Allow transactions with 0-gwei gas price (#4073)

* Allow transactions with 0-gwei gas price
* Add tests to verify tx with 0 gas fee
* Conditionally use CurrencyInput in CurrencyDisplay

1 files changed, 2 insertions, 2 deletions

diff --git a/ui/app/components/send/send-constants.js b/ui/app/components/send/send-constants.js
index b3ee0899a..5d89c74aa 100644
--- a/ui/app/components/send/send-constants.js
+++ b/ui/app/components/send/send-constants.js
@@ -1,8 +1,8 @@
 const ethUtil = require('ethereumjs-util')
 const { conversionUtil, multiplyCurrencies } = require('../../conversion-util')
 
-const MIN_GAS_PRICE_HEX = (100000000).toString(16)
-const MIN_GAS_PRICE_DEC = '100000000'
+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)