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().SetPrevLedgerKeyMR(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.Hash()
if err != nil {
return nil, err
}
e.GetHeader().SetPrevLedgerKeyMR(v)
e.GetHeader().SetDBHeight(prev.GetHeader().GetDBHeight() + 1)
}
if err := e.(*ECBlock).BuildHeader(); err != nil {
return nil, err
}
return e, nil
}
