logos-blockchain · 0x-r4bbit · Sep 8, 2026
diff --git a/apps/amm/README.md b/apps/amm/README.md
@@ -215,16 +215,16 @@ wallet/runbook display them) or hex — the app normalizes both to hex.
 
 The Pools view is config-driven the same way: it reads a flat JSON list from the
 `AMM_POOLS_CONFIG` environment variable (absolute path) and renders one row per
-entry. `tokenA`/`tokenB` are the display symbols and `feeBps` the fee tier;
+entry. `tokenA`/`tokenB` are the display symbols;
 `poolId`/`tokenADefinitionId`/`tokenBDefinitionId` identify the pool on-chain.
-Adding more pairs is purely a config edit — no app change:
+The swap fee is not a pool field — it is instance-wide (`AmmConfig.swapFeeBps`),
+read from the config. Adding more pairs is purely a config edit — no app change:
 
 ```json
 [
   {
     "tokenA": "TKA",
     "tokenB": "TKB",
-    "feeBps": 1,
     "poolId": "9qbX…",
     "tokenADefinitionId": "4T69…",
     "tokenBDefinitionId": "7Zc2…"
@@ -239,9 +239,9 @@ cp apps/amm/amm-pools.json.example apps/amm/amm-pools.json   # then replace the
 ```
 
 If `AMM_POOLS_CONFIG` is unset, unreadable, or not a valid JSON array, the Pools
-list shows its empty state. Entries missing `tokenA`, `tokenB`, or a numeric
-`feeBps` are skipped individually. The AMM testnet setup script writes this file
-for the pool(s) it seeds (see below).
+list shows its empty state. Entries missing `tokenA` or `tokenB` are skipped
+individually. The AMM testnet setup script writes this file for the pool(s) it
+seeds (see below).
 
 The **Pool** tab in the nav bar is a dropdown with two entries. *Create pool*
 opens the new-position / add-liquidity form. *View positions* lists the wallet's
@@ -250,7 +250,7 @@ definition id cannot be reversed back to its pool, so the app resolves every
 pool in this config and matches each pool's `lpDefinitionId` against the
 wallet's token holdings. A pool that is not in the config therefore cannot
 appear, however many LP tokens the wallet holds for it. Each row shows the pair,
-fee tier, the wallet's claim on both reserves (`reserve × lpBalance / lpSupply`,
+the instance swap fee, the wallet's claim on both reserves (`reserve × lpBalance / lpSupply`,
 floored like the program's own payout), and its share of the pool. The list
 needs an open wallet.
 
@@ -265,7 +265,7 @@ holds two LP accounts for one pool; a burn names a single account, so the sheet
 draws on the largest and says so when the position spans more than one.
 
 Clicking a row in the Pools list opens the pool detail view, which reads the live pool through
-`resolvePoolAccount` and shows the reserve split, spot price, fee tier, LP
+`resolvePoolAccount` and shows the reserve split, spot price, the instance swap fee, LP
 supply, an estimate of the fees accrued into the reserves, and the pool's
 account ids. Its **Swap** and **Add liquidity** buttons switch tabs with the
 pair preselected. Both the detail view and the preselection need

diff --git a/apps/amm/VALIDATION.md b/apps/amm/VALIDATION.md
@@ -40,8 +40,8 @@ transaction ID is displayed.
 ## Acceptance Checklist
 
 - Context exposes Wallet-Scoped Holdings and configured token definitions.
-- Unsupported fee tiers are disabled and explain why.
-- Active pool fee tier is fixed to the stored pool fee.
+- No fee selection in the form — the swap fee is instance-wide (set at
+  `initialize`, stored in the AMM config) and applies to every pool.
 - Missing pool flow accepts an editable `X Token A = Y Token B` ratio and
   scales either deposit from the minimum that mints more than
   `MINIMUM_LIQUIDITY`.

