func NewFBlockFromPreviousBlock(exchangeRate uint64, prev interfaces.IFBlock) interfaces.IFBlock {
if prev != nil {
newBlock := NewFBlock(exchangeRate, prev.GetDBHeight()+1)
newBlock.SetPrevKeyMR(prev.GetKeyMR().Bytes())
newBlock.SetPrevLedgerKeyMR(prev.GetLedgerKeyMR().Bytes())
return newBlock
}
return NewFBlock(exchangeRate, 0)
}
func NewFBlock(prev interfaces.IFBlock) interfaces.IFBlock {
scb := new(FBlock)
scb.BodyMR = new(primitives.Hash)
if prev != nil {
scb.PrevKeyMR = prev.GetKeyMR()
scb.PrevLedgerKeyMR = prev.GetLedgerKeyMR()
scb.ExchRate = prev.GetExchRate()
scb.DBHeight = prev.GetDBHeight() + 1
} else {
scb.PrevKeyMR = primitives.NewZeroHash()
scb.PrevLedgerKeyMR = primitives.NewZeroHash()
scb.ExchRate = 1
scb.DBHeight = 0
}
return scb
}
func CheckBlockPairIntegrity(block interfaces.IFBlock, prev interfaces.IFBlock) error {
if block == nil {
return fmt.Errorf("No block specified")
}
if prev == nil {
if block.GetPrevKeyMR().IsZero() == false {
return fmt.Errorf("Invalid PrevKeyMR")
}
if block.GetPrevLedgerKeyMR().IsZero() == false {
return fmt.Errorf("Invalid PrevLedgerKeyMR")
}
if block.GetDBHeight() != 0 {
return fmt.Errorf("Invalid DBHeight")
}
} else {
if block.GetPrevKeyMR().IsSameAs(prev.GetKeyMR()) == false {
return fmt.Errorf("Invalid PrevKeyMR")
}
if block.GetPrevLedgerKeyMR().IsSameAs(prev.GetLedgerKeyMR()) == false {
return fmt.Errorf("Invalid PrevLedgerKeyMR")
}
if block.GetDBHeight() != (prev.GetDBHeight() + 1) {
return fmt.Errorf("Invalid DBHeight")
}
}
return nil
}