Derive gas price estimate from previous transactions

Return the 50th percentile lowest gas price of the previous 20 blocks.

2 files changed, 3 insertions, 1 deletions

diff --git a/app/scripts/controllers/blacklist.js b/app/scripts/controllers/blacklist.js
index dd671943f..33c31dab9 100644
--- a/app/scripts/controllers/blacklist.js
+++ b/app/scripts/controllers/blacklist.js
@@ -57,3 +57,4 @@ class BlacklistController {
 }
 
 module.exports = BlacklistController
+
diff --git a/app/scripts/controllers/transactions.js b/app/scripts/controllers/transactions.js
index 7c7efb84d..be7e7221f 100644
--- a/app/scripts/controllers/transactions.js
+++ b/app/scripts/controllers/transactions.js
@@ -32,6 +32,7 @@ module.exports = class TransactionController extends EventEmitter {
     this.provider = opts.provider
     this.blockTracker = opts.blockTracker
     this.signEthTx = opts.signTransaction
+    this.getGasPrice = opts.getGasPrice
 
     this.memStore = new ObservableStore({})
     this.query = new EthQuery(this.provider)
@@ -179,7 +180,7 @@ module.exports = class TransactionController extends EventEmitter {
     // ensure value
     txMeta.gasPriceSpecified = Boolean(txParams.gasPrice)
     txMeta.nonceSpecified = Boolean(txParams.nonce)
-    const gasPrice = txParams.gasPrice || await this.query.gasPrice()
+    const gasPrice = txParams.gasPrice || this.getGasPrice()
     txParams.gasPrice = ethUtil.addHexPrefix(gasPrice.toString(16))
     txParams.value = txParams.value || '0x0'
     // set gasLimit