Add token selection to the send screen (#6445)

* Move send to pages/

* Fix unit tests

* Finish UI

* Integrate asset dropdown to send actions

* Remove console.log

* Hide asset change during edit

* Enable switch from send token to seand eth

* Enable switching from token to eth when editing

* Fix linter

* Fixing test

* Fix unit tests

* Fix linter

* Fix react warning; remove console.log

* fix flat test

* Add metrics

* Address code review comments

* Consistent spacing between send screen form rows.

* Reduce height of gas buttons on send screen.

* Make send screen gas button height dependent on size of contents.

1 files changed, 61 insertions, 0 deletions

diff --git a/ui/app/pages/send/send.constants.js b/ui/app/pages/send/send.constants.js
new file mode 100644
index 000000000..d3fa38d10
--- /dev/null
+++ b/ui/app/pages/send/send.constants.js
@@ -0,0 +1,61 @@
+const ethUtil = require('ethereumjs-util')
+const { conversionUtil, multiplyCurrencies } = require('../../helpers/utils/conversion-util')
+
+const MIN_GAS_PRICE_DEC = '0'
+const MIN_GAS_PRICE_HEX = (parseInt(MIN_GAS_PRICE_DEC)).toString(16)
+const MIN_GAS_LIMIT_DEC = '21000'
+const MIN_GAS_LIMIT_HEX = (parseInt(MIN_GAS_LIMIT_DEC)).toString(16)
+
+const MIN_GAS_PRICE_GWEI = ethUtil.addHexPrefix(conversionUtil(MIN_GAS_PRICE_HEX, {
+  fromDenomination: 'WEI',
+  toDenomination: 'GWEI',
+  fromNumericBase: 'hex',
+  toNumericBase: 'hex',
+  numberOfDecimals: 1,
+}))
+
+const MIN_GAS_TOTAL = multiplyCurrencies(MIN_GAS_LIMIT_HEX, MIN_GAS_PRICE_HEX, {
+  toNumericBase: 'hex',
+  multiplicandBase: 16,
+  multiplierBase: 16,
+})
+
+const TOKEN_TRANSFER_FUNCTION_SIGNATURE = '0xa9059cbb'
+
+const INSUFFICIENT_FUNDS_ERROR = 'insufficientFunds'
+const INSUFFICIENT_TOKENS_ERROR = 'insufficientTokens'
+const NEGATIVE_ETH_ERROR = 'negativeETH'
+const INVALID_RECIPIENT_ADDRESS_ERROR = 'invalidAddressRecipient'
+const INVALID_RECIPIENT_ADDRESS_NOT_ETH_NETWORK_ERROR = 'invalidAddressRecipientNotEthNetwork'
+const REQUIRED_ERROR = 'required'
+const KNOWN_RECIPIENT_ADDRESS_ERROR = 'knownAddressRecipient'
+
+const ONE_GWEI_IN_WEI_HEX = ethUtil.addHexPrefix(conversionUtil('0x1', {
+  fromDenomination: 'GWEI',
+  toDenomination: 'WEI',
+  fromNumericBase: 'hex',
+  toNumericBase: 'hex',
+}))
+
+const SIMPLE_GAS_COST = '0x5208' // Hex for 21000, cost of a simple send.
+const BASE_TOKEN_GAS_COST = '0x186a0' // Hex for 100000, a base estimate for token transfers.
+
+module.exports = {
+  INSUFFICIENT_FUNDS_ERROR,
+  INSUFFICIENT_TOKENS_ERROR,
+  INVALID_RECIPIENT_ADDRESS_ERROR,
+  KNOWN_RECIPIENT_ADDRESS_ERROR,
+  INVALID_RECIPIENT_ADDRESS_NOT_ETH_NETWORK_ERROR,
+  MIN_GAS_LIMIT_DEC,
+  MIN_GAS_LIMIT_HEX,
+  MIN_GAS_PRICE_DEC,
+  MIN_GAS_PRICE_GWEI,
+  MIN_GAS_PRICE_HEX,
+  MIN_GAS_TOTAL,
+  NEGATIVE_ETH_ERROR,
+  ONE_GWEI_IN_WEI_HEX,
+  REQUIRED_ERROR,
+  SIMPLE_GAS_COST,
+  TOKEN_TRANSFER_FUNCTION_SIGNATURE,
+  BASE_TOKEN_GAS_COST,
+}