Add min-height and max-height filters to TxSearch

CHANGELOG.md

@@ -100,6 +100,9 @@ for JSON encoding.
 * (types) [\#5585](https://github.com/cosmos/cosmos-sdk/pull/5585) IBC additions:
   * `Coin` denomination max lenght has been increased to 32.
   * Added `CapabilityKey` alias for `StoreKey` to match IBC spec.
+* (rest) [\#5648](https://github.com/cosmos/cosmos-sdk/pull/5648) Enhance /txs usability:
+  * Add `tx.minheight` key to filter transaction with an inclusive minimum block height
+  * Add `tx.maxheight` key to filter transaction with an inclusive maximum block height
 
 ## [v0.38.1] - 2020-02-11
 

client/lcd/swagger-ui/swagger.yaml

@@ -268,6 +268,16 @@ paths:
           description: Maximum number of items per page
           type: integer
           x-example: 1
+        - in: query
+          name: tx.minheight
+          type: integer
+          description: "transactions on blocks with height greater or equal this value"
+          x-example: 25
+        - in: query
+          name: tx.maxheight
+          type: integer
+          description: "transactions on blocks with height less than or equal this value"
+          x-example: 800000
       responses:
         200:
           description: All txs matching the provided events

types/rest/rest.go

@@ -22,6 +22,8 @@ import (
 const (
 	DefaultPage  = 1
 	DefaultLimit = 30 // should be consistent with tendermint/tendermint/rpc/core/pipe.go:19
+	TxMinHeightKey = "tx.minheight" // Inclusive minimum height filter
+	TxMaxHeightKey = "tx.maxheight" // Inclusive maximum height filter
 )
 
 // ResponseWithHeight defines a response object type that wraps an original
@@ -337,6 +339,10 @@ func ParseHTTPArgsWithLimit(r *http.Request, defaultLimit int) (tags []string, p
 		var tag string
 		if key == types.TxHeightKey {
 			tag = fmt.Sprintf("%s=%s", key, value)
+		} else if key == TxMinHeightKey {
+			tag = fmt.Sprintf("%s>=%s", types.TxHeightKey, value)
+		} else if key == TxMaxHeightKey {
+			tag = fmt.Sprintf("%s<=%s", types.TxHeightKey, value)
 		} else {
 			tag = fmt.Sprintf("%s='%s'", key, value)
 		}

types/rest/rest_test.go

@@ -71,6 +71,8 @@ func TestParseHTTPArgs(t *testing.T) {
 	reqE2 := mustNewRequest(t, "", "/?limit=-1", nil)
 	req4 := mustNewRequest(t, "", "/?foo=faa", nil)
 
+	reqTxH := mustNewRequest(t, "", "/?tx.minheight=12&tx.maxheight=14", nil)
+
 	tests := []struct {
 		name  string
 		req   *http.Request
@@ -89,6 +91,7 @@ func TestParseHTTPArgs(t *testing.T) {
 		{"error limit 0", reqE2, httptest.NewRecorder(), []string{}, DefaultPage, DefaultLimit, true},
 
 		{"tags", req4, httptest.NewRecorder(), []string{"foo='faa'"}, DefaultPage, DefaultLimit, false},
+		{"tags", reqTxH, httptest.NewRecorder(), []string{"tx.height>=12", "tx.height<=14"}, DefaultPage, DefaultLimit, false},
 	}
 	for _, tt := range tests {
 		tt := tt