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| -rw-r--r-- | CHANGELOG.md | 2 | ||||
| -rw-r--r-- | app/scripts/inpage.js | 7 |
2 files changed, 9 insertions, 0 deletions
diff --git a/CHANGELOG.md b/CHANGELOG.md index ee9548606..968b8ab58 100644 --- a/CHANGELOG.md +++ b/CHANGELOG.md @@ -2,6 +2,8 @@ ## Current Master +- Detect when multiple web3 extensions are active, and provide useful error. + ## 3.12.0 2017-10-25 - Add support for alternative ENS TLDs (Ethereum Name Service Top-Level Domains). diff --git a/app/scripts/inpage.js b/app/scripts/inpage.js index b6889b00f..9261e7d64 100644 --- a/app/scripts/inpage.js +++ b/app/scripts/inpage.js @@ -31,6 +31,13 @@ var inpageProvider = new MetamaskInpageProvider(metamaskStream) // setup web3 // +if (typeof window.web3 !== 'undefined') { + throw new Error(`MetaMask detected another web3. + MetaMask will not work reliably with another web3 extension. + This usually happens if you have two MetaMasks installed, + or MetaMask and another web3 extension. Please remove one + and try again.`) +} var web3 = new Web3(inpageProvider) web3.setProvider = function () { log.debug('MetaMask - overrode web3.setProvider') |