Merge pull request #5624 from BitGo/BTC-1826.baby-staking-transactions

feat(utxo-staking): Add single key finality provider script generation

Author: OttoAllmendinger

modules/abstract-utxo/package.json

@@ -48,7 +48,7 @@
     "@bitgo/unspents": "^0.47.18",
     "@bitgo/utxo-core": "^1.3.0",
     "@bitgo/utxo-lib": "^11.2.2",
-    "@bitgo/wasm-miniscript": "2.0.0-beta.4",
+    "@bitgo/wasm-miniscript": "2.0.0-beta.6",
     "@types/bluebird": "^3.5.25",
     "@types/lodash": "^4.14.121",
     "@types/superagent": "4.1.15",

modules/utxo-bin/package.json

@@ -30,7 +30,7 @@
     "@bitgo/statics": "^51.0.1",
     "@bitgo/unspents": "^0.47.18",
     "@bitgo/utxo-lib": "^11.2.2",
-    "@bitgo/wasm-miniscript": "2.0.0-beta.4",
+    "@bitgo/wasm-miniscript": "2.0.0-beta.6",
     "@noble/curves": "1.8.1",
     "archy": "^1.0.0",
     "bech32": "^2.0.0",

modules/utxo-core/package.json

@@ -53,7 +53,7 @@
   "dependencies": {
     "@bitgo/unspents": "^0.47.18",
     "@bitgo/utxo-lib": "^11.2.2",
-    "@bitgo/wasm-miniscript": "2.0.0-beta.4",
+    "@bitgo/wasm-miniscript": "2.0.0-beta.6",
     "bip174": "npm:@bitgo-forks/[email protected]"
   },
   "gitHead": "18e460ddf02de2dbf13c2aa243478188fb539f0c"

modules/utxo-staking/.prettierignore

@@ -1,3 +1,4 @@
 .nyc_output/
 dist/
+test/fixtures
 test/unit/babylon/vendor/btc-staking-ts

modules/utxo-staking/package.json

@@ -42,7 +42,7 @@
     "@bitgo/unspents": "^0.47.18",
     "@bitgo/utxo-core": "^1.3.0",
     "@bitgo/utxo-lib": "^11.2.2",
-    "@bitgo/wasm-miniscript": "2.0.0-beta.4"
+    "@bitgo/wasm-miniscript": "2.0.0-beta.6"
   },
   "devDependencies": {
     "bip174": "=2.1.1",

modules/utxo-staking/src/babylon/descriptor.ts

@@ -11,7 +11,7 @@ function pk(b: Buffer): ast.MiniscriptNode {
 }
 
 function sortedKeys(keys: Buffer[]): Buffer[] {
-  return keys.sort((a, b) => a.compare(b));
+  return [...keys].sort((a, b) => a.compare(b));
 }
 
 function multiArgs(threshold: number, keys: Buffer[]): [number, ...string[]] {
@@ -44,7 +44,12 @@ export class BabylonDescriptorBuilder {
     return {
       and_v: [
         {
-          and_v: [pk(this.stakerKey), { 'v:multi_a': multiArgs(1, this.finalityProviderKeys) }],
+          and_v: [
+            pk(this.stakerKey),
+            this.finalityProviderKeys.length === 1
+              ? { 'v:pk': this.finalityProviderKeys[0].toString('hex') }
+              : { 'v:multi_a': multiArgs(1, this.finalityProviderKeys) },
+          ],
         },
         { multi_a: multiArgs(this.covenantThreshold, this.covenantKeys) },
       ],