diff --git a/dex/testing/btc/README.md b/dex/testing/btc/README.md
index 24272c5510..2898706524 100644
--- a/dex/testing/btc/README.md
+++ b/dex/testing/btc/README.md
@@ -1,7 +1,7 @@
 # BTC Simnet Test Harness
-The harness script will create three connected regnet nodes and wallets, and
+The harness script will create two connected regnet nodes with four wallets, and
 then mine some blocks and send some BTC around. The result is a set of wallets
-named **alpha**, **beta**, and **gamma**, each with slightly different
+named **alpha**, **beta**, **gamma**, and **delta**, each with slightly different
 properties.
 
 **Beta** is purely a mining node/wallet and has never sent a transaction. Beta
@@ -11,15 +11,17 @@ does have some mature coinbase transaction outputs to spend.
 so has some change outputs that are not coinbase and have varying number of
 confirmations.
 
-**Gamma** is another wallet on the alpha node. Gamma is encrypted, so requires
-unlocking for sensitive operations. Gamma has no coinbase-spending outputs,
-but has a number of UTXOs of varying size and confirmation count.
-**The gamma wallet password is "abc"**.
+**Gamma** is another wallet on the alpha node. Gamma has no coinbase-spending
+outputs, but has a number of UTXOs of varying size and confirmation count.
+
+**Delta** is another wallet on the beta node, similar to gamma.
+
+**The wallet password is "abc"** for encrypted wallets.
 
 ## Dependencies
 
 You must have [bitcoind and bitcoin-cli](https://github.com/bitcoin/bitcoin/releases)
-in `PATH` to use the harness. bitcoin v26.0.0+ is recommended.
+in `PATH` to use the harness. Bitcoin Core v26.0.0+ is recommended. v30+ is fully supported.
 
 It also requires tmux.
 
@@ -29,8 +31,8 @@ The `./harness.sh` script will drop you into a tmux window in a directory
 called `harness-ctl`. Inside of this directory are a number of scripts to
 allow you to perform RPC calls against each wallet.
 
-`./alpha`, `./beta`, and `./gamma` are just `bitcoin-cli` configured for their
-respective wallets.
+`./alpha`, `./beta`, `./gamma`, and `./delta` are just `bitcoin-cli` configured
+for their respective wallets.
 Try `./gamma getbalance`, for example.
 
 `./reorg` will step through a script that causes the alpha node to undergo a
@@ -38,6 +40,19 @@ Try `./gamma getbalance`, for example.
 
 `./quit` shuts down the nodes and closes the tmux session.
 
+## Regenerating Descriptor Files
+
+If you need to regenerate the `desc-*.json` files (e.g., after changing wallet
