web3.providers-http: ETH2 Style JSON RPC Schema support

[spacesailor24]

ETH2 Style JSON RPC Schema

• GET requests with URL parameters

  `http://127.0.0.1/eth/v1/beacon/states/${state_id}/validators/${validator_id}`

• POST requests with URL parameters and request body
  • Publishing a signed block
  • Submit attestation
  • Submit attester slashing

[philknows]

Outstanding issue to be discussed later. Need to further investigate provider architecture.

[github-actions]

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