From 13681e2a78e09e1eeb0925e95d35560e4a622120 Mon Sep 17 00:00:00 2001
From: crthpl <theo@reinsberg.info>
Date: Sun, 8 Mar 2026 09:24:24 -0400
Subject: [PATCH 1/4] Allow sudoed admins higher decimal precision for orders
 and settlements

Sudoed admins can now use:
- 2 decimal places for settlement values (create market min/max, settle price)
- 4 decimal places for order prices and sizes

Regular users retain 1 decimal place (frontend) / 2 decimal places (backend).
---
 backend/src/db.rs                             | 27 +++++++++++++++++--
 backend/src/handle_socket.rs                  |  2 +-
 backend/src/seed.rs                           |  2 +-
 .../lib/components/forms/createMarket.svelte  | 14 ++++++----
 .../lib/components/forms/settleMarket.svelte  | 16 ++++++-----
 .../src/lib/components/marketDataUtils.ts     | 14 ++++++++++
 .../src/lib/components/marketOrders.svelte    | 14 ++++++----
 7 files changed, 69 insertions(+), 20 deletions(-)

diff --git a/backend/src/db.rs b/backend/src/db.rs
index 64e52dd9..e1f93b28 100644
--- a/backend/src/db.rs
+++ b/backend/src/db.rs
@@ -2663,6 +2663,7 @@ impl DB {
         &self,
         owner_id: i64,
         create_order: websocket_api::CreateOrder,
+        is_sudo: bool,
     ) -> SqlxResult<ValidationResult<OrderCreated>> {
         let Ok(price) = Decimal::try_from(create_order.price) else {
             return Ok(Err(ValidationFailure::InvalidPrice));
@@ -2681,11 +2682,12 @@ impl DB {
         let price = price.normalize();
         let size = size.normalize();
 
-        if price.scale() > 2 || price.mantissa() > 1_000_000_000_000 {
+        let max_scale = if is_sudo { 4 } else { 2 };
+        if price.scale() > max_scale || price.mantissa() > 1_000_000_000_000 {
             return Ok(Err(ValidationFailure::InvalidPrice));
         }
 
-        if size <= dec!(0) || size.scale() > 2 || size.mantissa() > 1_000_000_000_000 {
+        if size <= dec!(0) || size.scale() > max_scale || size.mantissa() > 1_000_000_000_000 {
             return Ok(Err(ValidationFailure::InvalidSize));
         }
 
@@ -4602,6 +4604,7 @@ mod tests {
                     size: 1.0,
                     side: websocket_api::Side::Bid as i32,
                 },
+            false,
             )
             .await?;
         assert!(matches!(order_status, Err(ValidationFailure::InvalidPrice)));
@@ -4615,6 +4618,7 @@ mod tests {
                     size: 100.0,
                     side: websocket_api::Side::Bid as i32,
                 },
+            false,
             )
             .await?;
         assert!(matches!(
@@ -4631,6 +4635,7 @@ mod tests {
                     size: 100.0,
                     side: websocket_api::Side::Offer as i32,
                 },
+            false,
             )
             .await?;
         assert!(matches!(
@@ -4647,6 +4652,7 @@ mod tests {
                     size: -1.0,
                     side: websocket_api::Side::Bid as i32,
                 },
+            false,
             )
             .await?;
         assert!(matches!(order_status, Err(ValidationFailure::InvalidSize)));
@@ -4660,6 +4666,7 @@ mod tests {
                     size: 1.0,
                     side: websocket_api::Side::Bid as i32,
                 },
+            false,
             )
             .await?;
         assert!(matches!(order_status, Err(ValidationFailure::InvalidPrice)));
@@ -4673,6 +4680,7 @@ mod tests {
                     size: 1.0,
                     side: websocket_api::Side::Offer as i32,
                 },
+            false,
             )
             .await?;
         assert!(order_status.is_ok());
@@ -4696,6 +4704,7 @@ mod tests {
                     size: 1.0,
                     side: websocket_api::Side::Bid as i32,
                 },
+            false,
             )
             .await?;
         let Ok(OrderCreated {
@@ -4771,6 +4780,7 @@ mod tests {
                     size: 1.0,
                     side: websocket_api::Side::Offer as i32,
                 },
+            false,
             )
             .await?;
         assert!(matches!(
@@ -4811,6 +4821,7 @@ mod tests {
                 size: 1.0,
                 side: websocket_api::Side::Bid as i32,
             },
+        false,
         )
         .await?
         .unwrap();
@@ -4823,6 +4834,7 @@ mod tests {
                 size: 1.0,
                 side: websocket_api::Side::Offer as i32,
             },
+        false,
         )
         .await?
         .unwrap();
@@ -4853,6 +4865,7 @@ mod tests {
                     size: 0.5,
                     side: websocket_api::Side::Offer as i32,
                 },
+            false,
             )
             .await?;
 
