Contracts

Plumb's on-chain surface runs on Base Sepolia (chainId 84532) during the public preview. All contracts are verified on Blockscout.

Addresses

The current rotated gateway signer (used by Settlement and PipeOracle) is 0xEB8BB06Ab3588ad6CF7Ba9B016dBF974Cfe3524e. Rotation is handled by the owner via setSigner() and published to SDK + explorer so downstream verifiers can validate post-rotation receipts.

ABIs

ABIs are pinned in the @plumb/contracts workspace as TypeScript consts:

import {
  PLMB_ABI,
  SETTLEMENT_ABI,
  HUB_REGISTRY_ABI,
  PIPE_ORACLE_ABI,
  PIPE_CONSUMER_ABI,
} from '@plumb/contracts/abis';

deploymentForChain(84532) returns the same table as above.

Typical flows

Settlement.deposit(amount)

Top up credit. Transfers amount PLMB from the caller; indexer picks up the Deposited event and credits the ledger.

Settlement.checkpointReceipts(root, batch)

Operator-only. Batcher rolls up settled receipts into a Merkle root nightly.

HubRegistry.register(modelHash, uploader)

Admin-only during preview. Pins a (hash, uploader) tuple so future revenue can be routed to the uploader.

PipeOracle.request(modelHash, inputHash, callback)

Any contract can request inference. Returns a jobId; the worker emits JobFulfilled(jobId, result, sig) and calls IPipeCallback(callback).pipeCallback(jobId, result).

See /product/verification for a minimal consumer contract example.

Events

Settlement:
  Deposited(address indexed addr, uint256 amountMicro, uint256 txBlock)
  Checkpointed(bytes32 indexed root, uint64 receiptCount, uint64 totalCostMicro)
  SignerRotated(address indexed from, address indexed to)

HubRegistry:
  ModelRegistered(bytes32 indexed modelHash, address indexed uploader)

PipeOracle:
  JobRequested(uint256 indexed jobId, address indexed caller, bytes32 modelHash, bytes32 inputHash)
  JobFulfilled(uint256 indexed jobId, bytes32 resultHash)