+configuration), use the `gen-descriptors.sh` script:
+
+```bash
+# Start a Bitcoin Core node first, then run:
+./gen-descriptors.sh [RPC_PORT]
+```
+
+This will create new descriptor files and output the corresponding addresses
+to update in `harness.sh`.
+
 ## Dev Stuff
 
 If things aren't looking right, you may need to look at the node windows to
diff --git a/dex/testing/btc/desc-alpha.json b/dex/testing/btc/desc-alpha.json
new file mode 100644
index 0000000000..8c79a63025
--- /dev/null
+++ b/dex/testing/btc/desc-alpha.json
@@ -0,0 +1 @@
+[{"desc":"pkh(tprv8ZgxMBicQKsPd6K7HPaoxQmGnC43xV2qw9U5SsuvaS9A5JKj3yxSCTxjUyhLWMyEiN89msKcjiftHB6Rz8v7fvfLKuU52rCYy9EvYeC7MXV/44h/1h/0h/0/*)#qc049l39","timestamp":"now","active":true,"internal":false,"range":[0,999],"next":0},{"desc":"pkh(tprv8ZgxMBicQKsPd6K7HPaoxQmGnC43xV2qw9U5SsuvaS9A5JKj3yxSCTxjUyhLWMyEiN89msKcjiftHB6Rz8v7fvfLKuU52rCYy9EvYeC7MXV/44h/1h/0h/1/*)#3v25c2pa","timestamp":"now","active":true,"internal":true,"range":[0,999],"next":0},{"desc":"sh(wpkh(tprv8ZgxMBicQKsPd6K7HPaoxQmGnC43xV2qw9U5SsuvaS9A5JKj3yxSCTxjUyhLWMyEiN89msKcjiftHB6Rz8v7fvfLKuU52rCYy9EvYeC7MXV/49h/1h/0h/0/*))#edynh5ze","timestamp":"now","active":true,"internal":false,"range":[0,999],"next":0},{"desc":"sh(wpkh(tprv8ZgxMBicQKsPd6K7HPaoxQmGnC43xV2qw9U5SsuvaS9A5JKj3yxSCTxjUyhLWMyEiN89msKcjiftHB6Rz8v7fvfLKuU52rCYy9EvYeC7MXV/49h/1h/0h/1/*))#lwvkvefd","timestamp":"now","active":true,"internal":true,"range":[0,999],"next":0},{"desc":"tr(tprv8ZgxMBicQKsPd6K7HPaoxQmGnC43xV2qw9U5SsuvaS9A5JKj3yxSCTxjUyhLWMyEiN89msKcjiftHB6Rz8v7fvfLKuU52rCYy9EvYeC7MXV/86h/1h/0h/0/*)#f8rt6k6w","timestamp":"now","active":true,"internal":false,"range":[0,999],"next":0},{"desc":"tr(tprv8ZgxMBicQKsPd6K7HPaoxQmGnC43xV2qw9U5SsuvaS9A5JKj3yxSCTxjUyhLWMyEiN89msKcjiftHB6Rz8v7fvfLKuU52rCYy9EvYeC7MXV/86h/1h/0h/1/*)#cnx28r2k","timestamp":"now","active":true,"internal":true,"range":[0,999],"next":0},{"desc":"wpkh(tprv8ZgxMBicQKsPd6K7HPaoxQmGnC43xV2qw9U5SsuvaS9A5JKj3yxSCTxjUyhLWMyEiN89msKcjiftHB6Rz8v7fvfLKuU52rCYy9EvYeC7MXV/84h/1h/0h/0/*)#5e2fkn6t","timestamp":"now","active":true,"internal":false,"range":[0,999],"next":0},{"desc":"wpkh(tprv8ZgxMBicQKsPd6K7HPaoxQmGnC43xV2qw9U5SsuvaS9A5JKj3yxSCTxjUyhLWMyEiN89msKcjiftHB6Rz8v7fvfLKuU52rCYy9EvYeC7MXV/84h/1h/0h/1/*)#9d0gtx2n","timestamp":"now","active":true,"internal":true,"range":[0,999],"next":0}]
diff --git a/dex/testing/btc/desc-beta.json b/dex/testing/btc/desc-beta.json
index a2465861ab..665512d029 100644