@@ -4927,6 +4940,7 @@ mod tests {
                 size: 1.0,
                 side: websocket_api::Side::Bid as i32,
             },
+        false,
         )
         .await?
         .unwrap();
@@ -4940,6 +4954,7 @@ mod tests {
                     size: 0.5,
                     side: websocket_api::Side::Offer as i32,
                 },
+            false,
             )
             .await?;
 
@@ -4987,6 +5002,7 @@ mod tests {
                 size: 10.0,
                 side: websocket_api::Side::Bid as i32,
             },
+        false,
         )
         .await?
         .unwrap();
@@ -5000,6 +5016,7 @@ mod tests {
                     size: 15.0,
                     side: websocket_api::Side::Bid as i32,
                 },
+            false,
             )
             .await?;
 
@@ -5016,6 +5033,7 @@ mod tests {
                 size: 10.0,
                 side: websocket_api::Side::Bid as i32,
             },
+        false,
         )
         .await?
         .unwrap();
@@ -5063,6 +5081,7 @@ mod tests {
                 size: 1.0,
                 side: websocket_api::Side::Bid as i32,
             },
+        false,
         )
         .await?
         .unwrap();
@@ -5074,6 +5093,7 @@ mod tests {
                 size: 1.0,
                 side: websocket_api::Side::Bid as i32,
             },
+        false,
         )
         .await?
         .unwrap();
@@ -5085,6 +5105,7 @@ mod tests {
                 size: 1.0,
                 side: websocket_api::Side::Bid as i32,
             },
+        false,
         )
         .await?
         .unwrap();
@@ -5096,6 +5117,7 @@ mod tests {
                 size: 1.0,
                 side: websocket_api::Side::Bid as i32,
             },
+        false,
         )
         .await?
         .unwrap();
@@ -5109,6 +5131,7 @@ mod tests {
                     size: 4.0,
                     side: websocket_api::Side::Offer as i32,
                 },
+            false,
             )
             .await?;
 
diff --git a/backend/src/handle_socket.rs b/backend/src/handle_socket.rs
index d4a9f224..c2f3f3b0 100644
--- a/backend/src/handle_socket.rs
+++ b/backend/src/handle_socket.rs
@@ -663,7 +663,7 @@ async fn handle_client_message(
         }
         CM::CreateOrder(create_order) => {
             check_mutate_rate_limit!("CreateOrder");
-            match db.create_order(acting_as, create_order).await? {
+            match db.create_order(acting_as, create_order, admin_id.is_some()).await? {
                 Ok(order_created) => {
                     for user_id in order_created.fills.iter().map(|fill| &fill.owner_id) {
                         subscriptions.notify_portfolio(*user_id);
diff --git a/backend/src/seed.rs b/backend/src/seed.rs
index 17cc7558..c99b1e72 100644
--- a/backend/src/seed.rs
+++ b/backend/src/seed.rs
@@ -289,7 +289,7 @@ pub async fn seed_dev_data(db: &DB, pool: &SqlitePool) -> Result<(), anyhow::Err
             side: order.side.into(),
         };
 
-        match db.create_order(account_id, create_order).await? {
+        match db.create_order(account_id, create_order, false).await? {
             Ok(result) => {
                 let trades_count = result.trades.len();
                 if trades_count > 0 {
diff --git a/frontend/src/lib/components/forms/createMarket.svelte b/frontend/src/lib/components/forms/createMarket.svelte
index cee9bc61..0d23a5d1 100644
--- a/frontend/src/lib/components/forms/createMarket.svelte
+++ b/frontend/src/lib/components/forms/createMarket.svelte
@@ -7,13 +7,17 @@
 	import { Input } from '$lib/components/ui/input';
 	import { Textarea } from '$lib/components/ui/textarea';
 	import { Checkbox } from '$lib/components/ui/checkbox';
-	import { roundToTenth } from '$lib/components/marketDataUtils';
+	import { roundToTenth, roundToHundredth } from '$lib/components/marketDataUtils';
 	import { websocket_api } from 'schema-js';
 	import { protoSuperForm } from './protoSuperForm';
 	import type { Snippet } from 'svelte';
 	import X from '@lucide/svelte/icons/x';
 	import Plus from '@lucide/svelte/icons/plus';
 
