Autofill gasPrice for retry attempts with either the recommended gasp…

…rice or a %10 bump (#5786)

* transactions - autofill gasPrice for retry attempts with either the recomened gasprice or a %10 bump

* lint

app/scripts/controllers/transactions/index.js

@@ -229,7 +229,16 @@ class TransactionController extends EventEmitter {
 
   async retryTransaction (originalTxId) {
     const originalTxMeta = this.txStateManager.getTx(originalTxId)
+    const { txParams } = originalTxMeta
     const lastGasPrice = originalTxMeta.txParams.gasPrice
+    const suggestedGasPriceBN = new ethUtil.BN(ethUtil.stripHexPrefix(this.getGasPrice()), 16)
+    const lastGasPriceBN = new ethUtil.BN(ethUtil.stripHexPrefix(lastGasPrice), 16)
+    // essentially lastGasPrice * 1.1 but
+    // dont trust decimals so a round about way of doing that
+    const lastGasPriceBNBumped = lastGasPriceBN.mul(new ethUtil.BN(110, 10)).div(new ethUtil.BN(100, 10))
+    // transactions that are being retried require a >=%10 bump or the clients will throw an error
+    txParams.gasPrice = suggestedGasPriceBN.gt(lastGasPriceBNBumped) ? `0x${suggestedGasPriceBN.toString(16)}` : `0x${lastGasPriceBNBumped.toString(16)}`
+
     const txMeta = this.txStateManager.generateTxMeta({
       txParams: originalTxMeta.txParams,
       lastGasPrice,

test/unit/app/controllers/transactions/tx-controller-test.js

@@ -28,6 +28,7 @@ describe('Transaction Controller', function () {
     blockTrackerStub.getLatestBlock = noop
     txController = new TransactionController({
       provider,
+      getGasPrice: function () { return '0xee6b2800' },
       networkStore: new ObservableStore(currentNetworkId),
       txHistoryLimit: 10,
       blockTracker: blockTrackerStub,
@@ -415,8 +416,9 @@ describe('Transaction Controller', function () {
   })
 
   describe('#retryTransaction', function () {
-    it('should create a new txMeta with the same txParams as the original one', function (done) {
+    it('should create a new txMeta with the same txParams as the original one but with a higher gasPrice', function (done) {
       const txParams = {
+        gasPrice: '0xee6b2800',
         nonce: '0x00',
         from: '0xB09d8505E1F4EF1CeA089D47094f5DD3464083d4',
         to: '0xB09d8505E1F4EF1CeA089D47094f5DD3464083d4',
@@ -427,6 +429,7 @@ describe('Transaction Controller', function () {
       ])
       txController.retryTransaction(1)
       .then((txMeta) => {
+        assert.equal(txMeta.txParams.gasPrice, '0x10642ac00', 'gasPrice should have a %10 gasPrice bump')
         assert.equal(txMeta.txParams.nonce, txParams.nonce, 'nonce should be the same')
         assert.equal(txMeta.txParams.from, txParams.from, 'from should be the same')
         assert.equal(txMeta.txParams.to, txParams.to, 'to should be the same')