feat: add TON blockchain support

[NeOMakinG]

Summary

Adds TON (The Open Network) blockchain as a second-class citizen in ShapeShift Web.

Changes

Chain Adapter (packages/chain-adapters/src/ton/)

• TonChainAdapter.ts - Full chain adapter implementation
  • Address derivation from public key (WalletV4R2 StateInit)
  • Account balance fetching via TON Center API
  • Transaction building with proper BoC encoding
  • Transaction signing via hdwallet
  • Transaction broadcasting
  • Fee estimation
  • Transaction status polling
• types.ts - TON-specific types (Account, BuildTxInput, FeeData, TonSignTx)

CAIP Constants (packages/caip/src/constants.ts)

• Added tonAssetId, tonChainId
• Added CHAIN_NAMESPACE.Ton, CHAIN_REFERENCE.TonMainnet
• Added ASSET_REFERENCE.Ton

CoinGecko Integration (packages/caip/src/adapters/coingecko/)

• Added Ton = 'the-open-network' to CoingeckoAssetPlatform enum
• Added TON mappings in chainIdToCoingeckoAssetPlatform and coingeckoAssetPlatformToChainId

Plugin (src/plugins/ton/)

• TON plugin with Ton feature flag
• Chain adapter registration with VITE_TON_NODE_URL

Config & Feature Flags

• Added VITE_TON_NODE_URL environment variable
• Added VITE_FEATURE_TON feature flag
• Added Ton to FeatureFlags type and initial state

Asset Generation (scripts/generateAssetData/ton/)

• TON asset generation script using CoinGecko

Utility Functions

• chainIdToFeeAssetId.ts - Added TON case
• getChainShortName.ts - Added TON case (returns 'TON')
• getBaseAsset.ts - Added TON case
• baseAssets.ts - Added TON base asset definition

TON Chain Specifications

Property	Value
SLIP44 Coin Type	607
Derivation Path	m/44'/607'/<account>' (3-level hardened)
Signing Algorithm	Ed25519
Address Format	User-friendly base64 (48 chars, WalletV4R2)
Decimals	9
CoinGecko Platform	the-open-network

Dependencies

Requires hdwallet TON support: https://github.com/shapeshift/hdwallet/pull/XXX

Environment Variables

VITE_TON_NODE_URL=https://toncenter.com/api/v2/jsonRPC
VITE_FEATURE_TON=true

Testing

• Build packages: yarn build:packages
• Type check: yarn type-check
• Generate assets: yarn generate:asset-data
• Manual testing with native wallet

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✨ Finishing touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Post copyable unit tests in a comment
• Commit unit tests in branch ton-chain

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