from bigchaindb import Bigchain import writeout b = Bigchain() # create 7 test users testuser1_priv, testuser1_pub = b.generate_keys() writeout.exportData((testuser1_priv, testuser1_pub), "user1") testuser2_priv, testuser2_pub = b.generate_keys() writeout.exportData((testuser2_priv, testuser2_pub), "user2") testuser3_priv, testuser3_pub = b.generate_keys() writeout.exportData((testuser3_priv, testuser3_pub), "user3") testuser4_priv, testuser4_pub = b.generate_keys() writeout.exportData((testuser4_priv, testuser4_pub), "user4") testuser5_priv, testuser5_pub = b.generate_keys() writeout.exportData((testuser5_priv, testuser5_pub), "user5") testuser6_priv, testuser6_pub = b.generate_keys() writeout.exportData((testuser6_priv, testuser6_pub), "user6") testuser7_priv, testuser7_pub = b.generate_keys() writeout.exportData((testuser7_priv, testuser7_pub), "govt")
# "NET PRICE": "25" ,
# "PRICE": "50" ,
# "QUANTITY": "50000" ,
# "SIDE": "S" ,
# "TYPE": "EQ"
# },
# ...]
data = []
with open('data.csv', 'r') as fid:
reader = csv.DictReader(fid)
for row in reader:
data.append(row)
# generate distinct users from the CPTY1 column and assign keys
users = []
for user_name in set([d['CPTY1'] for d in data]):
sk, vk = b.generate_keys()
user = users.append(
{
'name': user_name,
'signing_key': sk,
'verifying_key': vk
}
)
# create assets on the blockchain with the payload and assign to the user
for asset in data:
user = [u for u in users if u['name'] == asset['CPTY1']][0]
tx = b.create_transaction(b.me, user['verifying_key'], None, 'CREATE', payload=asset)
tx_signed = b.sign_transaction(tx, b.me_private)
b.write_transaction(tx_signed)
# env
#
b = Bigchain()
# lib
#
def sign_and_write(tx, private_key):
tx_signed = b.sign_transaction(tx, private_key)
b.write_transaction(tx_signed)
return tx_signed
# setup
#
pvt_key, pub_key = b.generate_keys()
pvt_key2, pub_key2 = b.generate_keys()
print("Public Key:", pub_key, "\n")
# init
#
#
# db initialization
# first transaction - asset creation - required, asset logic not used for our use-case: storing arbitrary data
print("DB init - first TX:")
asset_payload = {'msg': 'Arbitrary data asset'}
tx = b.create_transaction(b.me, pub_key, None, 'CREATE', payload=asset_payload)
tx_signed = sign_and_write(tx, b.me_private)
print("TX:", tx_signed, "\n")