diff --git a/apps/amm/amm-pools.json.example b/apps/amm/amm-pools.json.example
@@ -2,7 +2,6 @@
   {
     "tokenA": "TKA",
     "tokenB": "TKB",
-    "feeBps": 1,
     "poolId": "REPLACE_WITH_POOL_PDA",
     "tokenADefinitionId": "REPLACE_WITH_TOKEN_A_DEFINITION_ID",
     "tokenBDefinitionId": "REPLACE_WITH_TOKEN_B_DEFINITION_ID"

diff --git a/apps/amm/qml/components/liquidity/LiquidityConfirmationSummary.qml b/apps/amm/qml/components/liquidity/LiquidityConfirmationSummary.qml
@@ -24,12 +24,6 @@ ColumnLayout {
         value: root.actionText()
     }
 
-    SummaryRow {
-        Layout.fillWidth: true
-        label: qsTr("Fee")
-        value: root.snapshot.feeText || "-"
-    }
-
     SummaryRow {
         Layout.fillWidth: true
         label: qsTr("Deposit")

diff --git a/apps/amm/qml/components/liquidity/NewPositionForm.qml b/apps/amm/qml/components/liquidity/NewPositionForm.qml
@@ -38,7 +38,6 @@ AmmActionCard {
                                              ? String(root.activePoolQuote.lpDefinitionId || "") : ""
     property string selectedTokenAId: ""
     property string selectedTokenBId: ""
-    property int selectedFeeBps: 30
     property int slippageBps: 50
     property string amountA: ""
     property string amountB: ""
@@ -85,13 +84,6 @@ AmmActionCard {
     // Whether the wallet session is ready (from the flow); gates funding/selection like the
     // old context "ready"/"no_wallet" status did, minus the network envelope.
     property bool walletReady: false
-    // Supported fee tiers as raw bps, injected from backend.feeTiers() (amm_core's
-    // SUPPORTED_FEE_TIERS). The selector's delegate wants { feeBps } rows, so wrap
-    // each int; labels are derived locally via feeLabel().
-    property var feeTiers: []
-    readonly property var feeTierModel: (root.feeTiers || []).map(function(bps) {
-        return { "feeBps": Number(bps) }
-    })
     readonly property var tokenA: root.tokenById(root.selectedTokenAId)
     readonly property var tokenB: root.tokenById(root.selectedTokenBId)
     readonly property int decimalsA: 0
@@ -111,7 +103,6 @@ AmmActionCard {
     // undefined ⇒ not resolved yet (neither branch shown).
     readonly property bool activePool: root.flowState.poolExists === true
     readonly property bool missingPool: root.flowState.poolExists === false
-    readonly property int poolFeeBps: root.knownPoolFeeBps()
     readonly property bool compact: root.width < 420
     readonly property bool hasPair: root.selectedTokenAId.length > 0
                                     && root.selectedTokenBId.length > 0
@@ -388,87 +379,6 @@ AmmActionCard {
             color: root.theme.colors.divider
         }
 
-        ColumnLayout {
-            Layout.fillWidth: true
-            spacing: 8
-            visible: !root.contextLoading
-
-            Text {
-                text: qsTr("Fee tier")
-                color: root.theme.colors.textPrimary
-                font.pixelSize: 13
-                font.weight: Font.Medium
-            }
-
-            GridLayout {
-                Layout.fillWidth: true
-                columns: root.compact ? 2 : 4
-                columnSpacing: 8
-                rowSpacing: 8
-
-                Repeater {
-                    model: root.feeTierModel
-
-                    Item {
-                        id: feeTierOption
-
-                        required property var modelData
-                        readonly property string disabledReason: root.feeDisabledReason(modelData)
-                        readonly property bool invalid: root.fieldHasError("feeBps")
-                                                        && feeTierButton.checked
-                        Layout.fillWidth: true
-                        implicitHeight: 40
-
-                        Button {
-                            id: feeTierButton
-
-                            anchors.fill: parent
-                            text: parent.modelData.label || root.feeLabel(parent.modelData.feeBps)
-                            checkable: true
-                            checked: root.selectedFeeBps === parent.modelData.feeBps
-                            enabled: parent.disabledReason.length === 0 && !root.submitting
-                            onClicked: root.selectFee(parent.modelData.feeBps)
-
-                            contentItem: Text {
-                                text: feeTierButton.text
-                                color: feeTierButton.enabled
-                                       ? root.theme.colors.textPrimary
-                                       : root.theme.colors.textPlaceholder
-                                font.pixelSize: 12
-                                font.weight: Font.Medium
-                                horizontalAlignment: Text.AlignHCenter
-                                verticalAlignment: Text.AlignVCenter
-                            }
-
-                            background: Rectangle {
-                                radius: 6
-                                color: feeTierButton.checked
-                                       ? root.theme.colors.selection
-                                       : root.theme.colors.inputBg
-                                border.color: feeTierOption.invalid
-                                              ? root.theme.colors.error
-                                              : feeTierButton.checked
-                                                ? root.theme.colors.ctaBg
-                                                : root.theme.colors.borderStrong
-                                border.width: 1
-                            }
-                        }
-
-                        MouseArea {
-                            id: disabledFeeHover
-                            anchors.fill: parent
-                            enabled: parent.disabledReason.length > 0
-                            hoverEnabled: true
-                            acceptedButtons: Qt.NoButton
-                        }
-
-                        ToolTip.visible: disabledFeeHover.containsMouse
-                        ToolTip.text: disabledReason
-                    }
-                }
-            }
-        }
-
         RowLayout {
             Layout.fillWidth: true
             spacing: 10
@@ -851,7 +761,6 @@ AmmActionCard {
     function resetAll() {
         root.selectedTokenAId = ""
         root.selectedTokenBId = ""
-        root.selectedFeeBps = 30
         root.slippageBps = 50
         root.resolvingTokenId = ""
         root.resolvingTokenSide = ""
@@ -896,30 +805,6 @@ AmmActionCard {
         }
     }
 
