2021-06-16 10:20:05 +00:00
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# Notary service in chains
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[Notary service](https://github.com/neo-project/neo/issues/1573#issuecomment-704874472)
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is a service that provides on-chain network assistance to form multisignature
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transactions. Inner Ring (Alphabet) nodes use multisignature transactions to
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create containers, approve balance changes, update network map, tick epochs,
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etc. With notary service, it takes up to seven times fewer transactions
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to do these operations. Notary service calculates the exact amount of GAS
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to execute transaction, therefore operations are cheaper (withdraw fee **with**
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notary is less than 0.5 GAS; withdraw fee **without** notary is up to 7.0 GAS).
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By default, main chain service is running without notary service, and side chain
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running with notary service. However, you can change that in configuration.
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# Disable notary service in side chain
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To disable notary service in side chain do these steps.
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1. Update `.env` and choose notary disabled chain dump for side chain.
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```
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MORPH_CHAIN_URL="https://github.com/nspcc-dev/neofs-contract/releases/download/v0.9.0/devenv_sidechain_notary_disabled.gz"
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```
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Make sure to update chain dump files with `make get` target.
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2. Update `service/morph_chain/protocol.privnet.yml` and disable notary settings
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and state root in header.
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```yaml
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ProtocolConfiguration:
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StateRootInHeader: false
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P2PSigExtensions: false
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ApplicationConfiguration:
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P2PNotary:
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Enabled: false
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```
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3. Update `services/ir/.ir.env` and disable notary support.
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```
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NEOFS_IR_WITHOUT_NOTARY=true
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```
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Chain dump without notary service does not have predefined network map.
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Therefore, you need to wait about 5 minutes until new epoch tick with updated
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network map.
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2021-07-22 17:22:58 +00:00
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4. Enable helper commands
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To enable helper commands such as `make tick.epoch` or `make update.epoch_duration`
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make sure to export non-empty `NEOFS_NOTARY_DISABLED` environment variable.
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```
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$ export NEOFS_NOTARY_DISABLED=1
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```
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Use `unset` command to return it back.
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```
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$ unset NEOFS_NOTARY_DISABLED
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```
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2021-06-16 10:20:05 +00:00
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# Enable notary service in main chain
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To enable notary service in main chain do these steps.
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1. Update `.env` and choose notary enabled chain dump for main chain.
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```
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CHAIN_URL="https://github.com/nspcc-dev/neofs-contract/releases/download/v0.9.0/devenv_mainchain.gz"
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```
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Make sure to update chain dump files with `make get` target.
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2. Update `service/chain/protocol.privnet.yml` and enable notary settings.
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```yaml
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ProtocolConfiguration:
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P2PSigExtensions: true
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ApplicationConfiguration:
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P2PNotary:
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Enabled: true
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```
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3. Update `services/ir/.ir.env` and enable main chain notary support.
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```
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NEOFS_IR_WITHOUT_MAIN_NOTARY=false
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```
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Main chain generates a block once per 15 seconds, so Inner Ring takes about
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15-30 seconds to make a notary deposit in main chain after startup. Then
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neofs-dev-env is ready to work.
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