Fix chain anchor: handle already-registered hashes and gas limit override - #79
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Add pre-check in anchor()/anchor_for() to detect already-registered hashes before sending transactions, preventing wasted gas and unhelpful revert errors. Includes DataAlreadyRegisteredError exception, CLI error handling with human-readable and JSON output, and non-fatal handling in chain protect --anchor-new.
RPC gas estimation can return values exceeding block limits. Add --gas CLI option and CHAIN_GAS_LIMIT env var to set an explicit gas limit, bypassing estimation. Applied to all chain write commands: anchor, access, status, transfer, delegate, transform, protect.
Anchors a hash, waits for propagation, then verifies a second anchor attempt raises DataAlreadyRegisteredError with correct attributes.
Verifies that setting an explicit gas limit too low for a contract call raises ChainTransactionError gracefully rather than an unhandled crash. Node rejects pre-broadcast, so no gas is wasted.
This was referenced Mar 2, 2026
dependencies was placed after [project.urls] section header, causing setuptools to parse it as a URL entry rather than a project dependency list. CI failed with "project.urls.dependencies must be string".
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Summary
chain anchornow pre-checks if a hash is already registered before sending a transaction, preventing wasted gas and unhelpful revert errors. Shows owner, type, and timestamp in both human-readable and JSON output.chain protect --anchor-newtreats already-registered new hash as non-fatal.--gasoption to all chain write commands (anchor,access,status,transfer,delegate,transform,protect) andCHAIN_GAS_LIMITenv var, bypassing RPC estimation that can return values exceeding block limits.Closes #76
Closes #75
Changes
exceptions.pyDataAlreadyRegisteredErrorwithdata_hash,owner,timestamp,data_typecore/chain_client.pyanchor()/anchor_for(),gas_limitparam, skip estimation when explicitcli.py--gason 7 write commands,gas_limitin_chain_configconfig.pyCHAIN_GAS_LIMITenv var.env.exampleCHAIN_GAS_LIMITREADME.mdCLAUDE.mdCHANGELOG.md[0.8.1]and[0.8.2]entries__init__.py/pyproject.toml0.8.0→0.8.2tests/test_chain_client.pytests/test_cli.pytests/test_integration.pyTest plan
pytest --ignore=tests/test_integration.py— 545 passedpytest tests/test_chain_client.py— 85 passedpytest tests/test_cli.py -k chain— 74 passed