points analysis: Etherfi

[wakamex]

• [x] make our calculations match to the last wei
  • needed according to their instructions
  • "Step 3: If we add all the effective_balances from for each user from the endpoint, it must equal the sum of WEETH (or EETH ) of the provided contracts from step 2 (weethContract.balanceOf(address)). If at any point this invariant is not true, we will stop issuing points to your users"
• [x] create endpoint
• [x] fill out form: https://docs.google.com/forms/d/1UzzdQ6y7_LVFBig28FdVE99kp4WURr7P4yluiUl70Bs/edit?pli=1
• [x] speed up get_logs from 17s to 0.1s
• [x] speed up total query from 7s to 4s using s3 caching
• [x] implement custom DecimalEncoder to pass their verification without losing precision
• [ ] make blockNumber do something
• [ ] ensure no possible double counting with withdrawal shares