Send raw transactions to etherscan API as the last resort

[sync-by-unito[bot]]

Send transactions to etherscan API if geth fails multiple times, as explained here:

https://skalelabs.atlassian.net/browse/SKALE-4149

┆Issue is synchronized with this Jira Bug

[sync-by-unito[bot]]

➤ Stan Kladko commented:

Blocks schain creation

[sync-by-unito[bot]]

➤ Ganna Kulikova commented:

To discuss with Stan Kladko

[sync-by-unito[bot]]

➤ Ivan Popovych commented:

It looks like API key is required to use Etherscan API:

To use the API service please create a FREE Api-Key Token from within the ClientPortal->MyApiKey area which you can then use with all your api requests.

https://goto.etherscan.com/apis ( https://goto.etherscan.com/apis ) So we need to ask validator to generate it by themselves. Or make general key for everyone.