export const ErrorCode = { ERR_INVALID_HEADER_SIZE : 'Invalid block header size' , ERR_DUPLICATE_BLOCK : 'Block already stored' , ERR_PREVIOUS_BLOCK : 'Previous block hash not found' , ERR_LOW_DIFFICULTY : 'Insufficient difficulty' , ERR_DIFF_TARGET_HEADER : 'Incorrect difficulty target' , ERR_DIFF_PERIOD : 'Invalid difficulty period' , ERR_NOT_EXTENSION : 'Not extension of chain' , ERR_BLOCK_NOT_FOUND : 'Block not found' , ERR_CONFIRMS : 'Insufficient confirmations' , ERR_VERIFY_TX : 'Incorrect merkle proof' , ERR_INVALID_TXID : 'Invalid tx identifier' } ;