--- a/dex/testing/btc/desc-beta.json
+++ b/dex/testing/btc/desc-beta.json
@@ -1 +1 @@
-[{"desc":"pkh(tprv8ZgxMBicQKsPeEJskbB5M2i3VL5wHcbZWiHV9bqsaWWFbYGVSzu6GYpkHtXrVD9QAe773xwYcjfb1jZMcShNofV18USL6h9e6rqSLdekxkp/44'/1'/0'/0/*)#xep6cuqj","timestamp":1655751807,"active":true,"internal":false,"range":[0,999],"next":1},{"desc":"sh(wpkh(tprv8ZgxMBicQKsPeEJskbB5M2i3VL5wHcbZWiHV9bqsaWWFbYGVSzu6GYpkHtXrVD9QAe773xwYcjfb1jZMcShNofV18USL6h9e6rqSLdekxkp/49'/1'/0'/0/*))#amcg4nny","timestamp":1655751807,"active":true,"internal":false,"range":[0,999],"next":0},{"desc":"wpkh(tprv8ZgxMBicQKsPeEJskbB5M2i3VL5wHcbZWiHV9bqsaWWFbYGVSzu6GYpkHtXrVD9QAe773xwYcjfb1jZMcShNofV18USL6h9e6rqSLdekxkp/84'/1'/0'/0/*)#y3dnm4x9","timestamp":1655751807,"active":true,"internal":false,"range":[0,999],"next":1},{"desc":"tr(tprv8ZgxMBicQKsPeEJskbB5M2i3VL5wHcbZWiHV9bqsaWWFbYGVSzu6GYpkHtXrVD9QAe773xwYcjfb1jZMcShNofV18USL6h9e6rqSLdekxkp/86'/1'/0'/0/*)#dx02vsaf","timestamp":1655751807,"active":true,"internal":false,"range":[0,999],"next":0},{"desc":"pkh(tprv8ZgxMBicQKsPeEJskbB5M2i3VL5wHcbZWiHV9bqsaWWFbYGVSzu6GYpkHtXrVD9QAe773xwYcjfb1jZMcShNofV18USL6h9e6rqSLdekxkp/44'/1'/0'/1/*)#hdym9fs2","timestamp":1655751807,"active":true,"internal":true,"range":[0,999],"next":0},{"desc":"sh(wpkh(tprv8ZgxMBicQKsPeEJskbB5M2i3VL5wHcbZWiHV9bqsaWWFbYGVSzu6GYpkHtXrVD9QAe773xwYcjfb1jZMcShNofV18USL6h9e6rqSLdekxkp/49'/1'/0'/1/*))#mcsdw7cs","timestamp":1655751807,"active":true,"internal":true,"range":[0,999],"next":0},{"desc":"wpkh(tprv8ZgxMBicQKsPeEJskbB5M2i3VL5wHcbZWiHV9bqsaWWFbYGVSzu6GYpkHtXrVD9QAe773xwYcjfb1jZMcShNofV18USL6h9e6rqSLdekxkp/84'/1'/0'/1/*)#49gjxqka","timestamp":1655751807,"active":true,"internal":true,"range":[0,999],"next":0},{"desc":"tr(tprv8ZgxMBicQKsPeEJskbB5M2i3VL5wHcbZWiHV9bqsaWWFbYGVSzu6GYpkHtXrVD9QAe773xwYcjfb1jZMcShNofV18USL6h9e6rqSLdekxkp/86'/1'/0'/1/*)#uj2t39d3","timestamp":1655751807,"active":true,"internal":true,"range":[0,999],"next":0}]
+[{"desc":"pkh(tprv8ZgxMBicQKsPeyeXQGRzVYafa4YWL47Rc2fBzCCB9CQoLh4iXLV5jJLX6brunv2Qo4fgP61wqtQbAU6iWydfhqeFudM8d511SHF197Mh6Wi/44h/1h/0h/0/*)#v08w9npt","timestamp":"now","active":true,"internal":false,"range":[0,999],"next":0},{"desc":"pkh(tprv8ZgxMBicQKsPeyeXQGRzVYafa4YWL47Rc2fBzCCB9CQoLh4iXLV5jJLX6brunv2Qo4fgP61wqtQbAU6iWydfhqeFudM8d511SHF197Mh6Wi/44h/1h/0h/1/*)#amz0cx3n","timestamp":"now","active":true,"internal":true,"range":[0,999],"next":0},{"desc":"sh(wpkh(tprv8ZgxMBicQKsPeyeXQGRzVYafa4YWL47Rc2fBzCCB9CQoLh4iXLV5jJLX6brunv2Qo4fgP61wqtQbAU6iWydfhqeFudM8d511SHF197Mh6Wi/49h/1h/0h/0/*))#zgm8ymm0","timestamp":"now","active":true,"internal":false,"range":[0,999],"next":0},{"desc":"sh(wpkh(tprv8ZgxMBicQKsPeyeXQGRzVYafa4YWL47Rc2fBzCCB9CQoLh4iXLV5jJLX6brunv2Qo4fgP61wqtQbAU6iWydfhqeFudM8d511SHF197Mh6Wi/49h/1h/0h/1/*))#ytnzlksm","timestamp":"now","active":true,"internal":true,"range":[0,999],"next":0},{"desc":"tr(tprv8ZgxMBicQKsPeyeXQGRzVYafa4YWL47Rc2fBzCCB9CQoLh4iXLV5jJLX6brunv2Qo4fgP61wqtQbAU6iWydfhqeFudM8d511SHF197Mh6Wi/86h/1h/0h/0/*)#fe6yrppt","timestamp":"now","active":true,"internal":false,"range":[0,999],"next":0},{"desc":"tr(tprv8ZgxMBicQKsPeyeXQGRzVYafa4YWL47Rc2fBzCCB9CQoLh4iXLV5jJLX6brunv2Qo4fgP61wqtQbAU6iWydfhqeFudM8d511SHF197Mh6Wi/86h/1h/0h/1/*)#cdl9753n","timestamp":"now","active":true,"internal":true,"range":[0,999],"next":0},{"desc":"wpkh(tprv8ZgxMBicQKsPeyeXQGRzVYafa4YWL47Rc2fBzCCB9CQoLh4iXLV5jJLX6brunv2Qo4fgP61wqtQbAU6iWydfhqeFudM8d511SHF197Mh6Wi/84h/1h/0h/0/*)#n23jpl8l","timestamp":"now","active":true,"internal":false,"range":[0,999],"next":0},{"desc":"wpkh(tprv8ZgxMBicQKsPeyeXQGRzVYafa4YWL47Rc2fBzCCB9CQoLh4iXLV5jJLX6brunv2Qo4fgP61wqtQbAU6iWydfhqeFudM8d511SHF197Mh6Wi/84h/1h/0h/1/*)#z75nu2h8","timestamp":"now","active":true,"internal":true,"range":[0,999],"next":0}]
diff --git a/dex/testing/btc/desc-delta.json b/dex/testing/btc/desc-delta.json
new file mode 100644
index 0000000000..8d332bbdb7
--- /dev/null
+++ b/dex/testing/btc/desc-delta.json
@@ -0,0 +1 @@
+[{"desc":"pkh(tprv8ZgxMBicQKsPdhobdXkAnzvpwgaiM4jzWvV22Ne35bK1hGJ9yR9uwgmYWEg31KTADZwrHbuDTb3bKDkQ9DQuAhvNnYYLL4HqBrSp1M3eQWt/44h/1h/0h/0/*)#y0c0vkn6","timestamp":"now","active":true,"internal":false,"range":[0,999],"next":0},{"desc":"pkh(tprv8ZgxMBicQKsPdhobdXkAnzvpwgaiM4jzWvV22Ne35bK1hGJ9yR9uwgmYWEg31KTADZwrHbuDTb3bKDkQ9DQuAhvNnYYLL4HqBrSp1M3eQWt/44h/1h/0h/1/*)#4maw3rrz","timestamp":"now","active":true,"internal":true,"range":[0,999],"next":0},{"desc":"sh(wpkh(tprv8ZgxMBicQKsPdhobdXkAnzvpwgaiM4jzWvV22Ne35bK1hGJ9yR9uwgmYWEg31KTADZwrHbuDTb3bKDkQ9DQuAhvNnYYLL4HqBrSp1M3eQWt/49h/1h/0h/0/*))#r4ec7vhq","timestamp":"now","active":true,"internal":false,"range":[0,999],"next":0},{"desc":"sh(wpkh(tprv8ZgxMBicQKsPdhobdXkAnzvpwgaiM4jzWvV22Ne35bK1hGJ9yR9uwgmYWEg31KTADZwrHbuDTb3bKDkQ9DQuAhvNnYYLL4HqBrSp1M3eQWt/49h/1h/0h/1/*))#9k3a9pu5","timestamp":"now","active":true,"internal":true,"range":[0,999],"next":0},{"desc":"tr(tprv8ZgxMBicQKsPdhobdXkAnzvpwgaiM4jzWvV22Ne35bK1hGJ9yR9uwgmYWEg31KTADZwrHbuDTb3bKDkQ9DQuAhvNnYYLL4HqBrSp1M3eQWt/86h/1h/0h/0/*)#5l3xshvg","timestamp":"now","active":true,"internal":false,"range":[0,999],"next":0},{"desc":"tr(tprv8ZgxMBicQKsPdhobdXkAnzvpwgaiM4jzWvV22Ne35bK1hGJ9yR9uwgmYWEg31KTADZwrHbuDTb3bKDkQ9DQuAhvNnYYLL4HqBrSp1M3eQWt/86h/1h/0h/1/*)#9t58dzus","timestamp":"now","active":true,"internal":true,"range":[0,999],"next":0},{"desc":"wpkh(tprv8ZgxMBicQKsPdhobdXkAnzvpwgaiM4jzWvV22Ne35bK1hGJ9yR9uwgmYWEg31KTADZwrHbuDTb3bKDkQ9DQuAhvNnYYLL4HqBrSp1M3eQWt/84h/1h/0h/0/*)#pj6g5485","timestamp":"now","active":true,"internal":false,"range":[0,999],"next":0},{"desc":"wpkh(tprv8ZgxMBicQKsPdhobdXkAnzvpwgaiM4jzWvV22Ne35bK1hGJ9yR9uwgmYWEg31KTADZwrHbuDTb3bKDkQ9DQuAhvNnYYLL4HqBrSp1M3eQWt/84h/1h/0h/1/*)#sxlffqhv","timestamp":"now","active":true,"internal":true,"range":[0,999],"next":0}]
diff --git a/dex/testing/btc/desc-gamma.json b/dex/testing/btc/desc-gamma.json
index c3646e33d8..80ba70afb2 100644
--- a/dex/testing/btc/desc-gamma.json
+++ b/dex/testing/btc/desc-gamma.json
@@ -1 +1 @@
-[{"desc":"pkh(tprv8ZgxMBicQKsPf7ZAtR3ggoFn1RhD7i5GupkFVfsKCSCBEgb2scmPUmFMf2dMx5djtHDit3aWTAPQGnkR9QNx2uiB8kMSVgjDoD1p7ynHtyz/44'/1'/0'/0/*)#wg4x3eld","timestamp":1655755384,"active":true,"internal":false,"range":[0,999],"next":0},{"desc":"sh(wpkh(tprv8ZgxMBicQKsPf7ZAtR3ggoFn1RhD7i5GupkFVfsKCSCBEgb2scmPUmFMf2dMx5djtHDit3aWTAPQGnkR9QNx2uiB8kMSVgjDoD1p7ynHtyz/49'/1'/0'/0/*))#8r2f8dxp","timestamp":1655755384,"active":true,"internal":false,"range":[0,999],"next":0},{"desc":"wpkh(tprv8ZgxMBicQKsPf7ZAtR3ggoFn1RhD7i5GupkFVfsKCSCBEgb2scmPUmFMf2dMx5djtHDit3aWTAPQGnkR9QNx2uiB8kMSVgjDoD1p7ynHtyz/84'/1'/0'/0/*)#2mqfus42","timestamp":1655755384,"active":true,"internal":false,"range":[0,999],"next":0},{"desc":"tr(tprv8ZgxMBicQKsPf7ZAtR3ggoFn1RhD7i5GupkFVfsKCSCBEgb2scmPUmFMf2dMx5djtHDit3aWTAPQGnkR9QNx2uiB8kMSVgjDoD1p7ynHtyz/86'/1'/0'/0/*)#ege8qf0x","timestamp":1655755384,"active":true,"internal":false,"range":[0,999],"next":0},{"desc":"pkh(tprv8ZgxMBicQKsPf7ZAtR3ggoFn1RhD7i5GupkFVfsKCSCBEgb2scmPUmFMf2dMx5djtHDit3aWTAPQGnkR9QNx2uiB8kMSVgjDoD1p7ynHtyz/44'/1'/0'/1/*)#lus8vv04","timestamp":1655755384,"active":true,"internal":true,"range":[0,999],"next":0},{"desc":"sh(wpkh(tprv8ZgxMBicQKsPf7ZAtR3ggoFn1RhD7i5GupkFVfsKCSCBEgb2scmPUmFMf2dMx5djtHDit3aWTAPQGnkR9QNx2uiB8kMSVgjDoD1p7ynHtyz/49'/1'/0'/1/*))#pqzvuqd4","timestamp":1655755385,"active":true,"internal":true,"range":[0,999],"next":0},{"desc":"wpkh(tprv8ZgxMBicQKsPf7ZAtR3ggoFn1RhD7i5GupkFVfsKCSCBEgb2scmPUmFMf2dMx5djtHDit3aWTAPQGnkR9QNx2uiB8kMSVgjDoD1p7ynHtyz/84'/1'/0'/1/*)#m09gp99j","timestamp":1655755385,"active":true,"internal":true,"range":[0,999],"next":0},{"desc":"tr(tprv8ZgxMBicQKsPf7ZAtR3ggoFn1RhD7i5GupkFVfsKCSCBEgb2scmPUmFMf2dMx5djtHDit3aWTAPQGnkR9QNx2uiB8kMSVgjDoD1p7ynHtyz/86'/1'/0'/1/*)#guuxaul7","timestamp":1655755385,"active":true,"internal":true,"range":[0,999],"next":0}]
