**Purpose:** Drop-in content to open pull requests or submit listings for Defi Oracle Meta Mainnet (Chain ID 138). Use when you are ready to submit; forms are already submitted where applicable (see [REPOSITORIES_AND_PRS_CHAIN138](../../00-meta/REPOSITORIES_AND_PRS_CHAIN138.md)).
**Upstream status:** [ethereum-lists/chains#8124](https://github.com/ethereum-lists/chains/pull/8124) merged ([cb4c47b](https://github.com/ethereum-lists/chains/commit/cb4c47b0345fa8688dbc0133e0aa1cd3fb211a80)). This repo’s [eip155-138.json](./eip155-138.json) mirrors [upstream `master`](https://github.com/ethereum-lists/chains/blob/master/_data/chains/eip155-138.json) for local PRs and reviews.
1. Edit this file (and `pr-workspace/chains/_data/chains/eip155-138.json`) to match the intended upstream diff.
2. Fork https://github.com/ethereum-lists/chains, copy to `_data/chains/eip155-138.json`, run their checks / Prettier per [CONTRIBUTING.md](https://github.com/ethereum-lists/chains/blob/master/CONTRIBUTING.md).
3. In the PR description you can paste the “Chain 138 spec” from [ADD_CHAIN138_TO_TRUST_WALLET.md](../ADD_CHAIN138_TO_TRUST_WALLET.md#chain-138-spec-for-forms--pr-description).
When Ledger confirms the request, use [ADD_CHAIN138_TO_LEDGER_LIVE.md](../ADD_CHAIN138_TO_LEDGER_LIVE.md) and push materials to **bis-innovations/LedgerLive** for their review. No PR-ready file here; follow Ledger’s instructions.
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## 4. CoinGecko / CMC
No GitHub PR. Use [CMC_COINGECKO_SUBMISSION_RUNBOOK.md](../coingecko/CMC_COINGECKO_SUBMISSION_RUNBOOK.md) and export from the report API, then submit via platform forms.