Relayer spamming ethereum rpc

[Voxelot]

There are some conditions in the relayer that appear to be causing an apparent infinite loop of requests to the ethereum rpc.

As seen here in our test environment, the relayer went on the fritz and made a lot of requests to eth rpc without any delay between them:

The culprit is likely these two sections:

While the second image indicates that the relayer should wait before running again, this delay only takes effect if synced is set to some value. If the connection to eth drops or is rate limited, and the relayer is unable to obtain any sync state from eth, then it appears to start busily polling the connection to eth.