+	const isSudo = $derived(serverState.isAdmin && serverState.sudoEnabled);
+	const settlementStep = $derived(isSudo ? '0.01' : '0.1');
+	const roundSettlement = $derived(isSudo ? roundToHundredth : roundToTenth);
+
 	interface Props {
 		children: Snippet;
 		onclick?: () => void;
@@ -221,10 +225,10 @@
 							{...props}
 							type="number"
 							max="1000000000000"
-							step="0.1"
+							step={settlementStep}
 							bind:value={$formData.minSettlement}
 							onblur={() => {
-								$formData.minSettlement = roundToTenth(
+								$formData.minSettlement = roundSettlement(
 									$formData.minSettlement as unknown as number
 								);
 							}}
@@ -241,10 +245,10 @@
 							{...props}
 							type="number"
 							max="1000000000000"
-							step="0.1"
+							step={settlementStep}
 							bind:value={$formData.maxSettlement}
 							onblur={() => {
-								$formData.maxSettlement = roundToTenth(
+								$formData.maxSettlement = roundSettlement(
 									$formData.maxSettlement as unknown as number
 								);
 							}}
diff --git a/frontend/src/lib/components/forms/settleMarket.svelte b/frontend/src/lib/components/forms/settleMarket.svelte
index 974f798a..ef95ee84 100644
--- a/frontend/src/lib/components/forms/settleMarket.svelte
+++ b/frontend/src/lib/components/forms/settleMarket.svelte
@@ -1,18 +1,22 @@
 <script lang="ts">
-	import { sendClientMessage } from '$lib/api.svelte';
+	import { sendClientMessage, serverState } from '$lib/api.svelte';
 	import * as AlertDialog from '$lib/components/ui/alert-dialog';
 	import * as Dialog from '$lib/components/ui/dialog';
 	import * as Form from '$lib/components/ui/form';
 	import * as Popover from '$lib/components/ui/popover';
 	import { Input } from '$lib/components/ui/input';
 	import { Button } from '$lib/components/ui/button';
-	import { roundToTenth } from '$lib/components/marketDataUtils';
+	import { roundToTenth, roundToHundredth } from '$lib/components/marketDataUtils';
 	import ChevronRight from '@lucide/svelte/icons/chevron-right';
 	import ChevronDown from '@lucide/svelte/icons/chevron-down';
 	import { websocket_api } from 'schema-js';
 	import { protoSuperForm } from './protoSuperForm';
 	import { formatMarketName } from '$lib/utils';
 
+	const isSudo = $derived(serverState.isAdmin && serverState.sudoEnabled);
+	const settleStep = $derived(isSudo ? '0.01' : '0.1');
+	const roundSettle = $derived(isSudo ? roundToHundredth : roundToTenth);
+
 	interface Props {
 		id: number | null | undefined;
 		name: string | null | undefined;
@@ -92,13 +96,13 @@
 								type="number"
 								min={minSettlement}
 								max={maxSettlement}
-								step="0.1"
+								step={settleStep}
 								placeholder="Settle Price"
 								aria-label="Settle Price"
 								class="h-10 w-32"
 								bind:value={$formData.settlePrice}
 								onblur={() => {
-									$formData.settlePrice = roundToTenth($formData.settlePrice as unknown as number);
+									$formData.settlePrice = roundSettle($formData.settlePrice as unknown as number);
 								}}
 							/>
 						{/snippet}
@@ -133,13 +137,13 @@
 								type="number"
 								min={minSettlement}
 								max={maxSettlement}
-								step="0.1"
+								step={settleStep}
 								placeholder="Settle Price"
 								aria-label="Settle Price"
 								class="h-10"
 								bind:value={$formData.settlePrice}
 								onblur={() => {
-									$formData.settlePrice = roundToTenth($formData.settlePrice as unknown as number);
+									$formData.settlePrice = roundSettle($formData.settlePrice as unknown as number);
 								}}
 							/>
 						{/snippet}
diff --git a/frontend/src/lib/components/marketDataUtils.ts b/frontend/src/lib/components/marketDataUtils.ts
index 02e1f790..c2e81fa6 100644
--- a/frontend/src/lib/components/marketDataUtils.ts
+++ b/frontend/src/lib/components/marketDataUtils.ts
@@ -223,6 +223,20 @@ export function roundToTenth<T extends number | string | null | undefined>(value
 	return Number(tenthFormatter.format(numeric));
 }
 
