feat(operator): 🏗️ Add Preimage pallet (#23)

Co-authored-by: Facundo Farall <37149322+ffarall@users.noreply.github.com>

operator/Cargo.lock

@@ -1609,6 +1609,7 @@ dependencies = [
  "pallet-grandpa",
  "pallet-mmr",
  "pallet-multisig",
+ "pallet-preimage",
  "pallet-session",
  "pallet-sudo",
  "pallet-timestamp",
@@ -5955,6 +5956,22 @@ dependencies = [
  "sp-runtime",
 ]
 
+[[package]]
+name = "pallet-preimage"
+version = "38.0.0"
+source = "git+https://github.com/paritytech/polkadot-sdk?branch=stable2409#43d7b1e329f50a37cbd67e15aae70c60556cbb59"
+dependencies = [
+ "frame-benchmarking",
+ "frame-support",
+ "frame-system",
+ "log",
+ "parity-scale-codec",
+ "scale-info",
+ "sp-core",
+ "sp-io",
+ "sp-runtime",
+]
+
 [[package]]
 name = "pallet-session"
 version = "38.0.0"

operator/Cargo.toml

@@ -86,6 +86,7 @@ pallet-babe = { git = "https://github.com/paritytech/polkadot-sdk", branch = "st
 pallet-balances = { git = "https://github.com/paritytech/polkadot-sdk", branch = "stable2409", default-features = false }
 pallet-grandpa = { git = "https://github.com/paritytech/polkadot-sdk", branch = "stable2409", default-features = false }
 pallet-multisig = { git = "https://github.com/paritytech/polkadot-sdk", branch = "stable2409", default-features = false }
+pallet-preimage = { git = "https://github.com/paritytech/polkadot-sdk", branch = "stable2409", default-features = false }
 pallet-session = { git = "https://github.com/paritytech/polkadot-sdk", branch = "stable2409", default-features = false }
 pallet-sudo = { git = "https://github.com/paritytech/polkadot-sdk", branch = "stable2409", default-features = false }
 pallet-timestamp = { git = "https://github.com/paritytech/polkadot-sdk", branch = "stable2409", default-features = false }

operator/runtime/Cargo.toml

@@ -27,6 +27,7 @@ pallet-babe.workspace = true
 pallet-balances.workspace = true
 pallet-grandpa.workspace = true
 pallet-multisig.workspace = true
+pallet-preimage.workspace = true
 pallet-session.workspace = true
 pallet-sudo.workspace = true
 pallet-timestamp.workspace = true
@@ -95,7 +96,7 @@ std = [
 	"pallet-grandpa/std",
     "pallet-multisig/std",
 	"pallet-mmr/std",
-	"pallet-session/std",
+	"pallet-preimage/std",
     "pallet-session/std",
     "pallet-sudo/std",
     "pallet-timestamp/std",
@@ -144,6 +145,7 @@ runtime-benchmarks = [
 	"pallet-balances/runtime-benchmarks",
     "pallet-grandpa/runtime-benchmarks",
     "pallet-multisig/runtime-benchmarks",
+    "pallet-preimage/runtime-benchmarks",
     "pallet-sudo/runtime-benchmarks",
     "pallet-timestamp/runtime-benchmarks",
     "pallet-utility/runtime-benchmarks",
@@ -166,6 +168,7 @@ try-runtime = [
     "pallet-balances/try-runtime",
     "pallet-grandpa/try-runtime",
     "pallet-multisig/try-runtime",
+    "pallet-preimage/try-runtime",
     "pallet-session/try-runtime",
     "pallet-sudo/try-runtime",
     "pallet-timestamp/try-runtime",

operator/runtime/src/benchmarks.rs

@@ -27,6 +27,7 @@ frame_benchmarking::define_benchmarks!(
     [frame_benchmarking, BaselineBench::<Runtime>]
     [frame_system, SystemBench::<Runtime>]
     [pallet_balances, Balances]
+    [pallet_preimage, Preimage]
     [pallet_multisig, Multisig]
     [pallet_timestamp, Timestamp]
     [pallet_utility, Utility]

operator/runtime/src/configs/mod.rs

@@ -26,6 +26,9 @@
 use crate::EvmChainId;
 use crate::OriginCaller;
 use crate::Timestamp;
+use crate::STORAGE_BYTE_FEE;
+use crate::SUPPLY_FACTOR;
+use crate::UNIT;
 use crate::{Historical, SessionKeys, ValidatorSet};
 
 // Local module imports
@@ -38,6 +41,8 @@ use super::{
 use codec::{Decode, Encode};
 use datahaven_runtime_common::gas::WEIGHT_PER_GAS;
 use datahaven_runtime_common::time::{EpochDurationInBlocks, MILLISECS_PER_BLOCK, MINUTES};
+use frame_support::traits::fungible::HoldConsideration;
+use frame_support::traits::LinearStoragePrice;
 use frame_support::{
     derive_impl, parameter_types,
     traits::{
@@ -233,7 +238,27 @@ impl pallet_balances::Config for Runtime {
     type FreezeIdentifier = RuntimeFreezeReason;
     type MaxFreezes = VariantCountOf<RuntimeFreezeReason>;
     type RuntimeHoldReason = RuntimeHoldReason;
-    type RuntimeFreezeReason = RuntimeHoldReason;
+    type RuntimeFreezeReason = RuntimeFreezeReason;
+}
+
+parameter_types! {
+    pub const PreimageBaseDeposit: Balance = 5 * UNIT * SUPPLY_FACTOR ;
+    pub const PreimageByteDeposit: Balance = STORAGE_BYTE_FEE;
+    pub const PreimageHoldReason: RuntimeHoldReason =
+        RuntimeHoldReason::Preimage(pallet_preimage::HoldReason::Preimage);
+}
+
+impl pallet_preimage::Config for Runtime {
+    type RuntimeEvent = RuntimeEvent;
+    type Currency = Balances;
+    type ManagerOrigin = EnsureRoot<AccountId>;
+    type Consideration = HoldConsideration<
+        AccountId,
+        Balances,
+        PreimageHoldReason,
+        LinearStoragePrice<PreimageBaseDeposit, PreimageByteDeposit, Balance>,
+    >;
+    type WeightInfo = ();
 }
 
 parameter_types! {

operator/runtime/src/lib.rs

@@ -258,6 +258,9 @@ mod runtime {
     #[runtime::pallet_index(20)]
     pub type Utility = pallet_utility;
 
+    #[runtime::pallet_index(22)]
+    pub type Preimage = pallet_preimage;
+
     #[runtime::pallet_index(24)]
     pub type Multisig = pallet_multisig;