Forward eth_sendTransaction to the sequencer

[deffrian]

Fixes Closes Resolves #
In optimism we don't have local tx pool, so we need to forward all txs to the sequencer

Changes

• Forward
• StepDependencyException.ThrowIfNull

Types of changes

What types of changes does your code introduce?

• Bugfix (a non-breaking change that fixes an issue)
• New feature (a non-breaking change that adds functionality)
• Breaking change (a change that causes existing functionality not to work as expected)
• Optimization
• Refactoring
• Documentation update
• Build-related changes
• Other: Description

Testing

Requires testing

• Yes
• No

If yes, did you write tests?

• Yes
• No

Documentation

Requires documentation update

• Yes
• No

Requires explanation in Release Notes

• Yes
• No