+const hundredthFormatter = new Intl.NumberFormat(undefined, {
+	maximumFractionDigits: 2,
+	useGrouping: false
+});
+
+export function roundToHundredth<T extends number | string | null | undefined>(
+	value: T
+): T | number {
+	if (value === '' || value === null || value === undefined) return value;
+	const numeric = typeof value === 'number' ? value : Number(value);
+	if (!Number.isFinite(numeric)) return value;
+	return Number(hundredthFormatter.format(numeric));
+}
+
 export function roundToWhole<T extends number | string | null | undefined>(value: T): T | number {
 	if (value === '' || value === null || value === undefined) return value;
 	const numeric = typeof value === 'number' ? value : Number(value);
diff --git a/frontend/src/lib/components/marketOrders.svelte b/frontend/src/lib/components/marketOrders.svelte
index 8e38c5f6..e855e290 100644
--- a/frontend/src/lib/components/marketOrders.svelte
+++ b/frontend/src/lib/components/marketOrders.svelte
@@ -129,10 +129,13 @@
 		localStorage.setItem(zapLimitsKey, JSON.stringify(limits));
 	});
 
-	function hasMoreThanOneDecimal(value: string | number): boolean {
+	const isSudo = $derived(serverState.isAdmin && serverState.sudoEnabled);
+	const maxDecimals = $derived(isSudo ? 4 : 1);
+
+	function tooManyDecimals(value: string | number): boolean {
 		const str = String(value);
 		const match = str.match(/\.(\d+)/);
-		return match ? match[1].length > 1 : false;
+		return match ? match[1].length > maxDecimals : false;
 	}
 
 	function validatePrice(
@@ -143,7 +146,7 @@
 		if (value === '' || value === null || value === undefined) return 'Price is required';
 		const num = Number(value);
 		if (!Number.isFinite(num)) return 'Invalid number';
-		if (hasMoreThanOneDecimal(value)) return 'Max 1 decimal place';
+		if (tooManyDecimals(value)) return `Max ${maxDecimals} decimal place${maxDecimals > 1 ? 's' : ''}`;
 		if (min != null && num < min) return `Min price is ${min}`;
 		if (max != null && num > max) return `Max price is ${max}`;
 		return '';
@@ -153,7 +156,7 @@
 		if (value === '' || value === null || value === undefined) return 'Size is required';
 		const num = Number(value);
 		if (!Number.isFinite(num)) return 'Invalid number';
-		if (hasMoreThanOneDecimal(value)) return 'Max 1 decimal place';
+		if (tooManyDecimals(value)) return `Max ${maxDecimals} decimal place${maxDecimals > 1 ? 's' : ''}`;
 		if (num <= 0) return 'Size must be positive';
 		return '';
 	}
@@ -268,7 +271,8 @@
 	function limitDecimals(e: Event) {
 		const input = e.target as HTMLInputElement;
 		const value = input.value;
-		const match = value.match(/^(-?\d*\.?\d?)/);
+		const pattern = new RegExp(`^(-?\\d*\\.?\\d{0,${maxDecimals}})`);
+		const match = value.match(pattern);
 		if (match && match[1] !== value) {
 			input.value = match[1];
 			// Trigger reactive update

From 050e14a70956b81f7dbbeb4f443fe1486caafedb Mon Sep 17 00:00:00 2001
From: crthpl <theo@reinsberg.info>
Date: Sun, 8 Mar 2026 09:42:35 -0400
Subject: [PATCH 2/4] Fix prettier formatting in marketOrders.svelte

---
 frontend/src/lib/components/marketOrders.svelte | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/frontend/src/lib/components/marketOrders.svelte b/frontend/src/lib/components/marketOrders.svelte
index e855e290..2acfaee5 100644
--- a/frontend/src/lib/components/marketOrders.svelte
+++ b/frontend/src/lib/components/marketOrders.svelte
@@ -146,7 +146,8 @@
 		if (value === '' || value === null || value === undefined) return 'Price is required';
 		const num = Number(value);
 		if (!Number.isFinite(num)) return 'Invalid number';
-		if (tooManyDecimals(value)) return `Max ${maxDecimals} decimal place${maxDecimals > 1 ? 's' : ''}`;
+		if (tooManyDecimals(value))
+			return `Max ${maxDecimals} decimal place${maxDecimals > 1 ? 's' : ''}`;
 		if (min != null && num < min) return `Min price is ${min}`;
 		if (max != null && num > max) return `Max price is ${max}`;
 		return '';
@@ -156,7 +157,8 @@
 		if (value === '' || value === null || value === undefined) return 'Size is required';
 		const num = Number(value);
 		if (!Number.isFinite(num)) return 'Invalid number';
-		if (tooManyDecimals(value)) return `Max ${maxDecimals} decimal place${maxDecimals > 1 ? 's' : ''}`;
+		if (tooManyDecimals(value))
+			return `Max ${maxDecimals} decimal place${maxDecimals > 1 ? 's' : ''}`;
 		if (num <= 0) return 'Size must be positive';
 		return '';
 	}

