xmrswap: Work on testnet. (#2942)

* xmrswap: Make separate clients.

* xmrswap: Work on testnet.

.gitignore

@@ -50,4 +50,5 @@ client/cmd/translationsreport/worksheets
 server/cmd/dexadm/dexadm
 client/tor/build
 server/cmd/geogame/geogame
-internal/libsecp256k1/secp256k1
+internal/cmd/xmrswap/xmrswap
+internal/cmd/xmrswap/config.json

internal/cmd/xmrswap/README.md

@@ -0,0 +1,29 @@
+## Intro
+
+xmrswap performs adaptor signature swaps between dcr and xmr. There are four
+tests; success, Alice bails before xmr init, refund, and Bob bails after xmr init.
+
+## Requirements
+
+dcrd, dcrwallet, dcrctl, monerod, monero-wallet-rpc, and monero-wallet-cli
+
+## Simnet
+
+Simnet requires that the dcr and xmr harnesses in /dcrdex/dex/testing be running.
+
+## Testnet
+
+Testnet requires a synced monerod running on --stagenet. It also requires three
+monero-wallet-rpc running. Two of these must have wallets loaded, and
+unlocked (--wallet-file). Alice must be funded. The third only needs to be
+pointed to a directory (--wallet-dir).
+
+It also requires two dcrd running on --testnet with bob being funded and unlocked.
+
+The file example-config.json must be copied to config.json and correct locations
+for your system filled in.
+
+Testnet tests can be run with the --testnet flag.
+
+Testnet tests take a long time to finish as they wait on monero funds being
+available and dcr confirmations.

internal/cmd/xmrswap/example-config.json

@@ -0,0 +1,11 @@
+{
+        "alice": {
+            "xmrhost": "http://127.0.0.1:28284/json_rpc",
+            "dcrconf": "/home/me/dextest/dcr/trading1/trading1.conf"
+        },
+        "bob": {
+            "xmrhost": "http://127.0.0.1:28184/json_rpc",
+            "dcrconf": "/home/me/dextest/dcr/trading2/trading2.conf"
+        },
+        "extraxmrhost": "http://127.0.0.1:28484/json_rpc"
+    }