+[{"desc":"pkh(tprv8ZgxMBicQKsPdLVb1ZPPcJp5LpsPaC9opAiqLoCFmqoiHN2YiyJUTfAAro8mfpeieCWRb1hVP4SbqejtNgnj5MqyJpPB3qJ47h7bZEtkZoK/44h/1h/0h/0/*)#aa0p74f6","timestamp":"now","active":true,"internal":false,"range":[0,999],"next":0},{"desc":"pkh(tprv8ZgxMBicQKsPdLVb1ZPPcJp5LpsPaC9opAiqLoCFmqoiHN2YiyJUTfAAro8mfpeieCWRb1hVP4SbqejtNgnj5MqyJpPB3qJ47h7bZEtkZoK/44h/1h/0h/1/*)#vf2qrqez","timestamp":"now","active":true,"internal":true,"range":[0,999],"next":0},{"desc":"sh(wpkh(tprv8ZgxMBicQKsPdLVb1ZPPcJp5LpsPaC9opAiqLoCFmqoiHN2YiyJUTfAAro8mfpeieCWRb1hVP4SbqejtNgnj5MqyJpPB3qJ47h7bZEtkZoK/49h/1h/0h/0/*))#tvht38gv","timestamp":"now","active":true,"internal":false,"range":[0,999],"next":0},{"desc":"sh(wpkh(tprv8ZgxMBicQKsPdLVb1ZPPcJp5LpsPaC9opAiqLoCFmqoiHN2YiyJUTfAAro8mfpeieCWRb1hVP4SbqejtNgnj5MqyJpPB3qJ47h7bZEtkZoK/49h/1h/0h/1/*))#d0lw22rc","timestamp":"now","active":true,"internal":true,"range":[0,999],"next":0},{"desc":"tr(tprv8ZgxMBicQKsPdLVb1ZPPcJp5LpsPaC9opAiqLoCFmqoiHN2YiyJUTfAAro8mfpeieCWRb1hVP4SbqejtNgnj5MqyJpPB3qJ47h7bZEtkZoK/86h/1h/0h/0/*)#x5hnk8ty","timestamp":"now","active":true,"internal":false,"range":[0,999],"next":0},{"desc":"tr(tprv8ZgxMBicQKsPdLVb1ZPPcJp5LpsPaC9opAiqLoCFmqoiHN2YiyJUTfAAro8mfpeieCWRb1hVP4SbqejtNgnj5MqyJpPB3qJ47h7bZEtkZoK/86h/1h/0h/1/*)#hqjjtjmu","timestamp":"now","active":true,"internal":true,"range":[0,999],"next":0},{"desc":"wpkh(tprv8ZgxMBicQKsPdLVb1ZPPcJp5LpsPaC9opAiqLoCFmqoiHN2YiyJUTfAAro8mfpeieCWRb1hVP4SbqejtNgnj5MqyJpPB3qJ47h7bZEtkZoK/84h/1h/0h/0/*)#w5pp088a","timestamp":"now","active":true,"internal":false,"range":[0,999],"next":0},{"desc":"wpkh(tprv8ZgxMBicQKsPdLVb1ZPPcJp5LpsPaC9opAiqLoCFmqoiHN2YiyJUTfAAro8mfpeieCWRb1hVP4SbqejtNgnj5MqyJpPB3qJ47h7bZEtkZoK/84h/1h/0h/1/*)#lqyqjjh9","timestamp":"now","active":true,"internal":true,"range":[0,999],"next":0}]
diff --git a/dex/testing/btc/gen-descriptors.sh b/dex/testing/btc/gen-descriptors.sh
new file mode 100755
index 0000000000..ecabf55b79
--- /dev/null
+++ b/dex/testing/btc/gen-descriptors.sh
@@ -0,0 +1,121 @@
+#!/usr/bin/env bash
+# Generate descriptor JSON files for BTC testing harness using Bitcoin Core RPC.
