Add deprecation message for eth_signTypedData

1 files changed, 5 insertions, 0 deletions

diff --git a/app/scripts/lib/inpage-provider.js b/app/scripts/lib/inpage-provider.js
index 4e65f0a23..6ef511453 100644
--- a/app/scripts/lib/inpage-provider.js
+++ b/app/scripts/lib/inpage-provider.js
@@ -54,6 +54,11 @@ function MetamaskInpageProvider (connectionStream) {
 // also remap ids inbound and outbound
 MetamaskInpageProvider.prototype.sendAsync = function (payload, cb) {
   const self = this
+
+  if (payload.method === 'eth_signTypedData') {
+    console.warn('MetaMask: This experimental version of eth_signTypedData will be deprecated in the next release in favor of the standard as defined in EIP-712. See https://git.io/fNzPl for more information on the new standard.')
+  }
+
   self.rpcEngine.handle(payload, cb)
 }