From 571be97d227148241a801c39f2be9c11db7c8001 Mon Sep 17 00:00:00 2001
From: Kieran Prasch <kieranprasch@gmail.com>
Date: Thu, 1 Mar 2018 19:26:41 -0800
Subject: [PATCH] [KMS-ETH]- Revert ursula flow to depiction.

---
 scripts/ursula_flow.py | 93 ++++++++++++++++++++++++++++++++----------
 1 file changed, 72 insertions(+), 21 deletions(-)

diff --git a/scripts/ursula_flow.py b/scripts/ursula_flow.py
index dcde166ae..7885210ca 100755
--- a/scripts/ursula_flow.py
+++ b/scripts/ursula_flow.py
@@ -1,33 +1,84 @@
-from nkms_eth.blockchain import TesterBlockchain
-from nkms_eth.escrow import Escrow
-from nkms_eth.token import NuCypherKMSToken
-from nkms_eth.miner import Miner
+#!/usr/bin/env python3
+
+"""Deploy contracts in tester.
+
+A simple Python script to deploy contracts and then estimate gas for different methods.
+"""
+import random
+from nkms_eth.blockchain import project
+
+TIMEOUT = 10
+MINING_COEFF = [10 ** 5, 10 ** 7]
+M = int(1e6)
+NULL_ADDR = '0x' + '0' * 40
 
 
 def main():
-    testerchain = TesterBlockchain()
+    proj = project()
 
-    print("Web3 providers -> ", testerchain.chain.web3.providers)
-    creator, *addresses = testerchain.chain.web3.eth.accounts
-    # ursula, alice, *everyone_else = addresses
+    chain_name = "tester"
+    print("Make sure {} chain is running, you can connect to it, or you'll get timeout".format(chain_name))
 
-    # Create NC ERC20 token
-    token = NuCypherKMSToken(blockchain=testerchain)
+    with proj.get_chain(chain_name) as chain:
+        web3 = chain.web3
+        print("Web3 providers are", web3.providers)
+        creator = web3.eth.accounts[0]
+        # ursula = web3.eth.accounts[1]
+        # alice = web3.eth.accounts[2]
 
-    # Prepare escrow and miner
-    escrow = Escrow(blockchain=testerchain, token=token)
-    miner = Miner(blockchain=testerchain, token=token, escrow=escrow)
+        # Create an ERC20 token
+        token, tx = chain.provider.get_or_deploy_contract(
+            'HumanStandardToken', deploy_args=[
+                int(1e9) * M, int(1e10) * M, 'NuCypher KMS', 6, 'KMS'],
+            deploy_transaction={
+                'from': creator})
+        chain.wait.for_receipt(tx, timeout=TIMEOUT)
+        print("Deployed HumanStandardToken, tx hash is", tx)
 
-    # Airdropping
-    token._airdrop()
+        escrow, tx = chain.provider.get_or_deploy_contract(
+            'Escrow', deploy_args=[token.address] + MINING_COEFF,
+            deploy_transaction={'from': creator})
+        chain.wait.for_receipt(tx, timeout=TIMEOUT)
+        print("Deployed escrow, tx hash is", tx)
 
-    # Locking
-    for address in addresses:
-        miner.lock(address=address, amount=1000*NuCypherKMSToken.M, locktime=100)
+        # debug airdrop
+        txs = [
+                token.transact({'from': creator}).transfer(account, 10000 * M)
+                for account in web3.eth.accounts[1:]]
+        for tx in txs:
+            chain.wait.for_receipt(tx, timeout=TIMEOUT)
+        print('Airdrop done')
 
-    # Select random miners
-    miners = escrow.sample()
-    print(miners)
+        # Test locking
+        for addr in web3.eth.accounts[1:]:
+            tx = token.transact({'from': addr}).approve(
+                    escrow.address, 1000 * M)
+            chain.wait.for_receipt(tx, timeout=TIMEOUT)
+            tx = escrow.transact({'from': addr}).deposit(1000 * M, 100)
+            chain.wait.for_receipt(tx, timeout=TIMEOUT)
+
+        n_tokens = escrow.call().getAllLockedTokens()
+        print('Locked', n_tokens)
+
+        print(web3.eth.accounts[1])
+        print(web3.eth.accounts[-1])
+        address_stop, shift = escrow.call().findCumSum(NULL_ADDR, n_tokens // 3)
+        print(address_stop, shift)
+
+        # Experimenting with distributions of random points
+        n_ursulas = 5
+        n_select = int(n_ursulas * 1.7)  # Select more ursulas
+        points = [0] + sorted(random.randrange(n_tokens) for _ in
+                              range(n_select))
+        deltas = [i - j for i, j in zip(points[1:], points[:-1])]
+        addrs = set()
+        addr = NULL_ADDR
+        shift = 0
+        for delta in deltas:
+            addr, shift = escrow.call().findCumSum(addr, delta + shift)
+            addrs.add(addr)
+        addrs = random.sample(addrs, n_ursulas)
+        print(addrs)
 
 
 if __name__ == "__main__":