[EPIC] JSON-RPC Gateway launch implementation

[franklywatson]

Master issue for tracking completion state of both the JSON-RPC endpoints and the issues we're using to track those sub-items.

API Endpoints P1 (Need for launch of development version of EVM on Flow)

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1. eth_chainId // returns the chainID
2. eth_blockNumber // returns the latest block number
3. eth_syncing // return false for now
4. eth_coinbase // return the coinbase for a block
5. eth_getUncleCountByBlockHash // return 0
6. eth_getUncleCountByBlockNumber // return 0
7. eth_getLogs
8. eth_getTransactionCount // returns the number of tx sent from an address (nonce)
9. eth_getTransactionReceipt
10. eth_getBlockByNumber
11. eth_call
12. eth_sendRawTransaction
13. eth_getTransactionByHash
14. eth_gasPrice // returns the gas price
15. eth_getBalance //returns the balance for any given block
16. eth_estimateGas // usually runs the call and checks how much gas might be used

API Endpoints P2

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1. eth_getCode // returns the code for the given address
2. eth_getTransactionByBlockNumberAndIndex
3. eth_getTransactionByBlockHashAndIndex
4. eth_getBlockByHash
5. eth_getBlockReceipts
6. eth_getBlockTransactionCountByHash
7. eth_getBlockTransactionCountByNumber
8. eth_createAccessList
9. eth_feeHistory // transaction fee history
10. eth_maxPriorityFeePerGas
11. eth_getProof // returns state proof for an account
12. eth_getStorageAt // we probably won't support this day 1
13. eth_newFilter
14. eth_uninstallFilter
15. eth_getFilterLogs
16. eth_getFilterChanges
17. eth_newBlockFilter
18. eth_newPendingTransactionFilter
19. eth_accounts
20. eth_sign
21. eth_signTransaction
22. eth_sendTransaction

Implementation issues

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1. Implement JSON-RPC scaffold and network related endpoints #1
   +0
   
2. Use Flow Emulator for local development #20
   Feature Feedback +2
   
3. Implement API functionality to support transactions #2
   +0
   
4. [EPIC] Indexer Implementation #14
   11 of 11
   Feature Feedback +2
   
5. Implement API endpoints for keeping track of account states #3
   +0
   
6. Implement API endpoints which store and index transactions plus other tx-related endpoints #4
   Improvement +1
   
7. Implement APIs to store and index blocks and provide block-related endpoints #5
   Improvement +1
   
8. Implement API to store and index logs #6
   +0
   
9. Implement unsupported API methods #8
   +0
   
10. Implement API methods which require Cadence scripts to be executed #9
    +0
    
11. Launch readiness tasks #13
    1 of 6
    Feature Improvement +2
    
12. Key rotation mechanism #76
    +0
    

[j1010001]

completed and superseded by #126