From 733b0814ec3afa8c9c7da9f9cd7419f678c93f63 Mon Sep 17 00:00:00 2001
From: crthpl <theo@reinsberg.info>
Date: Sun, 8 Mar 2026 10:06:04 -0400
Subject: [PATCH 3/4] Update Python client to use 4 decimal precision for
 sudoed admins

create_order now dynamically picks precision (4 for sudo, 2 otherwise)
based on the client's tracked sudo_enabled state.
---
 python-client/src/metagame/trading_client.py | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/python-client/src/metagame/trading_client.py b/python-client/src/metagame/trading_client.py
index e63a7074..a6e6cead 100644
--- a/python-client/src/metagame/trading_client.py
+++ b/python-client/src/metagame/trading_client.py
@@ -64,12 +64,14 @@ def create_order(
         """
         Place an order on the exchange.
         Note that if price and size are passed as float or Decimal they will be quantized.
+        Sudoed admins get 4 decimal places; regular users get 2.
         """
-        price_quantized = round(price, 2)
-        if abs(price_quantized - price) > 1e-4:
+        precision = 4 if self._state.sudo_enabled else 2
+        price_quantized = round(price, precision)
+        if abs(price_quantized - price) > 1e-6:
             logger.warning(f"Price {price} quantized to {price_quantized}")
-        size_quantized = round(size, 2)
-        if abs(size_quantized - size) > 1e-4:
+        size_quantized = round(size, precision)
+        if abs(size_quantized - size) > 1e-6:
             logger.warning(f"Size {size} quantized to {size_quantized}")
         msg = websocket_api.ClientMessage(
             create_order=websocket_api.CreateOrder(

From 59e9768a15a3d8285b093e5ea513df35d1420e84 Mon Sep 17 00:00:00 2001
From: crthpl <theo@reinsberg.info>
Date: Sun, 8 Mar 2026 10:12:22 -0400
Subject: [PATCH 4/4] Fix: apply 4 decimal precision to transfers, not orders

Reverts order precision changes (orders stay at 1 decimal frontend /
2 decimal backend). Instead, sudoed admins now get 4 decimal places
for transfer amounts (backend already allowed this; frontend now
adapts step and rounding when sudo is enabled).
---
 backend/src/db.rs                             | 27 ++-----------------
 backend/src/handle_socket.rs                  |  2 +-
 backend/src/seed.rs                           |  2 +-
 .../lib/components/forms/makeTransfer.svelte  | 16 ++++++-----
 .../src/lib/components/marketDataUtils.ts     | 14 ++++++++++
 .../src/lib/components/marketOrders.svelte    | 16 ++++-------
 python-client/src/metagame/trading_client.py  | 10 +++----
 7 files changed, 37 insertions(+), 50 deletions(-)

diff --git a/backend/src/db.rs b/backend/src/db.rs
index e1f93b28..64e52dd9 100644
--- a/backend/src/db.rs
+++ b/backend/src/db.rs
@@ -2663,7 +2663,6 @@ impl DB {
         &self,
         owner_id: i64,
         create_order: websocket_api::CreateOrder,
-        is_sudo: bool,
     ) -> SqlxResult<ValidationResult<OrderCreated>> {
         let Ok(price) = Decimal::try_from(create_order.price) else {
             return Ok(Err(ValidationFailure::InvalidPrice));
@@ -2682,12 +2681,11 @@ impl DB {
         let price = price.normalize();
         let size = size.normalize();
 
-        let max_scale = if is_sudo { 4 } else { 2 };
-        if price.scale() > max_scale || price.mantissa() > 1_000_000_000_000 {
+        if price.scale() > 2 || price.mantissa() > 1_000_000_000_000 {
             return Ok(Err(ValidationFailure::InvalidPrice));
         }
 
-        if size <= dec!(0) || size.scale() > max_scale || size.mantissa() > 1_000_000_000_000 {
+        if size <= dec!(0) || size.scale() > 2 || size.mantissa() > 1_000_000_000_000 {
             return Ok(Err(ValidationFailure::InvalidSize));
         }
 
