Ryan Mehta

Make signAndSendTransaction functionality public

2

Right now the `account.signAndSendTransaction` method is protected. The expectation being that a developer should use the `functionCall`, `createAndDeployContract`, `sendMoney`, etc methods. It would be nice to open up that functionality...

Indexer: AddKey won't accurately report nonce (Seen in NEAR explorer)

3

**Describe the bug** On testnet with (#4064) `action_add_key` now sets the access key nonce to `(block_height - 1) * 1_000_000`: [https://github.com/near/nearcore/blob/6da6f34b99a788508bab1d9cd4ce818449699ece/runtime/runtime/src/actions.rs#L624](https://github.com/near/nearcore/blob/6da6f34b99a788508bab1d9cd4ce818449699ece/runtime/runtime/src/actions.rs#L624) The indexer uses the action inside the original transaction...

add warning if follower is behind

2

add a warning to `pg:unfollow` if the follower is behind