1 files changed, 0 insertions, 103 deletions

diff --git a/app/scripts/lib/tx-gas-utils.js b/app/scripts/lib/tx-gas-utils.js
deleted file mode 100644
index c579e462a..000000000
--- a/app/scripts/lib/tx-gas-utils.js
+++ /dev/null
@@ -1,103 +0,0 @@
-const EthQuery = require('ethjs-query')
-const {
-  hexToBn,
-  BnMultiplyByFraction,
-  bnToHex,
-} = require('./util')
-const { addHexPrefix } = require('ethereumjs-util')
-const SIMPLE_GAS_COST = '0x5208' // Hex for 21000, cost of a simple send.
-
-/*
-tx-utils are utility methods for Transaction manager
-its passed ethquery
-and used to do things like calculate gas of a tx.
-*/
-
-module.exports = class TxGasUtil {
-
-  constructor (provider) {
-    this.query = new EthQuery(provider)
-  }
-
-  async analyzeGasUsage (txMeta) {
-    const block = await this.query.getBlockByNumber('latest', true)
-    let estimatedGasHex
-    try {
-      estimatedGasHex = await this.estimateTxGas(txMeta, block.gasLimit)
-    } catch (err) {
-      const simulationFailed = (
-        err.message.includes('Transaction execution error.') ||
-        err.message.includes('gas required exceeds allowance or always failing transaction')
-      )
-      if (simulationFailed) {
-        txMeta.simulationFails = true
-        return txMeta
-      }
-    }
-    this.setTxGas(txMeta, block.gasLimit, estimatedGasHex)
-    return txMeta
-  }
-
-  async estimateTxGas (txMeta, blockGasLimitHex) {
-    const txParams = txMeta.txParams
-
-    // check if gasLimit is already specified
-    txMeta.gasLimitSpecified = Boolean(txParams.gas)
-
-    // if it is, use that value
-    if (txMeta.gasLimitSpecified) {
-      return txParams.gas
-    }
-
-    // if recipient has no code, gas is 21k max:
-    const recipient = txParams.to
-    const hasRecipient = Boolean(recipient)
-    let code
-    if (recipient) code = await this.query.getCode(recipient)
-
-    if (hasRecipient && (!code || code === '0x')) {
-      txParams.gas = SIMPLE_GAS_COST
-      txMeta.simpleSend = true // Prevents buffer addition
-      return SIMPLE_GAS_COST
-    }
-
-    // if not, fall back to block gasLimit
-    const blockGasLimitBN = hexToBn(blockGasLimitHex)
-    const saferGasLimitBN = BnMultiplyByFraction(blockGasLimitBN, 19, 20)
-    txParams.gas = bnToHex(saferGasLimitBN)
-
-    // run tx
-    return await this.query.estimateGas(txParams)
-  }
-
-  setTxGas (txMeta, blockGasLimitHex, estimatedGasHex) {
-    txMeta.estimatedGas = addHexPrefix(estimatedGasHex)
-    const txParams = txMeta.txParams
-
-    // if gasLimit was specified and doesnt OOG,
-    // use original specified amount
-    if (txMeta.gasLimitSpecified || txMeta.simpleSend) {
-      txMeta.estimatedGas = txParams.gas
-      return
-    }
-    // if gasLimit not originally specified,
-    // try adding an additional gas buffer to our estimation for safety
-    const recommendedGasHex = this.addGasBuffer(txMeta.estimatedGas, blockGasLimitHex)
-    txParams.gas = recommendedGasHex
-    return
-  }
-
-  addGasBuffer (initialGasLimitHex, blockGasLimitHex) {
-    const initialGasLimitBn = hexToBn(initialGasLimitHex)
-    const blockGasLimitBn = hexToBn(blockGasLimitHex)
-    const upperGasLimitBn = blockGasLimitBn.muln(0.9)
-    const bufferedGasLimitBn = initialGasLimitBn.muln(1.5)
-
-    // if initialGasLimit is above blockGasLimit, dont modify it
-    if (initialGasLimitBn.gt(upperGasLimitBn)) return bnToHex(initialGasLimitBn)
-    // if bufferedGasLimit is below blockGasLimit, use bufferedGasLimit
-    if (bufferedGasLimitBn.lt(upperGasLimitBn)) return bnToHex(bufferedGasLimitBn)
-    // otherwise use blockGasLimit
-    return bnToHex(upperGasLimitBn)
-  }
-}
\ No newline at end of file