rpcserver: validate blindCfg.MaxNumPaths

MPins · MPins · commit 7a604c8d0090 · 2025-05-13T19:42:53.000-03:00
Assert that the blindCfg.MaxNumPaths value is non-zero.
diff --git a/rpcserver.go b/rpcserver.go
@@ -6200,6 +6200,10 @@ func (r *rpcServer) AddInvoice(ctx context.Context,
 			blindingRestrictions.NumHops = uint8(*blindCfg.NumHops)
 		}
 		if blindCfg.MaxNumPaths != nil {
+			if *blindCfg.MaxNumPaths == 0 {
+				return nil, fmt.Errorf("blinded max num " +
+					"paths cannot be 0")
+			}
 			blindingRestrictions.MaxNumPaths =
 				uint8(*blindCfg.MaxNumPaths)
 		}

Original file line number	Diff line number	Diff line change
`@@ -6200,6 +6200,10 @@ func (r *rpcServer) AddInvoice(ctx context.Context,`
`6200`	`6200`	`blindingRestrictions.NumHops = uint8(*blindCfg.NumHops)`
`6201`	`6201`	`}`
`6202`	`6202`	`if blindCfg.MaxNumPaths != nil {`
	`6203`	`+ if *blindCfg.MaxNumPaths == 0 {`
	`6204`	`+ return nil, fmt.Errorf("blinded max num " +`
	`6205`	`+ "paths cannot be 0")`
	`6206`	`+ }`
`6203`	`6207`	`blindingRestrictions.MaxNumPaths =`
`6204`	`6208`	`uint8(*blindCfg.MaxNumPaths)`
`6205`	`6209`	`}`