Merge PR #4791: resume simulations at a given height

x/simulation/simulate.go

@@ -47,7 +47,7 @@ func SimulateFromSeed(
 	tb testing.TB, w io.Writer, app *baseapp.BaseApp,
 	appStateFn AppStateFn, seed int64,
 	ops WeightedOperations, invariants sdk.Invariants,
-	numBlocks, exportParamsHeight, blockSize int,
+	initialHeight, numBlocks, exportParamsHeight, blockSize int,
 	exportStatsPath string,
 	exportParams, commit, lean, onOperation, allInvariants bool,
 	blackListedAccs map[string]bool,
@@ -139,10 +139,12 @@ func SimulateFromSeed(
 	}
 
 	// set exported params to the initial state
-	exportedParams = params
+	if exportParams && exportParamsHeight == 0 {
+		exportedParams = params
+	}
 
 	// TODO: split up the contents of this for loop into new functions
-	for height := 1; height <= numBlocks && !stopEarly; height++ {
+	for height := initialHeight; height < numBlocks+initialHeight && !stopEarly; height++ {
 
 		// Log the header time for future lookup
 		pastTimes = append(pastTimes, header.Time)