Allow exporting subset of chain
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parent
43ceb0f5c7
commit
89c9320d80
@ -341,13 +341,25 @@ func (bc *ChainManager) ResetWithGenesisBlock(gb *types.Block) {
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// Export writes the active chain to the given writer.
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func (self *ChainManager) Export(w io.Writer) error {
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if err := self.ExportN(w, uint64(1), self.currentBlock.NumberU64()); err != nil {
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return err
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}
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return nil
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}
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// ExportN writes a subset of the active chain to the given writer.
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func (self *ChainManager) ExportN(w io.Writer, first uint64, last uint64) error {
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self.mu.RLock()
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defer self.mu.RUnlock()
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glog.V(logger.Info).Infof("exporting %v blocks...\n", self.currentBlock.Header().Number)
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last := self.currentBlock.NumberU64()
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if first > last {
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return fmt.Errorf("export failed: first (%d) is greater than last (%d)", first, last)
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}
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for nr := uint64(1); nr <= last; nr++ {
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glog.V(logger.Info).Infof("exporting %d blocks...\n", last-first)
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for nr := first; nr <= last; nr++ {
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block := self.GetBlockByNumber(nr)
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if block == nil {
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return fmt.Errorf("export failed on #%d: not found", nr)
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