def bob_to_charlie(test_grpc_endpoint, mixer_instance, mk_root, mk_path1,
input_note1, input_address1, bob_eth_address, keystore,
mk_tree_depth, zksnark):
print("=== Bob transfers 1ETH to Charlie from his funds on the mixer ===")
charlie_apk = keystore["Charlie"]["AddrPk"][
"aPK"] # We generate a coin for Charlie (recipient1)
bob_apk = keystore["Bob"]["AddrPk"][
"aPK"] # We generate a coin for Bob: the change (recipient2)
bob_ask = keystore["Bob"]["AddrSk"]["aSK"] # Bob is the sender
# Create the an additional dummy input for the JoinSplit
(input_note2, input_nullifier2,
input_address2) = zethMock.getDummyInput(bob_apk, bob_ask)
dummy_mk_path = zethMock.getDummyMerklePath(mk_tree_depth)
(output_note1, output_note2,
proof_json) = zethGRPC.get_proof_joinsplit_2by2(
test_grpc_endpoint,
mk_root,
input_note1,
input_address1,
mk_path1,
input_note2,
input_address2,
dummy_mk_path,
bob_ask, # sender
bob_apk, # recipient1 (change)
charlie_apk, # recipient2 (transfer)
zethGRPC.int64ToHexadecimal(Web3.toWei(
'1', 'ether')), # value output note 1
zethGRPC.int64ToHexadecimal(Web3.toWei(
'1', 'ether')), # value output note 2
zero_wei_hex, # v_in
zero_wei_hex, # v_out
zksnark)
output_note1_str = json.dumps(zethGRPC.parseZethNote(output_note1))
output_note2_str = json.dumps(zethGRPC.parseZethNote(output_note2))
ciphertext1 = zethUtils.encrypt(
output_note1_str,
keystore["Bob"]["AddrPk"]["ek"]) # Bob is the recipient
ciphertext2 = zethUtils.encrypt(
output_note2_str,
keystore["Charlie"]["AddrPk"]["ek"]) # Charlie is the recipient
return zethContracts.mix(
mixer_instance,
ciphertext1,
ciphertext2,
proof_json,
bob_eth_address,
w3.toWei(
1, 'wei'
), # Pay an arbitrary amount (1 wei here) that will be refunded since the `mix` function is payable
4000000,
zksnark)
def charlie_withdraw(test_grpc_endpoint, mixer_instance, mk_root, mk_path1,
input_note1, input_address1, charlie_eth_address,
keystore, mk_tree_depth, zksnark):
print(" === Charlie withdraws 0.9 from his funds on the Mixer ===")
charlie_apk = keystore["Charlie"]["AddrPk"]["aPK"]
charlie_ask = keystore["Charlie"]["AddrSk"]["aSK"]
# Create the an additional dummy input for the JoinSplit
(input_note2, input_nullifier2,
input_address2) = zethMock.getDummyInput(charlie_apk, charlie_ask)
dummy_mk_path = zethMock.getDummyMerklePath(mk_tree_depth)
(output_note1, output_note2,
proof_json) = zethGRPC.get_proof_joinsplit_2by2(
test_grpc_endpoint,
mk_root,
input_note1,
input_address1,
mk_path1,
input_note2,
input_address2,
dummy_mk_path,
charlie_ask, # sender
charlie_apk, # recipient1
charlie_apk, # recipient2
zethGRPC.int64ToHexadecimal(Web3.toWei(
'0.1', 'ether')), # value output note 1
zero_wei_hex, # value output note 2
zero_wei_hex, # v_in
zethGRPC.int64ToHexadecimal(Web3.toWei('0.9', 'ether')), # v_out
zksnark)
output_note1_str = json.dumps(zethGRPC.parseZethNote(output_note1))
output_note2_str = json.dumps(zethGRPC.parseZethNote(output_note2))
ciphertext1 = zethUtils.encrypt(
output_note1_str,
keystore["Charlie"]["AddrPk"]["ek"]) # Charlie is the recipient
ciphertext2 = zethUtils.encrypt(
output_note2_str,
keystore["Charlie"]["AddrPk"]["ek"]) # Charlie is the recipient
return zethContracts.mix(
mixer_instance,
ciphertext1,
ciphertext2,
proof_json,
charlie_eth_address,
w3.toWei(
1, 'wei'
), # Pay an arbitrary amount (1 wei here) that will be refunded since the `mix` function is payable
4000000,
zksnark)
def bob_deposit(test_grpc_endpoint, mixer_instance, mk_root, bob_eth_address,
keystore, mk_tree_depth):
print(
"=== Bob deposits 4 ETH for himself and splits his deposited funds into note1: 2ETH, note2: 2ETH ==="
)
bob_apk = keystore["Bob"]["AddrPk"]["aPK"]
bob_ask = keystore["Bob"]["AddrSk"]["aSK"]
# Create the JoinSplit dummy inputs for the deposit
(input_note1, input_nullifier1,
input_address1) = zethMock.getDummyInput(bob_apk, bob_ask)
(input_note2, input_nullifier2,
input_address2) = zethMock.getDummyInput(bob_apk, bob_ask)
dummy_mk_path = zethMock.getDummyMerklePath(mk_tree_depth)
(output_note1, output_note2,
proof_json) = zethGRPC.get_proof_joinsplit_2by2(
test_grpc_endpoint,
mk_root,
input_note1,
input_address1,
dummy_mk_path,
input_note2,
input_address2,
dummy_mk_path,
bob_ask, # sender
bob_apk, # recipient1
bob_apk, # recipient2
zethGRPC.int64ToHexadecimal(Web3.toWei(
'2', 'ether')), # value output note 1
zethGRPC.int64ToHexadecimal(Web3.toWei(
'2', 'ether')), # value output note 2
zethGRPC.int64ToHexadecimal(Web3.toWei('4', 'ether')), # v_in
zero_wei_hex # v_out
)
output_note1_str = json.dumps(zethGRPC.parseZethNote(output_note1))
output_note2_str = json.dumps(zethGRPC.parseZethNote(output_note2))
ciphertext1 = zethUtils.encrypt(output_note1_str,
keystore["Bob"]["AddrPk"]["ek"])
ciphertext2 = zethUtils.encrypt(output_note2_str,
keystore["Bob"]["AddrPk"]["ek"])
return zethContracts.mix(mixer_instance, ciphertext1,
ciphertext2, proof_json, bob_eth_address,
w3.toWei(4, 'ether'), 4000000)