I think I found it:
aeternity.contract = await aeternity.client.getContractInstance(registryContractSource, {contractAddress: aeternity.contractAddress, opt:{backend:'aevm'}});
where opt:{backend:‘aevm’} does the job
I think I found it:
aeternity.contract = await aeternity.client.getContractInstance(registryContractSource, {contractAddress: aeternity.contractAddress, opt:{backend:'aevm'}});
where opt:{backend:‘aevm’} does the job