In [5]:
import zlmdb
import cfxdb
db = zlmdb.Database('../xbrdb-transactions', maxsize=2**30, readonly=True)
xbr = cfxdb.xbr.Schema.attach(db)
with db.begin() as txn:
cnt = xbr.offers.count(txn)
print('{} data encryption key offers so far so far'.format(cnt))
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