-    function knownPoolFeeBps() {
-        var direct = root.feeBpsFromQuote(root.quotePayload)
-        if (direct > 0)
-            return direct
-        if (root.quoteMatchesSelectedPair(root.activePoolQuote))
-            return Number(root.activePoolQuote.poolFeeBps || 0)
-        return 0
-    }
-
-    function feeBpsFromQuote(quote) {
-        if (!root.quoteMatchesSelectedPair(quote))
-            return 0
-        var direct = Number(quote.poolFeeBps || 0)
-        if (direct > 0)
-            return direct
-        var errors = quote.errors || []
-        for (var i = 0; i < errors.length; ++i) {
-            var value = Number(errors[i].details ? errors[i].details.poolFeeBps : 0)
-            if (value > 0)
-                return value
-        }
-        return 0
-    }
-
     function quoteMatchesPair() {
         return root.quoteMatchesSelectedPair(root.quotePayload)
     }
@@ -932,33 +817,6 @@ AmmActionCard {
                     || (tokenAId === root.selectedTokenBId && tokenBId === root.selectedTokenAId))
     }
 
-    function selectFee(feeBps) {
-        root.selectedFeeBps = feeBps
-        root.noteDraftChanged()
-        root.requestQuote(true)
-    }
-
-    function feeDisabledReason(tier) {
-        if (tier.enabled === false)
-            return tier.disabledReason || qsTr("This fee tier is unavailable.")
-        if (root.poolFeeBps > 0 && Number(tier.feeBps) !== root.poolFeeBps)
-            return qsTr("Existing pool uses %1. Fee tier is fixed for this pair.")
-                    .arg(root.feeLabel(root.poolFeeBps))
-        return ""
-    }
-
-    function feeLabel(feeBps) {
-        if (feeBps === 1)
-            return "0.01%"
-        if (feeBps === 5)
-            return "0.05%"
-        if (feeBps === 30)
-            return "0.30%"
-        if (feeBps === 100)
-            return "1.00%"
-        return root.formatBps(feeBps)
-    }
-
     function buildQuoteRequest() {
         var errors = []
         if (!root.hasPair) {
@@ -1063,8 +921,7 @@ AmmActionCard {
             "tokenAId": root.displayIsCanonical
                         ? root.selectedTokenAId : root.selectedTokenBId,
             "tokenBId": root.displayIsCanonical
-                        ? root.selectedTokenBId : root.selectedTokenAId,
-            "feeBps": root.selectedFeeBps
+                        ? root.selectedTokenBId : root.selectedTokenAId
         }
     }
 
