feat(statics): add USDC, PYUSD, WTGXX sepolia tokens

[abhijeet848]

What

Adds USDC, PYUSD, and WTGXX as ERC20 tokens on Sepolia (sepeth), plus their OFC equivalents.

Coin	OFC	Decimals	Contract
sepeth:usdc	ofcsepeth:usdc	6	0x1c7d4b196cb0c7b01d743fbc6116a902379c7238
sepeth:pyusd	ofcsepeth:pyusd	6	0xcac524bca292aaade2df8a05cc58f0a65b1b3bb9
sepeth:wtgxx	ofcsepeth:wtgxx	18	0x0b2517eef907389f36fd87add36e9118d364bd67

Notes

• Naming: bare symbols (sepeth:usdc), not t-prefixed — these are the real issuer-deployed contracts, following the same convention as tsol:usdc and tbaseeth:usdc.
• Added to testnetPrefixExceptions in the naming-convention test, same as every hteth: token — the check requires the full name to start with t, and sepeth starts with "s".
• WTGXX is a money market fund token, not a stablecoin, so no STABLECOIN feature — consistent with the mainnet wtgxx entry.
• WTGXX excludes Singapore custody to match the mainnet wtgxx entry. Affects custodial wallet creation only, not Go Accounts.

Ticket: SCAAS-11083

[linear-code]

SCAAS-11083

[Copilot]

Pull request overview

Adds USDC, PYUSD, and WTGXX Sepolia ERC-20 tokens with matching OFC definitions.

Changes:

• Registers token metadata, contracts, decimals, and features.
• Adds underlying asset values.
• Updates naming-convention exceptions.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated no comments.

File	Description
modules/statics/test/unit/tokenNamingConvention.ts	Allows Sepolia token naming exceptions.
modules/statics/src/coins/ofcErc20Coins.ts	Adds matching OFC tokens.
modules/statics/src/coins/erc20Coins.ts	Adds three Sepolia ERC-20 tokens.
modules/statics/src/base.ts	Defines new underlying assets.

---

💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.

[damodarnaik699]

1. I see this ticket is scoped for prod tokens only do the test tokens are already there ?, I not can you onboard them too at a same time so that you can spend some less time with the onboarding process

2. Can you check do the Asset Management in TAT ( Client Admin ) support the Sepolia network if do try it from there instead of manual pr's

My comments are not blockers

[abhijeet848]

1. I see this ticket is scoped for prod tokens only do the test tokens are already there ?, I not can you onboard them too at a same time so that you can spend some less time with the onboarding process
2. Can you check do the Asset Management in TAT ( Client Admin ) support the Sepolia network if do try it from there instead of manual pr's

My comments are not blockers

1. these are testnet tokens, prod tokens are already onboarded
2. Asset Management in TAT does not support sepeth yet

[damodarnaik699]

these are testnet tokens, prod tokens are already onboarded

Sorry My bad didn't saw it

[yashvanthbl137-crypto]

LGTM