Folder restructure (#6304)

* Remove ui/app/keychains/

* Remove ui/app/img/ (unused images)

* Move conversion-util to helpers/utils/

* Move token-util to helpers/utils/

* Move /helpers/*.js inside /helpers/utils/

* Move util tests inside /helpers/utils/

* Renameand move confirm-transaction/util.js to helpers/utils/

* Move higher-order-components to helpers/higher-order-components/

* Move infura-conversion.json to helpers/constants/

* Move all utility functions to helpers/utils/

* Move pages directory to top-level

* Move all constants to helpers/constants/

* Move metametrics inside helpers/

* Move app and root inside pages/

* Move routes inside helpers/

* Re-organize ducks/

* Move reducers to ducks/

* Move selectors inside selectors/

* Move test out of test folder

* Move action, reducer, store inside store/

* Move ui components inside ui/

* Move UI components inside ui/

* Move connected components inside components/app/

* Move i18n-helper inside helpers/

* Fix unit tests

* Fix unit test

* Move pages components

* Rename routes component

* Move reducers to ducks/index

* Fix bad path in unit test

1 files changed, 65 insertions, 0 deletions

diff --git a/ui/app/helpers/higher-order-components/with-method-data/with-method-data.component.js b/ui/app/helpers/higher-order-components/with-method-data/with-method-data.component.js
new file mode 100644
index 000000000..efa9ad0a2
--- /dev/null
+++ b/ui/app/helpers/higher-order-components/with-method-data/with-method-data.component.js
@@ -0,0 +1,65 @@
+import React, { PureComponent } from 'react'
+import PropTypes from 'prop-types'
+import { getMethodData, getFourBytePrefix } from '../../utils/transactions.util'
+
+export default function withMethodData (WrappedComponent) {
+  return class MethodDataWrappedComponent extends PureComponent {
+    static propTypes = {
+      transaction: PropTypes.object,
+      knownMethodData: PropTypes.object,
+      addKnownMethodData: PropTypes.func,
+    }
+
+    static defaultProps = {
+      transaction: {},
+      knownMethodData: {},
+    }
+
+    state = {
+      methodData: {},
+      done: false,
+      error: null,
+    }
+
+    componentDidMount () {
+      this.fetchMethodData()
+    }
+
+    async fetchMethodData () {
+      const { transaction, knownMethodData, addKnownMethodData } = this.props
+      const { txParams: { data = '' } = {} } = transaction
+
+      if (data) {
+        try {
+          let methodData
+          const fourBytePrefix = getFourBytePrefix(data)
+          if (fourBytePrefix in knownMethodData) {
+            methodData = knownMethodData[fourBytePrefix]
+          } else {
+            methodData = await getMethodData(data)
+            if (!Object.entries(methodData).length === 0) {
+              addKnownMethodData(fourBytePrefix, methodData)
+            }
+          }
+
+          this.setState({ methodData, done: true })
+        } catch (error) {
+          this.setState({ done: true, error })
+        }
+      } else {
+        this.setState({ done: true })
+      }
+    }
+
+    render () {
+      const { methodData, done, error } = this.state
+
+      return (
+        <WrappedComponent
+          { ...this.props }
+          methodData={{ data: methodData, done, error }}
+        />
+      )
+    }
+  }
+}