diff --git a/src/15_1_getmininginfo.c b/src/16_1_getmininginfo.c similarity index 100% rename from src/15_1_getmininginfo.c rename to src/16_1_getmininginfo.c diff --git a/src/15_1_testbitcoin.c b/src/16_1_testbitcoin.c similarity index 100% rename from src/15_1_testbitcoin.c rename to src/16_1_testbitcoin.c diff --git a/src/15_2_sendtoaddress.c b/src/16_2_sendtoaddress.c similarity index 100% rename from src/15_2_sendtoaddress.c rename to src/16_2_sendtoaddress.c diff --git a/src/15_3_chainlistener.c b/src/16_3_chainlistener.c similarity index 100% rename from src/15_3_chainlistener.c rename to src/16_3_chainlistener.c diff --git a/src/16_1_testwally.c b/src/17_1_testwally.c similarity index 100% rename from src/16_1_testwally.c rename to src/17_1_testwally.c diff --git a/src/16_2_genmnemonic.c b/src/17_2_genmnemonic.c similarity index 100% rename from src/16_2_genmnemonic.c rename to src/17_2_genmnemonic.c diff --git a/src/16_3_genhd.c b/src/17_3_genhd.c similarity index 100% rename from src/16_3_genhd.c rename to src/17_3_genhd.c diff --git a/src/16_4_createemptypsbt.c b/src/17_4_createemptypsbt.c similarity index 100% rename from src/16_4_createemptypsbt.c rename to src/17_4_createemptypsbt.c diff --git a/src/16_4_examinepsbt.c b/src/17_4_examinepsbt.c similarity index 100% rename from src/16_4_examinepsbt.c rename to src/17_4_examinepsbt.c diff --git a/src/16_5_replacewithscript.c b/src/17_5_replacewithscript.c similarity index 100% rename from src/16_5_replacewithscript.c rename to src/17_5_replacewithscript.c diff --git a/src/16_7_genhd_for_import.c b/src/17_7_genhd_for_import.c similarity index 100% rename from src/16_7_genhd_for_import.c rename to src/17_7_genhd_for_import.c diff --git a/src/17_1_blockinfo.go b/src/18_1_blockinfo.go similarity index 100% rename from src/17_1_blockinfo.go rename to src/18_1_blockinfo.go diff --git a/src/17_1_getaddress.go b/src/18_1_getaddress.go similarity index 100% rename from src/17_1_getaddress.go rename to src/18_1_getaddress.go diff --git a/src/17_1_getamountreceived.go b/src/18_1_getamountreceived.go similarity index 100% rename from src/17_1_getamountreceived.go rename to src/18_1_getamountreceived.go diff --git a/src/17_1_getbalance.go b/src/18_1_getbalance.go similarity index 100% rename from src/17_1_getbalance.go rename to src/18_1_getbalance.go diff --git a/src/17_1_lookuptransaction.go b/src/18_1_lookuptransaction.go similarity index 100% rename from src/17_1_lookuptransaction.go rename to src/18_1_lookuptransaction.go diff --git a/src/17_1_sendtransaction.go b/src/18_1_sendtransaction.go similarity index 100% rename from src/17_1_sendtransaction.go rename to src/18_1_sendtransaction.go diff --git a/src/17_2_App-getinfo.java b/src/18_2_App-getinfo.java similarity index 100% rename from src/17_2_App-getinfo.java rename to src/18_2_App-getinfo.java diff --git a/src/17_2_App-listen.java b/src/18_2_App-listen.java similarity index 100% rename from src/17_2_App-listen.java rename to src/18_2_App-listen.java diff --git a/src/17_2_App-sendtx.java b/src/18_2_App-sendtx.java similarity index 100% rename from src/17_2_App-sendtx.java rename to src/18_2_App-sendtx.java diff --git a/src/17_3_getinfo.js b/src/18_3_getinfo.js similarity index 100% rename from src/17_3_getinfo.js rename to src/18_3_getinfo.js diff --git a/src/17_3_sendtx.js b/src/18_3_sendtx.js similarity index 100% rename from src/17_3_sendtx.js rename to src/18_3_sendtx.js diff --git a/src/17_3_walletinfo.js b/src/18_3_walletinfo.js similarity index 100% rename from src/17_3_walletinfo.js rename to src/18_3_walletinfo.js diff --git a/src/17_4_getinfo.py b/src/18_4_getinfo.py similarity index 100% rename from src/17_4_getinfo.py rename to src/18_4_getinfo.py diff --git a/src/17_4_sendtx.py b/src/18_4_sendtx.py similarity index 100% rename from src/17_4_sendtx.py rename to src/18_4_sendtx.py diff --git a/src/17_4_walletinfo.py b/src/18_4_walletinfo.py similarity index 100% rename from src/17_4_walletinfo.py rename to src/18_4_walletinfo.py diff --git a/src/17_5_main-getinfo.rs b/src/18_5_main-getinfo.rs similarity index 100% rename from src/17_5_main-getinfo.rs rename to src/18_5_main-getinfo.rs diff --git a/src/17_5_main-sendtx.rs b/src/18_5_main-sendtx.rs similarity index 100% rename from src/17_5_main-sendtx.rs rename to src/18_5_main-sendtx.rs diff --git a/src/17_6_getinfo.playground b/src/18_6_getinfo.playground similarity index 100% rename from src/17_6_getinfo.playground rename to src/18_6_getinfo.playground diff --git a/src/17_6_sendtx.playground b/src/18_6_sendtx.playground similarity index 100% rename from src/17_6_sendtx.playground rename to src/18_6_sendtx.playground