // parent will be the provided parent. db is used to store
// intermediate states and should contain the parent's state trie. // intermediate states and should contain the parent's state trie.