test(evm): migrate cosmos deploy bash scripts off -b block (CON-256)

[wen-coding]

Bash twin of #3406's lib.js work. Submit cosmos txs with -b sync and
poll the actual on-chain side effect rather than relying on -b block —
under Autobahn the KV indexer that BroadcastTxCommit polls isn't
populated, so -b block can hang to its 60s timeout.

New shared helper integration_test/contracts/_tx_helpers.sh:

• store_wasm — submit wasm store -b sync, return new code_id once
  max wasm code_id grows (mirrors lib.js storeWasm).
• instantiate_wasm — submit wasm instantiate -b sync, return new
  contract address once it appears under code_id via list-contract-
  by-code set-diff (mirrors lib.js instantiateWasm).
• bank_send_and_wait — submit bank send -b sync, wait for sender's
  account sequence to advance. Denom-agnostic causal commit signal
  used between consecutive sends from the same key (mirrors lib.js
  getAccountSequence-based wait).
• _wait_until — generic check-loop with 30s default timeout, for
  one-off side-effect waits not covered by typed helpers.

Migrated scripts:

• deploy_wasm_contracts.sh: 30 × (store + instantiate). Helpers
  capture the new code_id / contract address inside the wait
  closure so a concurrent store/instantiate from another test can't
  substitute its value.
• create_tokenfactory_denoms.sh: 30 × create-denom. The denom is
  deterministic (factory//); the inline
  create_denom_and_wait polls denom-authority-metadata for non-empty
  admin (matches the lib.js createTokenFactoryTokenAndMint pattern).
• deploy_timelocked_token_contract.sh: 7 × bank send (admin funding
  7 admin/op/dest accounts sequentially) + 2 × store + 2 ×
  instantiate. bank_send_and_wait between consecutive funds prevents
  "account sequence mismatch" rejections when -b sync returns before
  the prior tx commits.
• deploy_dex_contract.sh: store + instantiate + dex register-contract
  • 4 × dex register-pairs. The dex txs have no convenient
    single-query side effect; inline dex_tx_and_wait waits for the
    sender's sequence to advance.

Wait-timeout cases preserve the original error contract: scripts
print to stderr and exit 1, same as before.

Co-Authored-By: Claude Opus 4.7 (1M context) noreply@anthropic.com

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The latest Buf updates on your PR. Results from workflow Buf / buf (pull_request).

Build	Format	Lint	Breaking	Updated (UTC)
✅ passed	✅ passed	✅ passed	✅ passed	May 20, 2026, 4:14 AM