06f78e0083
- Adds interfaces for developers to build handlers that update data in response to log events - Resolves #29
69 lines
1.8 KiB
Go
69 lines
1.8 KiB
Go
package history
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import (
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"io"
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"text/template"
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"github.com/vulcanize/vulcanizedb/pkg/core"
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"github.com/vulcanize/vulcanizedb/pkg/datastore"
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)
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const WindowTemplate = `Validating Blocks
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|{{.LowerBound}}|-- Validation Window --|{{.UpperBound}}| ({{.UpperBound}}:HEAD)
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`
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var ParsedWindowTemplate = *template.Must(template.New("window").Parse(WindowTemplate))
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type BlockValidator struct {
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blockchain core.Blockchain
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blockRepository datastore.BlockRepository
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windowSize int
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parsedLoggingTemplate template.Template
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}
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func NewBlockValidator(blockchain core.Blockchain, blockRepository datastore.BlockRepository, windowSize int) *BlockValidator {
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return &BlockValidator{
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blockchain,
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blockRepository,
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windowSize,
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ParsedWindowTemplate,
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}
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}
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func (bv BlockValidator) ValidateBlocks() ValidationWindow {
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window := MakeValidationWindow(bv.blockchain, bv.windowSize)
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blockNumbers := MakeRange(window.LowerBound, window.UpperBound)
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RetrieveAndUpdateBlocks(bv.blockchain, bv.blockRepository, blockNumbers)
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lastBlock := bv.blockchain.LastBlock().Int64()
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bv.blockRepository.SetBlocksStatus(lastBlock)
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return window
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}
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func (bv BlockValidator) Log(out io.Writer, window ValidationWindow) {
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bv.parsedLoggingTemplate.Execute(out, window)
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}
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type ValidationWindow struct {
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LowerBound int64
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UpperBound int64
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}
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func (window ValidationWindow) Size() int {
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return int(window.UpperBound - window.LowerBound)
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}
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func MakeValidationWindow(blockchain core.Blockchain, windowSize int) ValidationWindow {
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upperBound := blockchain.LastBlock().Int64()
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lowerBound := upperBound - int64(windowSize)
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return ValidationWindow{lowerBound, upperBound}
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}
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func MakeRange(min, max int64) []int64 {
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a := make([]int64, max-min)
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for i := range a {
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a[i] = min + int64(i)
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}
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return a
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}
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