Convert "lock" example to a "swap" example

Performs an atomic swap leveraging Zeto, Noto, and Pente together.

Signed-off-by: Andrew Richardson <[email protected]>

example/swap/README.md

@@ -0,0 +1,46 @@
+# Example: Atomic Swap
+
+This example demonstrates an atomic swap scenario on Paladin. It performs a swap between:
+
+- a cash token implemented with Zeto
+- an asset token implemented with Noto, with private hooks implemented on Pente
+
+## Pre-requisites
+
+Requires a local 3-node Paladin cluster running on `localhost:31548`, `localhost:31648`, and `localhost:31748`.
+
+## Run standalone
+
+Compile [Solidity contracts](../../solidity):
+
+```shell
+cd ../../solidity
+npm install
+npm run compile
+```
+
+Build [TypeScript SDK](../../sdk/typescript):
+
+```shell
+cd ../../sdk/typescript
+npm install
+npm run abi
+npm run build
+```
+
+Run example:
+
+```shell
+npm install
+npm run abi
+npm run start
+```
+
+## Run with Gradle
+
+The following will perform all pre-requisites and then run the example:
+
+```shell
+../../gradlew build
+npm run start
+```

example/lock/package.json → example/swap/package.json

@@ -18,6 +18,7 @@
     "typescript": "^5.6.3"
   },
   "dependencies": {
-    "@lfdecentralizedtrust-labs/paladin-sdk": "file:../../sdk/typescript"
+    "@lfdecentralizedtrust-labs/paladin-sdk": "file:../../sdk/typescript",
+    "ethers": "^6.13.4"
   }
 }

example/swap/scripts/abi.mjs

@@ -0,0 +1,16 @@
+import { copyFile } from "copy-file";
+
+await copyFile(
+  "../../solidity/artifacts/contracts/private/NotoTrackerERC20.sol/NotoTrackerERC20.json",
+  "src/abis/NotoTrackerERC20.json"
+);
+
+await copyFile(
+  "../../solidity/artifacts/contracts/shared/Atom.sol/AtomFactory.json",
+  "src/abis/AtomFactory.json"
+);
+
+await copyFile(
+  "../../solidity/artifacts/contracts/shared/Atom.sol/Atom.json",
+  "src/abis/Atom.json"
+);