+# This script creates desc-{alpha,beta,gamma,delta}.json with correct checksums.
+#
+# Prerequisites:
+#   - Bitcoin Core running on regtest (run harness.sh first, or start manually)
+#   - bitcoin-cli available in PATH
+#   - python3 available in PATH
+#
+# Usage: ./gen-descriptors.sh [RPC_PORT]
+#   RPC_PORT defaults to 20556 (alpha node)
+
+set -e
+
+RPC_PORT="${1:-20556}"
+RPC_USER="user"
+RPC_PASS="pass"
+
+CLI="bitcoin-cli -regtest=1 -rpcport=${RPC_PORT} -rpcuser=${RPC_USER} -rpcpassword=${RPC_PASS}"
+
+echo "=== BTC Descriptor Generator ==="
+echo "Using RPC port: ${RPC_PORT}"
+echo ""
+
+# Check if Bitcoin Core is running
+if ! ${CLI} getblockchaininfo &>/dev/null; then
+    echo "ERROR: Bitcoin Core not running on port ${RPC_PORT}"
+    echo "Please start the harness first or run bitcoind manually:"
+    echo "  bitcoind -regtest -rpcport=${RPC_PORT} -rpcuser=${RPC_USER} -rpcpassword=${RPC_PASS}"
+    exit 1
+fi
+
+echo "Bitcoin Core is running. Generating descriptors..."
+echo ""
+
+# Function to generate descriptor file for a wallet
+generate_wallet_descriptors() {
+    local wallet_name="$1"
+    local output_file="$2"
+    local temp_wallet="_gen_${wallet_name}_$$"
+
+    echo "Generating descriptors for ${wallet_name}..."
+
+    # Create temporary descriptor wallet
+    ${CLI} createwallet "${temp_wallet}" false false "" false true >/dev/null 2>&1 || {
+        # Wallet might already exist, try to load it
+        ${CLI} loadwallet "${temp_wallet}" >/dev/null 2>&1 || true
+    }
+
+    # Export descriptors with private keys
+    local descriptors=$(${CLI} -rpcwallet="${temp_wallet}" listdescriptors true)
+
+    # Get the first bech32 address (wpkh - BIP84)
+    local address=$(${CLI} -rpcwallet="${temp_wallet}" getnewaddress "" "bech32")
+
+    # Convert to importdescriptors format
+    echo "${descriptors}" | python3 -c "
+import json, sys
+data = json.load(sys.stdin)
+result = []
+for d in data['descriptors']:
+    result.append({
+        'desc': d['desc'],
+        'timestamp': 'now',
+        'active': d['active'],
+        'internal': d['internal'],
+        'range': d['range'],
+        'next': d.get('next', 0)
+    })
+print(json.dumps(result, separators=(',',':')))
+" > "${output_file}"
+
+    echo "  -> ${output_file}"
+    echo "  -> Address: ${address}"
+
+    # Unload and delete temporary wallet
+    ${CLI} unloadwallet "${temp_wallet}" >/dev/null 2>&1 || true
+
+    # Return address via global variable (bash limitation)
+    GENERATED_ADDRESS="${address}"
+}
+
+# Generate descriptors for all wallets (macOS bash 3.x compatible)
+generate_wallet_descriptors "alpha" "desc-alpha.json"
+ALPHA_ADDR="${GENERATED_ADDRESS}"
+
+generate_wallet_descriptors "beta" "desc-beta.json"
+BETA_ADDR="${GENERATED_ADDRESS}"
+
+generate_wallet_descriptors "gamma" "desc-gamma.json"
+GAMMA_ADDR="${GENERATED_ADDRESS}"
+
+generate_wallet_descriptors "delta" "desc-delta.json"
+DELTA_ADDR="${GENERATED_ADDRESS}"
+
+echo ""
+echo "=========================================="
+echo "GENERATED FILES:"
+echo "=========================================="
+ls -la desc-*.json
+echo ""
+
+echo "=========================================="
+echo "UPDATE harness.sh WITH THESE VALUES:"
+echo "=========================================="
+echo ""
+echo "export ALPHA_MINING_ADDR=\"${ALPHA_ADDR}\""
+echo "export BETA_MINING_ADDR=\"${BETA_ADDR}\""
+echo "export GAMMA_ADDRESS=\"${GAMMA_ADDR}\""
+echo "export DELTA_ADDRESS=\"${DELTA_ADDR}\""
+echo ""
+
+echo "=========================================="
+echo "IMPORTANT NOTES:"
+echo "=========================================="
+echo "1. Commit the generated desc-*.json files to the repository"
+echo "2. Update harness.sh with the addresses above"
+echo "3. Remove any existing harnesschain.tar.gz"
+echo "4. Bump HARNESS_VER in harness.sh"
+echo ""
+echo "Done!"
