API: another round of improvements

[altergui]

today i'll be merging a PR in the backend that addresses:

• Implement TX list by block height #190
• Transactions return signer account  #222
• Remove transaction id #221
• feature: return tx subtype on tx summary vocdoni-node#1358

backend changelog:

• api: refactor full block endpoints, they now return:

  • hash
  • header (with sparse contents but struct remains untouched)
  • txCount (new field)
    removed fields:
  • evidence
  • data
  • lastCommit
    affected endpoints:
  • /chain/blocks/{height}
  • /chain/blocks/hash/{hash}

• api: remove endpoint /chain/transactions/reference/index/{index}

• api: refactor transactions endpoints:
  rename these fields:

  • transactionHash -> hash
  • blockHeight -> height
  • transactionIndex -> index
  • transactionType -> type
    add these fields:
  • subtype
  • signer

  affected endpoints:

  • /chain/blocks/{height}/transactions/page/{page}
  • /chain/transactions/page/{page}
  • /chain/transactions
  • /chain/transactions/{height}/{index}
  • /chain/transactions/reference/{hash}

• api: /chain/transactions endpoint now accepts more filter params:

  • subtype (exact match)
  • signer (exact match)

• api: new endpoint /chain/transactions/{hash}