public static SearchResult <Block> SearchForBlock(this IBlockFinder blockFinder, BlockParameter blockParameter, bool allowNulls = false)
{
Block block;
if (blockParameter.RequireCanonical)
{
block = blockFinder.FindBlock(blockParameter.BlockHash, BlockTreeLookupOptions.RequireCanonical);
if (block == null && !allowNulls)
{
BlockHeader?header = blockFinder.FindHeader(blockParameter.BlockHash);
if (header != null)
{
return(new SearchResult <Block>($"{blockParameter.BlockHash} block is not canonical", ErrorCodes.InvalidInput));
}
}
}
else
{
block = blockFinder.FindBlock(blockParameter);
}
if (block == null)
{
if (blockParameter.Equals(BlockParameter.Finalized) || blockParameter.Equals(BlockParameter.Safe))
{
return(new SearchResult <Block>("Unknown block error", ErrorCodes.UnknownBlockError));
}
if (!allowNulls)
{
return(new SearchResult <Block>(
$"Block {blockParameter.BlockHash?.ToString() ?? blockParameter.BlockNumber?.ToString() ?? blockParameter.Type.ToString()} could not be found",
ErrorCodes.ResourceNotFound));
}
}
return(new SearchResult <Block>(block));
}