diff --git a/dex/testing/btc/harness.sh b/dex/testing/btc/harness.sh
index 757acb5f8d..bbc4c18b47 100755
--- a/dex/testing/btc/harness.sh
+++ b/dex/testing/btc/harness.sh
@@ -9,28 +9,26 @@ export BETA_LISTEN_PORT="20576"
 export ALPHA_RPC_PORT="20556"
 export BETA_RPC_PORT="20557"
 export WALLET_PASSWORD="abc"
-# For a descriptor wallet (no seed), a [wallet_name]-desc.json file is used with
+# For a descriptor wallet, a [wallet_name]-desc.json file is used with
 # importdescriptors to set the wallet keys.
-export ALPHA_WALLET_SEED="cMndqchcXSCUQDDZQSKU2cUHbPb5UfFL9afspxsBELeE6qx6ac9n"
-export ALPHA_MINING_ADDR="bcrt1qy7agjj62epx0ydnqskgwlcfwu52xjtpj36hr0d"
-export BETA_MINING_ADDR="bcrt1q8hzxze4zrjtpm27lrlanc20uhtswteye8ad7gx"
+# Note: Legacy wallet seeds removed for Bitcoin Core v30+ compatibility.
+# Use gen-descriptors.sh to regenerate descriptor files if needed.
+export ALPHA_MINING_ADDR="bcrt1qly8tvjf0ss0l596k296uanmqe9h2u38cjrju0n"
+export BETA_MINING_ADDR="bcrt1qcf5c4rtdlkmavg7spmh0h23k5egyqdqe9fg2d2"
 # Gamma is a named wallet in the alpha wallet directory.
-export GAMMA_ADDRESS="bcrt1qt2xf2s5dkm4t34zm69w9my2dhwmnskwv4st3ly"
+export GAMMA_ADDRESS="bcrt1q2zv5qg4j2khhmz2v0hqxduyw547a39w40jvg4h"
 # Delta is a named wallet in the beta wallet directory.
-export DELTA_WALLET_SEED="cURsyTZ8icuTHwWxSfTC2Geu2F6dMRtnzt1gvSaxHdc9Zf6eviJN"
-export DELTA_ADDRESS="bcrt1q4clywna5re22qh9mexqty8u8mqvhjh8cwhp5ms"
+export DELTA_ADDRESS="bcrt1qp04ul2s506fjcq5p2wf0lkq5qln85clryxks2l"
 export EXTRA_ARGS="--blockfilterindex --peerblockfilters --rpcbind=0.0.0.0 --rpcallowip=0.0.0.0/0"
 export CREATE_DEFAULT_WALLET="1"
-export VERSION_26_TEMP_DEPRICATED_DBD="1"
-
 
 # The new-wallet script creates a new wallet with keys (not blank), and no
 # passphrase. $1 is the node to create the wallet on, $2 is the wallet
 # passphrase, and $3 (optional) is true/false for a descriptor wallet.
 # For reference, possible arguments to createwallet are:
 # "wallet_name" ( disable_private_keys blank(boolean) "passphrase" avoid_reuse descriptors load_on_startup external_signer )
-export NEW_WALLET_CMD="./\$1 -named createwallet wallet_name=\$2 descriptors=\${3:-false} load_on_startup=true"
+export NEW_WALLET_CMD="./\$1 -named createwallet wallet_name=\$2 descriptors=\${3:-true} load_on_startup=true"
 
 # Run the harness
-export HARNESS_VER="1" # for outdated chain archive detection
+export HARNESS_VER="3" # descriptor wallets with correct checksums
 ./base-harness.sh