@@ -4604,7 +4602,6 @@ mod tests {
                     size: 1.0,
                     side: websocket_api::Side::Bid as i32,
                 },
-            false,
             )
             .await?;
         assert!(matches!(order_status, Err(ValidationFailure::InvalidPrice)));
@@ -4618,7 +4615,6 @@ mod tests {
                     size: 100.0,
                     side: websocket_api::Side::Bid as i32,
                 },
-            false,
             )
             .await?;
         assert!(matches!(
@@ -4635,7 +4631,6 @@ mod tests {
                     size: 100.0,
                     side: websocket_api::Side::Offer as i32,
                 },
-            false,
             )
             .await?;
         assert!(matches!(
@@ -4652,7 +4647,6 @@ mod tests {
                     size: -1.0,
                     side: websocket_api::Side::Bid as i32,
                 },
-            false,
             )
             .await?;
         assert!(matches!(order_status, Err(ValidationFailure::InvalidSize)));
@@ -4666,7 +4660,6 @@ mod tests {
                     size: 1.0,
                     side: websocket_api::Side::Bid as i32,
                 },
-            false,
             )
             .await?;
         assert!(matches!(order_status, Err(ValidationFailure::InvalidPrice)));
@@ -4680,7 +4673,6 @@ mod tests {
                     size: 1.0,
                     side: websocket_api::Side::Offer as i32,
                 },
-            false,
             )
             .await?;
         assert!(order_status.is_ok());
@@ -4704,7 +4696,6 @@ mod tests {
                     size: 1.0,
                     side: websocket_api::Side::Bid as i32,
                 },
-            false,
             )
             .await?;
         let Ok(OrderCreated {
@@ -4780,7 +4771,6 @@ mod tests {
                     size: 1.0,
                     side: websocket_api::Side::Offer as i32,
                 },
-            false,
             )
             .await?;
         assert!(matches!(
@@ -4821,7 +4811,6 @@ mod tests {
                 size: 1.0,
                 side: websocket_api::Side::Bid as i32,
             },
-        false,
         )
         .await?
         .unwrap();
@@ -4834,7 +4823,6 @@ mod tests {
                 size: 1.0,
                 side: websocket_api::Side::Offer as i32,
             },
-        false,
         )
         .await?
         .unwrap();
@@ -4865,7 +4853,6 @@ mod tests {
                     size: 0.5,
                     side: websocket_api::Side::Offer as i32,
                 },
-            false,
             )
             .await?;
 
@@ -4940,7 +4927,6 @@ mod tests {
                 size: 1.0,
                 side: websocket_api::Side::Bid as i32,
             },
-        false,
         )
         .await?
         .unwrap();
@@ -4954,7 +4940,6 @@ mod tests {
                     size: 0.5,
                     side: websocket_api::Side::Offer as i32,
                 },
-            false,
             )
             .await?;
 
@@ -5002,7 +4987,6 @@ mod tests {
                 size: 10.0,
                 side: websocket_api::Side::Bid as i32,
             },
-        false,
         )
         .await?
         .unwrap();
@@ -5016,7 +5000,6 @@ mod tests {
                     size: 15.0,
                     side: websocket_api::Side::Bid as i32,
                 },
-            false,
             )
             .await?;
 
@@ -5033,7 +5016,6 @@ mod tests {
                 size: 10.0,
                 side: websocket_api::Side::Bid as i32,
             },
-        false,
         )
         .await?
         .unwrap();
@@ -5081,7 +5063,6 @@ mod tests {
                 size: 1.0,
                 side: websocket_api::Side::Bid as i32,
             },
-        false,
         )
         .await?
         .unwrap();
@@ -5093,7 +5074,6 @@ mod tests {
                 size: 1.0,
                 side: websocket_api::Side::Bid as i32,
             },
-        false,
         )
         .await?
         .unwrap();
@@ -5105,7 +5085,6 @@ mod tests {
                 size: 1.0,
                 side: websocket_api::Side::Bid as i32,
             },
-        false,
         )
         .await?
         .unwrap();
@@ -5117,7 +5096,6 @@ mod tests {
                 size: 1.0,
                 side: websocket_api::Side::Bid as i32,
             },
-        false,
         )
         .await?
         .unwrap();
@@ -5131,7 +5109,6 @@ mod tests {
                     size: 4.0,
                     side: websocket_api::Side::Offer as i32,
                 },
-            false,
             )
             .await?;
 
