fixup! Break out piratechain into its own implementation

src/piratechain/PiratechainEngine.ts

@@ -262,6 +262,7 @@ export class PiratechainEngine extends CurrencyEngine<
       blockHeight: tx.minedHeight,
       nativeAmount: netNativeAmount,
       isSend: netNativeAmount.startsWith('-'),
+      memos: [],
       networkFee: this.networkInfo.defaultNetworkFee,
       ourReceiveAddresses, // blank if you sent money otherwise array of addresses that are yours in this transaction
       signedTx: '',
@@ -303,6 +304,7 @@ export class PiratechainEngine extends CurrencyEngine<
   async makeSpend(edgeSpendInfoIn: EdgeSpendInfo): Promise<EdgeTransaction> {
     if (!this.isSynced()) throw new Error('Cannot spend until wallet is synced')
     const { edgeSpendInfo, currencyCode } = this.makeSpendCheck(edgeSpendInfoIn)
+    const { memos = [] } = edgeSpendInfo
     const spendTarget = edgeSpendInfo.spendTargets[0]
     const { publicAddress, nativeAmount } = spendTarget
 
@@ -346,6 +348,7 @@ export class PiratechainEngine extends CurrencyEngine<
       blockHeight: 0, // blockHeight
       nativeAmount: `-${totalTxAmount}`, // nativeAmount
       isSend: nativeAmount.startsWith('-'),
+      memos,
       networkFee: this.networkInfo.defaultNetworkFee, // networkFee
       ourReceiveAddresses: [], // ourReceiveAddresses
       signedTx: '', // signedTx
@@ -365,6 +368,7 @@ export class PiratechainEngine extends CurrencyEngine<
     edgeTransaction: EdgeTransaction,
     opts?: EdgeEnginePrivateKeyOptions
   ): Promise<EdgeTransaction> {
+    const { memos } = edgeTransaction
     const piratechainPrivateKeys = asPiratechainPrivateKeys(this.pluginId)(
       opts?.privateKeys
     )
@@ -374,14 +378,15 @@ export class PiratechainEngine extends CurrencyEngine<
     )
       throw new Error('Invalid spend targets')
 
+    const memo = memos[0]?.type === 'text' ? memos[0].value : ''
     const spendTarget = edgeTransaction.spendTargets[0]
     const txParams: PiratechainSpendInfo = {
       zatoshi: sub(
         abs(edgeTransaction.nativeAmount),
         edgeTransaction.networkFee
       ),
       toAddress: spendTarget.publicAddress,
-      memo: spendTarget.memo ?? spendTarget.uniqueIdentifier ?? '',
+      memo,
       fromAccountIndex: 0,
       spendingKey: piratechainPrivateKeys.spendKey
     }