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block_range.go
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block_range.go
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package l1_parallel_sync
import (
"errors"
"fmt"
)
const (
latestBlockNumber uint64 = ^uint64(0)
invalidBlockNumber uint64 = uint64(0)
)
var (
errBlockRangeInvalidIsNil = errors.New("block Range Invalid: block range is nil")
errBlockRangeInvalidIsZero = errors.New("block Range Invalid: Invalid: from or to are 0")
errBlockRangeInvalidIsWrong = errors.New("block Range Invalid: fromBlock is greater than toBlock")
)
type blockRange struct {
fromBlock uint64
toBlock uint64
}
func blockNumberToString(b uint64) string {
if b == latestBlockNumber {
return "latest"
}
if b == invalidBlockNumber {
return "invalid"
}
return fmt.Sprintf("%d", b)
}
func (b *blockRange) String() string {
return fmt.Sprintf("[%s, %s]", blockNumberToString(b.fromBlock), blockNumberToString(b.toBlock))
}
func (b *blockRange) len() uint64 {
if b.toBlock == latestBlockNumber || b.fromBlock == latestBlockNumber {
return 0
}
return b.toBlock - b.fromBlock + 1
}
func (b *blockRange) isValid() error {
if b == nil {
return errBlockRangeInvalidIsNil
}
if b.fromBlock == invalidBlockNumber || b.toBlock == invalidBlockNumber {
return errBlockRangeInvalidIsZero
}
if b.fromBlock > b.toBlock {
return errBlockRangeInvalidIsWrong
}
return nil
}
func (b *blockRange) overlaps(br blockRange) bool {
return b.fromBlock <= br.toBlock && br.fromBlock <= b.toBlock
}