diff --git a/src/cc/musig.cpp b/src/cc/musig.cpp
index 1a664f4b4..17c4d1368 100755
--- a/src/cc/musig.cpp
+++ b/src/cc/musig.cpp
@@ -13,6 +13,52 @@
  *                                                                            *
  ******************************************************************************/
 
+/* first make a combined pk:
+./c cclib combine 18 \"[%2202aff51dad774a1c612dc82e63f85f07b992b665836b0f0efbcb26ee679f4f4848%22,%22039433dc3749aece1bd568f374a45da3b0bc6856990d7da3cd175399577940a775%22]\"
+{
+    "pkhash": "5be117f3c5ce87e7dc6882c24b8231e0652ee82054bf7b9f94aef1f45e055cba",
+    "combined_pk": "032ddac56613cd0667b589bd7f32b665e2d2ce0247e337a5a0bca6c72e3d9d057b",
+    "result": "success"
+}
+*/
+
+/* second, send 0.777 coins to the combined_pk
+ ./c cclib send 18 \"[%22032ddac56613cd0667b589bd7f32b665e2d2ce0247e337a5a0bca6c72e3d9d057b%22,0.777]\"
+ {
+ "hex": "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",
+ "txid": "cb5309ed249da95e2b5696eb763a8736e2fff1d14922ada737b931494ca3d2be",
+ "result": "success"
+ }
+ 
+ {
+ "value": 0.77710000,
+ "valueZat": 77710000,
+ "n": 0,
+ "scriptPubKey": {
+ "asm": "a22c8020c71ddb3aac7f9b9e4bdacf032aaa8b8e4433c4ff9f8a43cebb9c1f5da96928a48103120c008203000401 OP_CHECKCRYPTOCONDITION",
+ "hex": "2ea22c8020c71ddb3aac7f9b9e4bdacf032aaa8b8e4433c4ff9f8a43cebb9c1f5da96928a48103120c008203000401cc",
+ "reqSigs": 1,
+ "type": "cryptocondition",
+ "addresses": [
+ "RKWS7jxyjPX9iaJttk8iMKf1AumanKypez"
+ ]
+ }
+ change script: 2102aff51dad774a1c612dc82e63f85f07b992b665836b0f0efbcb26ee679f4f4848ac
+ 
+ sendtxid: cb5309ed249da95e2b5696eb763a8736e2fff1d14922ada737b931494ca3d2be
+ 
+ broadcast sendtxid and wait for it to be confirmed. then get the msg we need to sign:
+ 
+ ./c cclib calcmsg 18 \"[%22cb5309ed249da95e2b5696eb763a8736e2fff1d14922ada737b931494ca3d2be%22,%222102aff51dad774a1c612dc82e63f85f07b992b665836b0f0efbcb26ee679f4f4848ac%22]\"
+ 
+ {
+ "result": "success",
+ "msg": "63b799913d4c9487f321b32d6ae8614f653f38e0b50d4df4bc1d36339ea18485"
+ }
+
+*/
+
+
 #define USE_BASIC_CONFIG
 #define ENABLE_MODULE_MUSIG
 #include "../secp256k1/src/basic-config.h"
@@ -82,7 +128,6 @@ int32_t musig_msghash(uint8_t *msg,uint256 prevhash,int32_t prevn,CTxOut vout,CP
 {
     CScript data; uint256 hash; int32_t len = 0;
     data << E_MARSHAL(ss << prevhash << prevn << vout << pk);
-fprintf(stderr,"data size %d\n",(int32_t)data.size());
     hash = Hash(data.begin(),data.end());
     memcpy(msg,&hash,sizeof(hash));
     return(0);
@@ -137,7 +182,7 @@ UniValue musig_combine(uint64_t txfee,struct CCcontract_info *cp,cJSON *params)
         ctx = secp256k1_context_create(SECP256K1_CONTEXT_SIGN | SECP256K1_CONTEXT_VERIFY);
     if ( params != 0 && (n= cJSON_GetArraySize(params)) > 0 )
     {
-        fprintf(stderr,"n.%d args.(%s)\n",n,jprint(params,0));
+        //fprintf(stderr,"n.%d args.(%s)\n",n,jprint(params,0));
         for (i=0; i<n; i++)
         {
             if ( (hexstr= jstr(jitem(params,i),0)) != 0 && is_hexstr(hexstr,0) == 66 )