NET_ID=42
RPC_URL=https://kovan.infura.io/v3/a3f4d001c1fc4a359ea70dd27fd9cb51
PRIVATE_KEY=
MIXER_ADDRESS=0x30AF2e92263C5387A8A689322BbfE60b6B0855C4
# in wei
DESIRED_FEE=10000000000000000