api: fetch blocks and transactions from indexer rather than app BlockStore

these endpoints now fetch blocks from indexer, return just `header` and include `txCount`
 * /chain/blocks
 * /chain/blocks/{height}
 * /chain/blocks/hash/{hash}

this new endpoint fetches the full tx from indexer, and includes `subtype` and `signer` fields
 * /chain/transactions/{hash}

this legacy endpoint is now marked as deprecated
 * /chain/transactions/{height}/{index}

this endpoint now accepts more filter params (subtype, signer)
 * /chain/transactions

refactor:
* api: rename chainBlockHandler -> chainBlockByHeightHandler

Author: altergui

api/api.go

@@ -77,6 +77,8 @@ const (
 	ParamHeight          = "height"
 	ParamReference       = "reference"
 	ParamType            = "type"
+	ParamSubtype         = "subtype"
+	ParamSigner          = "signer"
 	ParamAccountIdFrom   = "accountIdFrom"
 	ParamAccountIdTo     = "accountIdTo"
 	ParamStartDateAfter  = "startDateAfter"

api/api_types.go

@@ -50,8 +50,11 @@ type AccountParams struct {
 // TransactionParams allows the client to filter transactions
 type TransactionParams struct {
 	PaginationParams
-	Height uint64 `json:"height,omitempty"`
-	Type   string `json:"type,omitempty"`
+	Hash    string `json:"hash,omitempty"`
+	Height  uint64 `json:"height,omitempty"`
+	Type    string `json:"type,omitempty"`
+	Subtype string `json:"subtype,omitempty"`
+	Signer  string `json:"signer,omitempty"`
 }
 
 // BlockParams allows the client to filter blocks
@@ -292,9 +295,9 @@ type TransfersList struct {
 }
 
 type GenericTransactionWithInfo struct {
-	TxContent json.RawMessage          `json:"tx"`
-	TxInfo    indexertypes.Transaction `json:"txInfo"`
-	Signature types.HexBytes           `json:"signature"`
+	TxContent json.RawMessage           `json:"tx"`
+	TxInfo    *indexertypes.Transaction `json:"txInfo"`
+	Signature types.HexBytes            `json:"signature"`
 }
 
 type ChainInfo struct {
@@ -444,8 +447,9 @@ func CensusTypeToOrigin(ctype CensusTypeDescription) (models.CensusOrigin, []byt
 }
 
 type Block struct {
-	comettypes.Block `json:",inline"`
-	Hash             types.HexBytes `json:"hash" `
+	comettypes.Header `json:"header"`
+	Hash              types.HexBytes `json:"hash" `
+	TxCount           int64          `json:"txCount"`
 }
 
 // BlockList is used to return a paginated list to the client