From 99f6558100feb103ba8835c42988dc38aacfadc2 Mon Sep 17 00:00:00 2001
From: Daniel Shiposha <mrshiposha@gmail.com>
Date: Mon, 25 Dec 2023 14:54:22 +0000
Subject: [PATCH] feat: add hrmp channel operations proposal scripts


---
--- /dev/null
+++ b/js-packages/scripts/hrmpchannel.ts
@@ -0,0 +1,162 @@
+import {ApiPromise, WsProvider} from '@polkadot/api';
+import {blake2AsHex} from '@polkadot/util-crypto';
+
+const proposeOpenChannel = async (relayApi: ApiPromise, receiverParaId: number) => {
+    const conf: any = await relayApi.query.configuration.activeConfig()
+        .then(data => data.toJSON());
+    const maxCapacity = conf.hrmpChannelMaxCapacity;
+    const maxSize = conf.hrmpChannelMaxMessageSize;
+
+    return relayApi.tx.hrmp.hrmpInitOpenChannel(
+        receiverParaId,
+        maxCapacity,
+        maxSize,
+    ).method.toHex();
+};
+
+const proposeAcceptChannel = (relayApi: ApiPromise, senderParaId: number) => {
+    return relayApi.tx.hrmp.hrmpAcceptOpenChannel(senderParaId).method.toHex();
+};
+
+async function main() {
+  const relayUrl = process.argv[2]
+  const uniqueParachainUrl = process.argv[3];
+  const otherParachainUrl = process.argv[4];
+  const op = process.argv[5];
+
+  const relayWsProvider = new WsProvider(relayUrl);
+  const relayApi = await ApiPromise.create({provider: relayWsProvider});
+
+  const uniqueWsProvider = new WsProvider(uniqueParachainUrl);
+  const uniqueApi = await ApiPromise.create({provider: uniqueWsProvider});
+
+  const otherWsProvider = new WsProvider(otherParachainUrl);
+  const otherApi = await ApiPromise.create({provider: otherWsProvider});
+
+  const uniqueParaId = await uniqueApi.query.parachainInfo.parachainId()
+    .then(data => data.toJSON() as number);
+
+  const otherParaId = await otherApi.query.parachainInfo.parachainId()
+    .then(data => data.toJSON() as number);
+
+  let encodedRelayCall: string;
+  if(op == 'open') {
+    encodedRelayCall = await proposeOpenChannel(relayApi, otherParaId);
+  } else if(op == 'accept') {
+    encodedRelayCall = proposeAcceptChannel(relayApi, otherParaId);
+  } else {
+    throw Error(`Unknown hrmp channel operation: ${op}`);
+  }
+
+  const relayDecimals = await relayApi.rpc.system.properties()
+    .then(data => data.tokenDecimals.unwrap()[0].toNumber());
+
+  const relayFee = 1 * (10 ** relayDecimals);
+
+  const proposal = uniqueApi.tx.polkadotXcm.send(
+    {
+        V3: {
+            parents: 1,
+            interior: 'Here',
+        }
+    },
+    {
+        V3: [
+            {
+                WithdrawAsset: [
+                    {
+                        id: {
+                            Concrete: {
+                                parents: 0,
+                                interior: 'Here',
+                            },
+                        },
+                        fun: {
+                            Fungible: relayFee,
+                        },
+                    },
+                ],
+            },
+            {
+                BuyExecution: {
+                    fees: {
+                        id: {
+                            Concrete: {
+                                parents: 0,
+                                interior: 'Here',
+                            },
+                        },
+                        fun: {
+                            Fungible: relayFee,
+                        },
+                    },
+                    weightLimit: 'Unlimited',
+                },
+            },
+            {
+                Transact: {
+                    originKind: 'Native',
+                    requireWeightAtMost: {
+                        refTime: 1000000000,
+                        proofSize: 65536,
+                    },
+                    call: {
+                        encoded: encodedRelayCall,
+                    },
+                },
+            },
+            'RefundSurplus',
+            {
+                DepositAsset: {
+                    assets: {
+                        Wild: {
+                            AllCounted: 1,
+                        },
+                    },
+                    beneficiary: {
+                        parents: 0,
+                        interior: {
+                            X1: {
+                                Parachain: uniqueParaId,
+                            },
+                        },
+                    },
+                },
+            },
+        ],
+    },
+  ).method.toHex();
+
+  const councilMembers = (await uniqueApi.query.council.members()).toJSON() as any[];
+  const councilProposalThreshold = Math.floor(councilMembers.length / 2) + 1;
+
+  const democracyProposalHash = blake2AsHex(proposal, 256);
+  const democracyProposalPreimage = uniqueApi.tx.preimage.notePreimage(proposal).method.toHex();
+
+  const democracyProposal = uniqueApi.tx.democracy.externalProposeDefault({
+    Legacy: democracyProposalHash,
+  });
+
+  const councilProposal = uniqueApi.tx.council.propose(
+    councilProposalThreshold,
+    democracyProposal,
+    democracyProposal.method.encodedLength,
+  ).method.toHex();
+
+  const proposeBatch = uniqueApi.tx.utility.batchAll([
+    democracyProposalPreimage,
+    councilProposal,
+  ]);
+
+  const encodedCall = proposeBatch.method.toHex();
+
+  console.log('-----------------');
+  console.log('Council Proposal: ', `https://polkadot.js.org/apps/?rpc=${uniqueParachainUrl}#/extrinsics/decode/${encodedCall}`);
+  console.log('-----------------');
+
+  await relayApi.disconnect();
+  await uniqueApi.disconnect();
+  await otherApi.disconnect();
+}
+
+await main();
--- a/js-packages/scripts/package.json
+++ b/js-packages/scripts/package.json
@@ -15,6 +15,7 @@
     "generateEnv": "yarn ts-node --esm ./generateEnv.ts",
     "propose-upgrade": "yarn ts-node --esm ./proposeupgrade.ts",
     "propose-fast-track": "yarn ts-node --esm ./proposefasttrack.ts",
-    "council-democracy-proposal": "yarn ts-node --esm ./councilproposal.ts"
+    "council-democracy-proposal": "yarn ts-node --esm ./councilproposal.ts",
+    "hrmp-channel": "yarn ts-node --esm ./hrmpchannel.ts"
   }
 }

-- 
gitstuff