Add toolchain for testing eth-relay

[clearloop]

Steps

• [x] development mode script
• [x] mock contract from /src/etheream
• [x] sending loop for strking eth blocks(canonical hash)
• [x] test relay header without ui
  • [x] genesis header
  • [x] relay header
  • [x] eth backing
• [x] fix tests
• [x] transfer error (at least 100,000,000,000)
• [x] display error msg
• [x] test guide
• [x] add all tests together.

[clearloop]

Status

The current process in this test script are:

• Transfer to the darwinia redeem contract's holder account
• Reset genesis header
• Relay header (only can do once)
• Redeem RING

Question

Do we still need all these processes dynamic?

1. keep relaying headers to darwinia
2. transfer to darwinia smart contract in ropsten
3. check receipt
4. redeem

These might hard to test due to network delay always happens.

Edited

I'll make all scripts including the UI be dynamic because the static solution can only run once for a new first-test node.

• only can relay a header for once
• only can redeem a receipt for once

[hackfisher]

Do we still need all these processes dynamic?

keep relaying headers to darwinia transfer to darwinia smart contract in ropsten check receipt redeem

Yes, separate efforts moved to #12 and #13