#44·First Statemint HRMP Channels

So far, five parachains have requested an HRMP channel with Statemint. This motion accepts them all and opens return channels. ## Opening Notes ### Handy Info - Treasury Address: `13UVJyLnbVp9RBZYFwFGyDvVd1y27Tt8tkntv6Q7JVPhFsTB` - Treasury `AccountId`: `0x6d6f646c70792f74727372790000000000000000000000000000000000000000` - Statemint Address: `13YMK2edbuhwMBxeUWm9c643A2wyYHwSVh1bCM7tShtg7Dtk` - Statemint `AccountId`: `0x70617261e8030000000000000000000000000000000000000000000000000000` ### Parachains that want channels - 2011 - 2000 - 2004 - 2006 - 2012 ### Channel Config - `maxCapacity: 1,000` - `maxTotalSize: 102,400` ### HRMP Config - `hrmpSenderDeposit: 100,000,000,000` - `hrmpRecipientDeposit: 100,000,000,000` ## Call Construction These are constructed **backwards.** That is, the call to use as the proposal is at the **end.** ### Relay Chain Call to Execute First, we need the call that Statemint will execute on the Relay Chain. This accepts all channel requests and returns channel requests to the initiators.   Encoded Call Data: ``` 0x1a02283c01db0700003c01d00700003c01d40700003c01d60700003c01dc0700003c00db070000e8030000009001003c00d0070000e8030000009001003c00d4070000e8030000009001003c00d6070000e8030000009001003c00dc070000e803000000900100 ``` ### Message from Statemint The above message needs to come _from Statemint._ So we put it into an XCM (the "Transact" instruction) along with purchasing some execution capacity and returning any leftover fees to the Treasury.   Encoded Call Data: ``` 0x1f0001010002140004000000000700c817a80413000000000700c817a80400060002286bee9d011a02283c01db0700003c01d00700003c01d40700003c01d60700003c01dc0700003c00db070000e8030000009001003c00d0070000e8030000009001003c00d4070000e8030000009001003c00d6070000e8030000009001003c00dc070000e803000000900100140d01010000000004000101006d6f646c70792f74727372790000000000000000000000000000000000000000 ``` ### Proposal on the Relay Chain But, governance is on the Relay Chain, not Statemint. So take some DOT from the Treasury (100 DOT for 10 channels at 10 DOT each plus 2 DOT for fees) and send a message to Statemint telling it to send a message back. This is the proposal to vote on.  Encoded Call Data: ``` 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 ``` Call Hash: ``` 0x6306b068f6a71eb1db5abd9609a0ffbbe7c441c9144ecf8a49e7c2bc19f7f6e9 ``` ## Appendix: Relevant Storage Items **`configuration.activeConfig: PolkadotRuntimeParachainsConfigurationHostConfiguration`** ```json= { maxCodeSize: 10,485,760 maxHeadDataSize: 20,480 maxUpwardQueueCount: 10 maxUpwardQueueSize: 51,200 maxUpwardMessageSize: 51,200 maxUpwardMessageNumPerCandidate: 10 hrmpMaxMessageNumPerCandidate: 10 validationUpgradeCooldown: 14,400 validationUpgradeDelay: 600 maxPovSize: 5,242,880 maxDownwardMessageSize: 51,200 umpServiceTotalWeight: 100,000,000,000 hrmpMaxParachainOutboundChannels: 10 hrmpMaxParathreadOutboundChannels: 0 hrmpSenderDeposit: 100,000,000,000 hrmpRecipientDeposit: 100,000,000,000 hrmpChannelMaxCapacity: 1,000 hrmpChannelMaxTotalSize: 102,400 hrmpMaxParachainInboundChannels: 10 hrmpMaxParathreadInboundChannels: 0 hrmpChannelMaxMessageSize: 102,400 codeRetentionPeriod: 14,400 parathreadCores: 0 parathreadRetries: 0 groupRotationFrequency: 10 chainAvailabilityPeriod: 10 threadAvailabilityPeriod: 10 schedulingLookahead: 1 maxValidatorsPerCore: 5 maxValidators: 200 disputePeriod: 6 disputePostConclusionAcceptancePeriod: 600 disputeMaxSpamSlots: 2 disputeConclusionByTimeOutPeriod: 600 noShowSlots: 2 nDelayTranches: 89 zerothDelayTrancheWidth: 0 neededApprovals: 30 relayVrfModuloSamples: 40 umpMaxIndividualWeight: 20,000,000,000 pvfCheckingEnabled: false pvfVotingTtl: 2 minimumValidationUpgradeDelay: 20 } ``` **`hrmp.hrmpOpenChannelRequests: Option`** ```json [ [ [ { sender: 2,011 recipient: 1,000 } ] { confirmed: false age: 0 senderDeposit: 100,000,000,000 maxMessageSize: 102,400 maxCapacity: 1,000 maxTotalSize: 102,400 } ] [ [ { sender: 2,000 recipient: 2,035 } ] { confirmed: false age: 0 senderDeposit: 100,000,000,000 maxMessageSize: 102,400 maxCapacity: 1,000 maxTotalSize: 102,400 } ] [ [ { sender: 2,000 recipient: 2,034 } ] { confirmed: false age: 0 senderDeposit: 100,000,000,000 maxMessageSize: 102,400 maxCapacity: 1,000 maxTotalSize: 102,400 } ] [ [ { sender: 2,000 recipient: 2,032 } ] { confirmed: false age: 0 senderDeposit: 100,000,000,000 maxMessageSize: 102,400 maxCapacity: 1,000 maxTotalSize: 102,400 } ] [ [ { sender: 2,012 recipient: 2,000 } ] { confirmed: false age: 0 senderDeposit: 100,000,000,000 maxMessageSize: 102,400 maxCapacity: 1,000 maxTotalSize: 102,400 } ] [ [ { sender: 2,000 recipient: 1,000 } ] { confirmed: false age: 0 senderDeposit: 100,000,000,000 maxMessageSize: 102,400 maxCapacity: 1,000 maxTotalSize: 102,400 } ] [ [ { sender: 2,004 recipient: 1,000 } ] { confirmed: false age: 0 senderDeposit: 100,000,000,000 maxMessageSize: 102,400 maxCapacity: 1,000 maxTotalSize: 102,400 } ] [ [ { sender: 2,006 recipient: 1,000 } ] { confirmed: false age: 0 senderDeposit: 100,000,000,000 maxMessageSize: 102,400 maxCapacity: 1,000 maxTotalSize: 102,400 } ] [ [ { sender: 2,012 recipient: 1,000 } ] { confirmed: false age: 0 senderDeposit: 100,000,000,000 maxMessageSize: 102,400 maxCapacity: 1,000 maxTotalSize: 102,400 } ] ] ```