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Move

• Alt-Left move cursor to previous start of word from cursor
• Alt-Right move cursor to next end of word from cursor
• Fn-Left move cursor to line start
• Fn-Right move cursor to line end

Delete

• Ctrl-W / Alt-Del delete to last word bound from cursor
• Ctrl-U delete to start from cursor

For multi-line snippets

• Ctrl+D finish editing
• Ctrl+C exit editor mode
• support all the editing shortcuts of the normal mode
• allow moving cursor across lines

On each invocation, the repl replays the current session on each input, the statements of which are currently encased in a single function. When applicable, each input is set as the return of the function. And we rely on the response of calling the function (initiated using ether.js) to display the result of each input.

From what we've seen so far, the actual response is affected by the function signature. The return of the function won't be available unless the function is declared as pure or view. This is all fine when the session only contains "pure" statements. The problem occurs when we start to mix in what Solidity referred to as state-mutating statements, since declaring a function as pure or view is forbidden if any of the contained statements may modify the state.

This has become a common feature for REPLs: listen to the input changes and preview the result of the input so far. This could greatly improve UX. Will try it out and see if we could make the preview quick and responsive.

Similar to node <path>.