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Introduce the ATA program, which derives deterministic per-token holding accounts from (owner, token_definition) via SHA256, eliminating the need to manually create and track holding account IDs. Program (programs/associated_token_account/): - Create, Transfer, and Burn instructions with PDA-based authorization - Deterministic address derivation: SHA256(owner || definition) → seed → AccountId - Idempotent Create (no-op if ATA already exists) Wallet CLI (`wallet ata`): - `address` — derive ATA address locally (no network call) - `create` — initialize an ATA on-chain - `send` — transfer tokens from owner's ATA to a recipient - `burn` — burn tokens from owner's ATA - `list` — query ATAs across multiple token definitions Usage: wallet deploy-program artifacts/program_methods/associated_token_account.bin wallet ata address --owner <ID> --token-definition <DEF_ID> wallet ata create --owner Public/<ID> --token-definition <DEF_ID> wallet ata send --from Public/<ID> --token-definition <DEF_ID> --to <RECIPIENT> --amount 100 wallet ata burn --holder Public/<ID> --token-definition <DEF_ID> --amount 50 wallet ata list --owner <ID> --token-definition <DEF1> <DEF2> Includes tutorial: docs/LEZ testnet v0.1 tutorials/associated-token-accounts.md