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, 1 insertions, 2 deletions

diff --git a/old-ui/app/components/pending-tx.js b/old-ui/app/components/pending-tx.js
index cd4189fc4..c8132539c 100644
--- a/old-ui/app/components/pending-tx.js
+++ b/old-ui/app/components/pending-tx.js
@@ -16,8 +16,7 @@ const addressSummary = util.addressSummary
 const nameForAddress = require('../../lib/contract-namer')
 const BNInput = require('./bn-as-decimal-input')
 
-// corresponds with 0.1 GWEI
-const MIN_GAS_PRICE_BN = new BN('100000000')
+const MIN_GAS_PRICE_BN = new BN('0')
 const MIN_GAS_LIMIT_BN = new BN('21000')
 
 module.exports = PendingTx