[#339] Update frontend + SDK constants for Base mainnet

[realproject7]

Summary

• Set mainnet StoryFactory address 0x66087c0032c304Eb724544ef8Fc7C7f3E6C8CdF5 in lib/contracts/constants.ts
• Set mainnet PLOT_TOKEN to PL_TEST (0xF8A2C39111FCEB9C950aAf28A9E34EBaD99b85C1)
• Update RESERVE_LABEL from "$PLOT" to "PL_TEST" for test phase
• Add STORY_FACTORY_MAINNET_ADDRESS, MCV2_BOND_MAINNET_ADDRESS, DEPLOYMENT_BLOCK_MAINNET (43,559,145) to SDK
• Update .env.example with mainnet addresses and comments

Test plan

• npm run typecheck passes
• npm run build succeeds
• Constants switch correctly between testnet/mainnet based on NEXT_PUBLIC_CHAIN_ID

Fixes #339

🤖 Generated with Claude Code

[project7-interns]

Verdict: REQUEST CHANGES

Summary

The frontend constants look aligned with the deployed mainnet values, but the SDK side is still incomplete. The new mainnet constants are added, yet the PlotLink client continues to use Sepolia defaults even when configured for Base mainnet.

Findings

• [high] The SDK client never switches to the new mainnet contract addresses or mainnet deployment block for chainId=8453.
  • File: packages/sdk/src/client.ts
  • Suggestion: when chainId === 8453, default storyFactory, mcv2Bond, and fromBlock to the mainnet constants instead of STORY_FACTORY_ADDRESS, MCV2_BOND_ADDRESS, and DEPLOYMENT_BLOCK (which still point to Sepolia / block 20_000_000). As written, a mainnet SDK client will query and transact against the wrong defaults.
• [medium] The PR adds DEPLOYMENT_BLOCK_MAINNET, but the code paths that fetch logs still use DEPLOYMENT_BLOCK only.
  • File: packages/sdk/src/client.ts
  • Suggestion: select the deployment block by chain so mainnet log queries start from the actual deploy block 43_559_145.

Decision

Request changes because the ticket claims to update frontend + SDK constants for Base mainnet, but the SDK runtime still defaults to Sepolia values on mainnet.

[project7-interns]

T2b APPROVE

• Addresses verified: StoryFactory 0x66087c..., MCV2_Bond 0xc5a076..., PL_TEST 0xF8A2C3... — all match deployed contracts from PR #24
• Frontend constants: IS_TESTNET ternary correctly selects mainnet addresses; RESERVE_LABEL → "PL_TEST" for test phase ✓
• SDK constants: Separate *_MAINNET_* exports with deployment block 43,559,145 ✓
• .env.example: Documents both testnet/mainnet addresses ✓
• CI green (lint-and-typecheck passes)

LGTM.

[project7-interns]

Verdict: APPROVE

Summary

The follow-up commit fixes the SDK regression by selecting contract addresses and deployment block based on chainId. That closes the mainnet-defaulting gap while keeping the frontend constants aligned with the deployed contract.

Findings

• [info] packages/sdk/src/client.ts now switches StoryFactory, MCV2_Bond, and log fromBlock to the mainnet constants when chainId=8453.

Decision

Approve because the PR now updates both frontend and SDK runtime behavior for Base mainnet as required by issue #339.