func NextECBlock(prev interfaces.IEntryCreditBlock) (interfaces.IEntryCreditBlock, error) {
e := NewECBlock()
// Handle the really unusual case of the first block.
if prev == nil {
e.GetHeader().SetPrevHeaderHash(primitives.NewHash(constants.ZERO_HASH))
e.GetHeader().SetPrevFullHash(primitives.NewHash(constants.ZERO_HASH))
e.GetHeader().SetDBHeight(0)
} else {
v, err := prev.HeaderHash()
if err != nil {
return nil, err
}
e.GetHeader().SetPrevHeaderHash(v)
v, err = prev.GetFullHash()
if err != nil {
return nil, err
}
e.GetHeader().SetPrevFullHash(v)
e.GetHeader().SetDBHeight(prev.GetHeader().GetDBHeight() + 1)
}
if err := e.(*ECBlock).BuildHeader(); err != nil {
return nil, err
}
return e, nil
}
func CheckBlockPairIntegrity(block interfaces.IEntryCreditBlock, prev interfaces.IEntryCreditBlock) error {
if block == nil {
return fmt.Errorf("No block specified")
}
if prev == nil {
if block.GetHeader().GetPrevHeaderHash().IsZero() == false {
return fmt.Errorf("Invalid PrevHeaderHash")
}
if block.GetHeader().GetPrevFullHash().IsZero() == false {
return fmt.Errorf("Invalid PrevFullHash")
}
if block.GetHeader().GetDBHeight() != 0 {
return fmt.Errorf("Invalid DBHeight")
}
} else {
h, err := prev.HeaderHash()
if err != nil {
return err
}
if block.GetHeader().GetPrevHeaderHash().IsSameAs(h) == false {
return fmt.Errorf("Invalid PrevHeaderHash")
}
h, err = prev.GetFullHash()
if err != nil {
return err
}
if block.GetHeader().GetPrevFullHash().IsSameAs(h) == false {
return fmt.Errorf("Invalid PrevFullHash")
}
if block.GetHeader().GetDBHeight() != (prev.GetHeader().GetDBHeight() + 1) {
return fmt.Errorf("Invalid DBHeight")
}
}
return nil
}