@@ -1205,7 +1062,6 @@ AmmActionCard {
             "deposit_ratio_mismatch": qsTr("Deposit amounts must match the initial price."),
             "minimum_lp_zero": qsTr("Slippage leaves no minimum LP output."),
             "invalid_slippage": qsTr("Slippage must be between 0% and 50%."),
-            "fee_tier_mismatch": qsTr("Select the existing pool fee tier."),
             "no_wallet": qsTr("Connect a wallet to submit this position."),
             "wallet_unavailable": qsTr("Wallet is unavailable."),
             "wallet_submission_failed": qsTr("Wallet submission failed. Review and retry manually."),
@@ -1327,16 +1183,6 @@ AmmActionCard {
     function applyQuoteSideEffects() {
         if (root.quoteStale)
             return
-        if (root.poolFeeBps > 0 && root.selectedFeeBps !== root.poolFeeBps) {
-            root.selectedFeeBps = root.poolFeeBps
-            root.localErrors = []
-            root.quoteRequested(true, {
-                "ok": true,
-                "errors": [],
-                "request": root.poolProbeRequest(root.pairRequest())
-            })
-            return
-        }
 
         if (root.quotePayload.status !== "ok")
             return
@@ -1455,7 +1301,6 @@ AmmActionCard {
             // taken from the active-pool quote; ignored by the create path.
             "minLp": String(root.quotePayload.minimumLp || ""),
             "pairText": qsTr("%1 / %2").arg(root.shortTokenName(root.tokenA)).arg(root.shortTokenName(root.tokenB)),
-            "feeText": root.feeLabel(root.selectedFeeBps),
             "depositAText": root.quoteAmount("actualAmountA", "actualAmountB", "A"),
             "depositBText": root.quoteAmount("actualAmountA", "actualAmountB", "B"),
             "expectedLpText": root.rawLpText(root.quotePayload.expectedLp),

diff --git a/apps/amm/qml/pages/LiquidityPage.qml b/apps/amm/qml/pages/LiquidityPage.qml
@@ -23,11 +23,6 @@ Item {
     // account selectors; refetched when the wallet opens.
     property var holdings: []
 
-    // The AMM's supported fee tiers (backend.feeTiers()) feeding the fee selector.
-    // Program-derived and wallet-independent, so it's fetched once when the backend
-    // becomes available.
-    property var feeTiers: []
-
     // The liquidity token selector rows (backend.resolveTokens()): the app-owned union of
     // configured tokens and persisted-custom tokens. Refetched when the wallet opens/closes
     // (holdingId/balance change) and after a custom token is added.
@@ -96,14 +91,6 @@ Item {
             function(err) { console.warn("tokenHoldings error:", err) })
     }
 
-    function refreshFeeTiers() {
-        if (!root.backend || root.runtime === null || root.feeTiers.length > 0)
-            return
-        root.runtime.watch(root.backend.feeTiers(),
-            function(list) { root.feeTiers = list },
-            function(err) { console.warn("feeTiers error:", err) })
-    }
-
     function refreshTokens() {
         if (!root.backend || root.runtime === null)
             return
@@ -149,9 +136,9 @@ Item {
             })
     }
 
-onBackendChanged: { root.refreshHoldings(); root.refreshFeeTiers(); root.refreshTokens() }
-    onRuntimeChanged: { root.refreshHoldings(); root.refreshFeeTiers(); root.refreshTokens() }
-    Component.onCompleted: { root.refreshHoldings(); root.refreshFeeTiers(); root.refreshTokens() }
+onBackendChanged: { root.refreshHoldings(); root.refreshTokens() }
+    onRuntimeChanged: { root.refreshHoldings(); root.refreshTokens() }
+    Component.onCompleted: { root.refreshHoldings(); root.refreshTokens() }
 
     Connections {
         target: root.backend
@@ -356,10 +343,9 @@ onBackendChanged: { root.refreshHoldings(); root.refreshFeeTiers(); root.refresh
                     headingText: form.hasPair ? qsTr("Deposit tokens") : qsTr("Select pair")
                     headingDetail: form.hasPair
                                    ? qsTr("Specify the token amounts for your liquidity contribution.")
-                                   : qsTr("Choose two tokens and a fee tier for this position.")
+                                   : qsTr("Choose two tokens for this position.")
                     showRefreshAction: false
                     holdings: root.holdings
-                    feeTiers: root.feeTiers
                     tokens: root.resolvedTokens
                     loadingTokens: root.tokensLoading
                     walletReady: newPositionFlow.walletStateReady