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Obsero

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Contracts

Every contract Obsero writes to or reads on Robinhood Chain (chain 4663), the job each one does, and the limits on what it is able to do. The source is open (MIT) and listed below.

ObseroWatchBoard Obsero

Deployed

0x9e193c0170f317885c1b6f06144ff9963b30122b

Public board of watch presets. publish(target, label, rules) stores the preset with the keccak-256 of its rule bytes and emits the bytes in PresetPublished, so anyone can import the rules and check them against the hash. retire(id) flags your own preset. Paged reads by target and by publisher. Gas: about 919k to deploy, 240k to publish, 36k to retire.

Permissions: Nobody holds special rights: there is no owner, admin role, fee, pause, upgrade path or constructor argument. Holds no funds: nothing is payable. Only a preset's publisher can retire it, and a retired preset stays readable. Publishing gives nobody any permission over the target address.

Explorer Source code

Chainlink ETH / USD External

Read only

0x78F3556b67E17Df817D51Ef5a990cDaF09E8d3A9

Price feed the site reads for the ETH / USD figure on the dashboard and the status page (latestRoundData).

Permissions: Operated by Chainlink, not by Obsero. Obsero only reads it.

Explorer

USDG External

Read only

0x5fc5360D0400a0Fd4f2af552ADD042D716F1d168

The Global Dollar stablecoin (6 decimals). The watchlist reads wallet balances from it and a starter preset watches its large transfers.

Permissions: Issued and controlled by its issuer, not by Obsero.

Explorer

WETH External

Read only

0x0Bd7D308f8E1639FAb988df18A8011f41EAcAD73

Wrapped ETH. The watchlist reads balances from it and a starter preset follows wraps and unwraps.

Permissions: Not operated by Obsero. Obsero only reads it.

Explorer

ArbSys Precompile

Chain built-in

0x0000000000000000000000000000000000000064

Robinhood Chain is Arbitrum-based, so block.number inside a contract reports the parent chain's block. ObseroWatchBoard asks the ArbSys precompile for the chain's own block number (with a gas cap and a fallback) and stores that on each preset.

Permissions: Part of the chain itself.

Source · MIT

Source and tests

Every line of the Obsero contract and its tests, as they are compiled. The public repository with the rest of the site is coming. Once deployed, a script in the repository checks that the address runs exactly this build.

Contracts

  • ObseroWatchBoard.solThe preset board: publish, retire, paged reads, ArbSys block lookup.ViewDownload

Tests

  • ObseroWatchBoard.t.solUnit and fuzz tests: limits, repeats, retiring, paging, ETH refusal, ArbSys paths.ViewDownload
  • ObseroWatchBoard.invariant.t.solInvariants: counts match a ghost model, every preset is consistent, the board never holds ETH.ViewDownload
  • ObseroFork.t.solFork test on Robinhood Chain mainnet against the real USDG contract.ViewDownload

Read path and contract health is tracked on the status page.