diff --git a/backend/src/handle_socket.rs b/backend/src/handle_socket.rs
index c2f3f3b0..d4a9f224 100644
--- a/backend/src/handle_socket.rs
+++ b/backend/src/handle_socket.rs
@@ -663,7 +663,7 @@ async fn handle_client_message(
         }
         CM::CreateOrder(create_order) => {
             check_mutate_rate_limit!("CreateOrder");
-            match db.create_order(acting_as, create_order, admin_id.is_some()).await? {
+            match db.create_order(acting_as, create_order).await? {
                 Ok(order_created) => {
                     for user_id in order_created.fills.iter().map(|fill| &fill.owner_id) {
                         subscriptions.notify_portfolio(*user_id);
diff --git a/backend/src/seed.rs b/backend/src/seed.rs
index c99b1e72..17cc7558 100644
--- a/backend/src/seed.rs
+++ b/backend/src/seed.rs
@@ -289,7 +289,7 @@ pub async fn seed_dev_data(db: &DB, pool: &SqlitePool) -> Result<(), anyhow::Err
             side: order.side.into(),
         };
 
-        match db.create_order(account_id, create_order, false).await? {
+        match db.create_order(account_id, create_order).await? {
             Ok(result) => {
                 let trades_count = result.trades.len();
                 if trades_count > 0 {
diff --git a/frontend/src/lib/components/forms/makeTransfer.svelte b/frontend/src/lib/components/forms/makeTransfer.svelte
index 230955a4..902281a1 100644
--- a/frontend/src/lib/components/forms/makeTransfer.svelte
+++ b/frontend/src/lib/components/forms/makeTransfer.svelte
@@ -9,7 +9,7 @@
 	import { Input } from '$lib/components/ui/input';
 	import * as Popover from '$lib/components/ui/popover';
 	import * as Tooltip from '$lib/components/ui/tooltip';
-	import { roundToTenth } from '$lib/components/marketDataUtils';
+	import { roundToTenth, roundToTenThousandth } from '$lib/components/marketDataUtils';
 	import { cn, formatNumber } from '$lib/utils';
 	import ChevronsUpDown from '@lucide/svelte/icons/chevrons-up-down';
 	import { websocket_api } from 'schema-js';
@@ -17,6 +17,10 @@
 	import type { Snippet } from 'svelte';
 	import { protoSuperForm } from './protoSuperForm';
 
+	const isSudo = $derived(serverState.isAdmin && serverState.sudoEnabled);
+	const transferStep = $derived(isSudo ? '0.0001' : '0.1');
+	const roundTransfer = $derived(isSudo ? roundToTenThousandth : roundToTenth);
+
 	interface Props {
 		children?: Snippet;
 		onclick?: () => void;
@@ -379,13 +383,13 @@
 							<Input
 								{...props}
 								type="number"
-								min="0.1"
+								min={isSudo ? '0.0001' : '0.1'}
 								max={maxAmount}
-								step="0.1"
+								step={transferStep}
 								class="w-32"
 								bind:value={$formData.amount}
 								onblur={() => {
-									$formData.amount = roundToTenth($formData.amount as unknown as number);
+									$formData.amount = roundTransfer($formData.amount as unknown as number);
 								}}
 							/>
 							{#if selectedCount > 1}
@@ -394,7 +398,7 @@
 						</div>
 						<p class="text-sm text-muted-foreground">
 							Total: <span class={exceedsBalance ? 'text-destructive line-through' : ''}
-								>📎 {formatNumber(roundToTenth(totalAmount))}</span
+								>📎 {formatNumber(roundTransfer(totalAmount))}</span
 							>
 						</p>
 						{#if exceedsBalance}
@@ -438,7 +442,7 @@
 							<li>{dest.name}</li>
 						{/each}
 					</ul>
-					Total: 📎 {formatNumber(roundToTenth(confirmAmount * confirmDestinations.length))}
+					Total: 📎 {formatNumber(roundTransfer(confirmAmount * confirmDestinations.length))}
 				{/if}
 			</AlertDialog.Description>
 		</AlertDialog.Header>
diff --git a/frontend/src/lib/components/marketDataUtils.ts b/frontend/src/lib/components/marketDataUtils.ts
index c2e81fa6..9be970b8 100644
--- a/frontend/src/lib/components/marketDataUtils.ts
+++ b/frontend/src/lib/components/marketDataUtils.ts
@@ -237,6 +237,20 @@ export function roundToHundredth<T extends number | string | null | undefined>(
 	return Number(hundredthFormatter.format(numeric));
 }
 
