## 1. Public APIs

- [x] 1.1 Add the documented checked-burn transaction builder to `SolanaBlockChain` using the existing burn input ValueTags.
- [x] 1.2 Add the documented human-readable SPL-token burn operation to `SolanaWallet` with submission-only semantics.

## 2. Blockchain Construction

- [x] 2.1 Implement pre-RPC raw amount, decimal, program, and Solana address validation in `SolanaBlockChainImpl`.
- [x] 2.2 Serialize one unsigned `BurnChecked` transaction with owner authority/fee-payer semantics, a recent blockhash, and selectable legacy SPL Token or Token-2022 program.
- [x] 2.3 Add direct, uncached burn-construction delegation to `CachedSolanaBlockChain`.

## 3. Wallet Burn Flow

- [x] 3.1 Implement mint lookup, supported-program detection, supply/holding lookup, decimal consistency, and exact human-to-raw amount conversion in `SolanaWalletImpl`.
- [x] 3.2 Enforce missing-state and balance failures while permitting an exact complete-balance burn without closing the token account.
- [x] 3.3 Build, sign, and submit exactly once through existing flows, return the signature immediately, and add no awaiting, retry, or resubmission.

## 4. Verification

- [x] 4.1 Compile main and test source sets without adding or modifying tests and without executing a live burn or submission.
- [x] 4.2 Run strict OpenSpec validation and `git diff --check`.
- [x] 4.3 Review the complete diff for both token programs, exact amount conversion, complete-balance support, direct cached delegation, submission-only behavior, no generated/test changes, and no unrelated modifications.