Emit unencrypted events more efficiently

[benesjan]

Currently when we emit an unencrypted event we receive each string char encoded in 1 field. This seems wasteful and should probably be addressed.

Example of ACVM fields received for "Balance set in constructor" event message:

    args  [
      '0x0000000000000000000000000000000000000000000000000000000000000042',
      '0x0000000000000000000000000000000000000000000000000000000000000061',
      '0x000000000000000000000000000000000000000000000000000000000000006c',
      '0x0000000000000000000000000000000000000000000000000000000000000061',
      '0x000000000000000000000000000000000000000000000000000000000000006e',
      '0x0000000000000000000000000000000000000000000000000000000000000063',
      '0x0000000000000000000000000000000000000000000000000000000000000065',
      '0x0000000000000000000000000000000000000000000000000000000000000020',
      '0x0000000000000000000000000000000000000000000000000000000000000073',
      '0x0000000000000000000000000000000000000000000000000000000000000065',
      '0x0000000000000000000000000000000000000000000000000000000000000074',
      '0x0000000000000000000000000000000000000000000000000000000000000020',
      '0x0000000000000000000000000000000000000000000000000000000000000069',
      '0x000000000000000000000000000000000000000000000000000000000000006e',
      '0x0000000000000000000000000000000000000000000000000000000000000020',
      '0x0000000000000000000000000000000000000000000000000000000000000063',
      '0x000000000000000000000000000000000000000000000000000000000000006f',
      '0x000000000000000000000000000000000000000000000000000000000000006e',
      '0x0000000000000000000000000000000000000000000000000000000000000073',
      '0x0000000000000000000000000000000000000000000000000000000000000074',
      '0x0000000000000000000000000000000000000000000000000000000000000072',
      '0x0000000000000000000000000000000000000000000000000000000000000075',
      '0x0000000000000000000000000000000000000000000000000000000000000063',
      '0x0000000000000000000000000000000000000000000000000000000000000074',
      '0x000000000000000000000000000000000000000000000000000000000000006f',
      '0x0000000000000000000000000000000000000000000000000000000000000072'
    ]

[iAmMichaelConnor]

we'll work on emitting the logs without oracles. Once we'll be working on that we'll totally refactor how the logs are handled and all the current code using oracles will be thrown away.

@benesjan how will logs be emitted without using an oracle?

E.g. if a function wants to emit a large log, it can only push the log_hash to the public inputs, so how is the 'preimage' of the log_hash retained without passing it to an oracle?

[benesjan]

E.g. if a function wants to emit a large log, it can only push the log_hash to the public inputs, so how is the 'preimage' of the log_hash retained without passing it to an oracle?

@iAmMichaelConnor You are right, I was saying nonsense. Updated the issue to not confuse more people.