Submit drand numbers

[GabrielMartinezRodriguez]

Linked Issues

• closes https://linear.app/happychain/issue/HAPPY-244/submit-drand-to-the-dranoracle-smartcontract

Description

This PR adds the code to submit DRAND numbers to the blockchain every 3 seconds.

In addition, it adapts the code to ensure commitments continue to work, considering the commitment contract now operates based on blocks instead of timestamps.

• Include all relevant context (but no need to repeat the issue's content).
• Draw attention to new, noteworthy & unintuitive elements.

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Checklist

Basics

• B1. I have applied the proper label & proper branch name (e.g. norswap/build-system-caching).
• B2. This PR is not so big that it should be split & addresses only one concern.
• B3. The PR targets the lowest branch it can (ideally master).

Reminder: PR review guidelines

Correctness

• C1. Builds and passes tests.
• C2. The code is properly parameterized & compatible with different environments (e.g. local,
  testnet, mainnet, standalone wallet, ...).
• C3. I have manually tested my changes & connected features.

< INDICATE BROWSER, DEMO APP & OTHER ENV DETAILS USED FOR TESTING HERE >

< INDICATE TESTED SCENARIOS (USER INTERFACE INTERACTION, CODE FLOWS) HERE >

Tested in local with anvil

• C4. I have performed a thorough self-review of my code after submitting the PR,
  and have updated the code & comments accordingly.

Architecture & Documentation

• D1. I made it easy to reason locally about the code, by (1) using proper abstraction boundaries,
  (2) commenting these boundaries correctly, (3) adding inline comments for context when needed.
• D2. All public-facing APIs & meaningful (non-local) internal APIs are properly documented in code
  comments.
• D3. If appropriate, the general architecture of the code is documented in a code comment or
  in a Markdown document.

[cloudflare-workers-and-pages]

Deploying happychain with    Cloudflare Pages

Latest commit:	c0de6bf
Status:	✅  Deploy successful!
Preview URL:	https://599daeca.happychain.pages.dev
Branch Preview URL:	https://gabriel-drand-service.happychain.pages.dev

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[GabrielMartinezRodriguez]

• Deploy randomness service #416 : 2 dependent PRs (#434 , #441 )
• Add config contract #404
• Randomness service: Improve performance and reliability #372
• Add transaction submission failure hook and error handling #366
• Increase default RPC timeout to 2000ms #365
• Add configurable HTTP polling interval for block monitoring #362
• Force initialization before using the TXM #361
• Script to monitor randomness service #325
• Script to easily launch the randomness service locally #324
• Submit drand numbers #318 👈 (View in Graphite)
• Random oracle contracts #307
• Only prune finalized randomness entries #305
• Add NewBlock hook #304
• Refactors the randomness service to be able to process pending commitments  #303
• Add SQLite persistence to randomness service #300
• Txm no longer receives Viem objects #298 : 1 other dependent PR (#299 )
• Add flush mechanism #289 : 1 other dependent PR (#297 )
• Allow run multiple txm simultaneously within the same service #285
• Added docs for txm #272
• Mutex in tx monitor #264
• Purge transactions #232
• Txm hooks #229
• Use kysely instead of mikro-orm #250
• master

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[linear]

HAPPY-244 Submit Drand to the `DranOracle` smartcontract

Create a service that submits the random numbers generated by https://drand.love/ to the DranOracle smart contract

[norswap]

Probably worth to do a thorough randomness spec + code review at some point & documenting the design, but that's for later.