feat: Add USDT and USDC for TRON

[rodrigopavezi]

Closes RequestNetwork/private-issues#224

Summary by CodeRabbit

• New Features
  • Added support for USDT (Tether USD) and USDC (USD Coin) on the Tron network.
• Schema / Types
  • Introduced Tron network and TRC20 token type to token definitions.
• Bug Fixes / Validation
  • Added Tron-specific address validation to ensure Tron addresses are correctly recognized.

[coderabbitai]

Walkthrough

Version bump from 4 to 5 and addition of two TRC20 Tron tokens (USDT-tron, USDC-tron); schema, types, and validation updated to recognize the Tron network and TRC20 token type.

Changes

Cohort / File(s)	Summary
Token List Configuration tokens/token-list.json	Version increment to 5 and append two TRC20 tokens on the Tron network: USDT-tron (Tether USD) and USDC-tron (USD Coin), decimals 6, chainId 728126428.
JSON Schema src/schemas/token-list-schema.json	Added "tron" to network enum and "TRC20" to token type enum values.
Type Definitions src/types/index.ts	Added TRC20 to TokenType enum, TRON = "tron" to NetworkType enum, and tron: 728126428 to CHAIN_IDS.
Validation Logic src/validation/validate.ts	Introduced TRON-specific address validation branch (Base58-style regex) for tokens with network === "tron", preserving existing validation for other networks.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~20 minutes

🚥 Pre-merge checks | ✅ 2 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (2 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The pull request title accurately summarizes the main change: adding USDT and USDC tokens for the TRON network, which is the primary focus of all modifications across the codebase.

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✨ Finishing touches

• 📝 Generate docstrings

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch feat/usdt-usdc-tron-support

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[greptile-apps]

Greptile Overview

Greptile Summary

This PR appends two TRON stablecoin entries (USDT and USDC) to tokens/token-list.json.

However, the repository’s current token-list schema and CI validation logic appear to only support EVM-style networks/tokens (plus ISO4217 fiat). The new tokens introduce network: "tron", type: "TRC20", TRON base58 addresses, and a TRON chainId that are not recognized by src/schemas/token-list-schema.json, src/types/index.ts, or src/validation/validate.ts, so the PR should fail validation checks until TRON/TRC20 is formally added to the supported schema/types/validation rules.

Confidence Score: 2/5

• Not safe to merge as-is because CI validation should fail on the newly added TRON tokens.
• The added tokens use network: tron / type: TRC20 and TRON base58 addresses, but the JSON schema and validation/types logic only recognize specific EVM networks and token types and validate addresses with ethers.isAddress(). This makes the failure deterministic unless the schema/types/validator are updated in the same PR.
• tokens/token-list.json (and the TRON support additions that would be required in src/schemas/token-list-schema.json, src/types/index.ts, and src/validation/validate.ts if TRON is intended)

Important Files Changed

Filename	Overview
tokens/token-list.json	Adds USDT/USDC entries for TRON, but current schema/types/validation only support EVM + ISO4217; new tokens use network="tron", type="TRC20", TRON base58 addresses, and an unknown chainId, so CI validation will fail.

Sequence Diagram

sequenceDiagram
  participant Dev as Contributor
  participant TokenList as tokens/token-list.json
  participant CI as GitHub Actions (pr.yml)
  participant Validator as src/validation/validate.ts
  participant Schema as src/schemas/token-list-schema.json
  participant Types as src/types/index.ts

  Dev->>TokenList: Add USDT-tron + USDC-tron entries
  CI->>Validator: Run npm run validate
  Validator->>Schema: AJV compile + validate(tokenList)
  Schema-->>Validator: Reject (network/type enums)
  Validator-->>CI: Exit 1 (schema errors)
  CI-->>Dev: Checks fail

  note over Validator,Types: Even if schema updated,
  Validator->>Types: isValidNetwork / isValidTokenType / CHAIN_IDS lookup
  Types-->>Validator: No tron/TRC20/chainId mapping
  Validator->>Validator: ethers.isAddress(TRON base58)
  Validator-->>CI: Exit 1 (token validation)

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[greptile-apps]

_{1 file reviewed, 1 comment}

_{Edit Code Review Agent Settings | Greptile}

[MantisClone]

LGTM. Token addresses, chain ID (728126428), and decimals verified against official sources.