+const tenThousandthFormatter = new Intl.NumberFormat(undefined, {
+	maximumFractionDigits: 4,
+	useGrouping: false
+});
+
+export function roundToTenThousandth<T extends number | string | null | undefined>(
+	value: T
+): T | number {
+	if (value === '' || value === null || value === undefined) return value;
+	const numeric = typeof value === 'number' ? value : Number(value);
+	if (!Number.isFinite(numeric)) return value;
+	return Number(tenThousandthFormatter.format(numeric));
+}
+
 export function roundToWhole<T extends number | string | null | undefined>(value: T): T | number {
 	if (value === '' || value === null || value === undefined) return value;
 	const numeric = typeof value === 'number' ? value : Number(value);
diff --git a/frontend/src/lib/components/marketOrders.svelte b/frontend/src/lib/components/marketOrders.svelte
index 2acfaee5..8e38c5f6 100644
--- a/frontend/src/lib/components/marketOrders.svelte
+++ b/frontend/src/lib/components/marketOrders.svelte
@@ -129,13 +129,10 @@
 		localStorage.setItem(zapLimitsKey, JSON.stringify(limits));
 	});
 
-	const isSudo = $derived(serverState.isAdmin && serverState.sudoEnabled);
-	const maxDecimals = $derived(isSudo ? 4 : 1);
-
-	function tooManyDecimals(value: string | number): boolean {
+	function hasMoreThanOneDecimal(value: string | number): boolean {
 		const str = String(value);
 		const match = str.match(/\.(\d+)/);
-		return match ? match[1].length > maxDecimals : false;
+		return match ? match[1].length > 1 : false;
 	}
 
 	function validatePrice(
@@ -146,8 +143,7 @@
 		if (value === '' || value === null || value === undefined) return 'Price is required';
 		const num = Number(value);
 		if (!Number.isFinite(num)) return 'Invalid number';
-		if (tooManyDecimals(value))
-			return `Max ${maxDecimals} decimal place${maxDecimals > 1 ? 's' : ''}`;
+		if (hasMoreThanOneDecimal(value)) return 'Max 1 decimal place';
 		if (min != null && num < min) return `Min price is ${min}`;
 		if (max != null && num > max) return `Max price is ${max}`;
 		return '';
@@ -157,8 +153,7 @@
 		if (value === '' || value === null || value === undefined) return 'Size is required';
 		const num = Number(value);
 		if (!Number.isFinite(num)) return 'Invalid number';
-		if (tooManyDecimals(value))
-			return `Max ${maxDecimals} decimal place${maxDecimals > 1 ? 's' : ''}`;
+		if (hasMoreThanOneDecimal(value)) return 'Max 1 decimal place';
 		if (num <= 0) return 'Size must be positive';
 		return '';
 	}
@@ -273,8 +268,7 @@
 	function limitDecimals(e: Event) {
 		const input = e.target as HTMLInputElement;
 		const value = input.value;
-		const pattern = new RegExp(`^(-?\\d*\\.?\\d{0,${maxDecimals}})`);
-		const match = value.match(pattern);
+		const match = value.match(/^(-?\d*\.?\d?)/);
 		if (match && match[1] !== value) {
 			input.value = match[1];
 			// Trigger reactive update
diff --git a/python-client/src/metagame/trading_client.py b/python-client/src/metagame/trading_client.py
index a6e6cead..e63a7074 100644
--- a/python-client/src/metagame/trading_client.py
+++ b/python-client/src/metagame/trading_client.py
@@ -64,14 +64,12 @@ def create_order(
         """
         Place an order on the exchange.
         Note that if price and size are passed as float or Decimal they will be quantized.
-        Sudoed admins get 4 decimal places; regular users get 2.
         """
-        precision = 4 if self._state.sudo_enabled else 2
-        price_quantized = round(price, precision)
-        if abs(price_quantized - price) > 1e-6:
+        price_quantized = round(price, 2)
+        if abs(price_quantized - price) > 1e-4:
             logger.warning(f"Price {price} quantized to {price_quantized}")
-        size_quantized = round(size, precision)
-        if abs(size_quantized - size) > 1e-6:
+        size_quantized = round(size, 2)
+        if abs(size_quantized - size) > 1e-4:
             logger.warning(f"Size {size} quantized to {size_quantized}")
         msg = websocket_api.ClientMessage(
             create_order=websocket_api.CreateOrder(