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feat: ft holder indexing (#2030)
* feat: stx holder indexing * feat: ft holder indexing * feat: include total supply in response * chore: cleanup debug code * chore: update ft holders endpoint
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‎docs/api/tokens/get-ft-holders.example.json‎

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{
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"limit": 100,
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"offset": 0,
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"total": 3,
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"total_supply": "11700",
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"results": [
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{
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"address": "SP3Y2ZSH8P7D50B0VBTSX11S7XSG24M1VB9YFQA2K",
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"balance": "10000"
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},
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{
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"address": "SP3WJYXJZ4QK2V5V9VX2VXVZ6VXVZ6V2V5V2V2V2V",
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"balance": "900"
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},
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{
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"address": "SP3WJYXJZ4QK2V5V9VX2VXVZ6VXVZ6V2V5V2V2V2V",
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"balance": "800"
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}
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]
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}

‎docs/api/tokens/get-ft-holders.schema.json‎

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{
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"description": "List of Fungible Token holders",
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"title": "FungibleTokenHolderList",
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"type": "object",
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"required": [
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"total_supply",
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"results",
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"limit",
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"offset",
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"total"
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],
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"additionalProperties": false,
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"properties": {
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"limit": {
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"type": "integer",
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"maximum": 200,
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"description": "The number of holders to return"
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},
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"offset": {
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"type": "integer",
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"description": "The number to holders to skip (starting at `0`)"
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},
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"total": {
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"type": "integer",
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"description": "The number of holders available"
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},
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"total_supply": {
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"type": "string",
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"description": "The total supply of the token (the sum of all balances)"
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},
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"results": {
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"type": "array",
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"items": {
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"$ref": "../../entities/tokens/ft-holder-entry.schema.json"
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}
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}
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}
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}

‎docs/entities/tokens/ft-holder-entry.schema.json‎

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{
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"type": "object",
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"title": "FtHolderEntry",
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"required": ["address", "balance"],
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"additionalProperties": false,
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"properties": {
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"address": {
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"type": "string"
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},
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"balance": {
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"type": "string"
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}
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}
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}

‎docs/generated.d.ts‎

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@@ -103,6 +103,7 @@ export type SchemaMergeRootStub =
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| PoxCycleSignerStackersListResponse
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| PoxCycleSignersListResponse
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| PoxCycleListResponse
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| FungibleTokenHolderList
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| {
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[k: string]: unknown | undefined;
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}
@@ -193,6 +194,7 @@ export type SchemaMergeRootStub =
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| PoxCycle
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| PoxSigner
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| PoxStacker
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| FtHolderEntry
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| NonFungibleTokenHistoryEventWithTxId
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| NonFungibleTokenHistoryEventWithTxMetadata
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| NonFungibleTokenHistoryEvent
@@ -3437,6 +3439,32 @@ export interface PoxCycle {
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total_stacked_amount: string;
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total_signers: number;
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}
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/**
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* List of Fungible Token holders
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*/
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export interface FungibleTokenHolderList {
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/**
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* The number of holders to return
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*/
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limit: number;
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/**
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* The number to holders to skip (starting at `0`)
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*/
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offset: number;
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/**
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* The number of holders available
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*/
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total: number;
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/**
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* The total supply of the token (the sum of all balances)
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*/
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total_supply: string;
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results: FtHolderEntry[];
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}
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export interface FtHolderEntry {
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address: string;
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balance: string;
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}
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/**
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* List of Non-Fungible Token history events
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*/

‎docs/openapi.yaml‎

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value:
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$ref: ./api/tokens/get-non-fungible-token-mints-tx-metadata.example.schema.json
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/extended/v1/tokens/ft/{token}/holders:
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get:
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operationId: get_ft_holders
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summary: Fungible token holders
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description: |
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Retrieves the list of Fungible Token holders for a given token ID. Specify `stx` for the `token` parameter to get the list of STX holders.
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tags:
3688+
- Fungible Tokens
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parameters:
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- name: token
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in: path
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description: fungible token identifier
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required: true
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schema:
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type: string
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examples:
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stx:
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value: stx
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summary: STX token
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ft:
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value: SP3Y2ZSH8P7D50B0VBTSX11S7XSG24M1VB9YFQA4K.token-aeusdc::aeUSDC
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summary: fungible token
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responses:
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200:
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description: Fungible Token holders
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content:
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application/json:
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schema:
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$ref: ./api/tokens/get-ft-holders.schema.json
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example:
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$ref: ./api/tokens/get-ft-holders.example.json
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/extended/v1/fee_rate:
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post:
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operationId: fetch_fee_rate

‎migrations/1720532894811_ft_balances.js‎

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/** @param { import("node-pg-migrate").MigrationBuilder } pgm */
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exports.up = pgm => {
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pgm.createTable('ft_balances', {
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id: {
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type: 'bigserial',
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primaryKey: true,
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},
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address: {
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type: 'text',
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notNull: true,
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},
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token: {
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type: 'text',
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notNull: true,
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},
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balance: {
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type: 'numeric',
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notNull: true,
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}
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});
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pgm.addConstraint('ft_balances', 'unique_address_token', `UNIQUE(address, token)`);
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// Speeds up "grab the addresses with the highest balance for a given token" queries
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pgm.createIndex('ft_balances', [{ name: 'token' }, { name: 'balance', sort: 'DESC' }]);
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// Speeds up "get the total supply of a given token" queries
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pgm.createIndex('ft_balances', 'token');
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30+
// Populate the table with the current stx balances
31+
pgm.sql(`
32+
WITH all_balances AS (
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SELECT sender AS address, -SUM(amount) AS balance_change
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FROM stx_events
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WHERE asset_event_type_id IN (1, 3) -- Transfers and Burns affect the sender's balance
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AND canonical = true AND microblock_canonical = true
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GROUP BY sender
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UNION ALL
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SELECT recipient AS address, SUM(amount) AS balance_change
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FROM stx_events
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WHERE asset_event_type_id IN (1, 2) -- Transfers and Mints affect the recipient's balance
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AND canonical = true AND microblock_canonical = true
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GROUP BY recipient
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),
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net_balances AS (
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SELECT address, SUM(balance_change) AS balance
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FROM all_balances
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GROUP BY address
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),
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fees AS (
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SELECT address, SUM(total_fees) AS total_fees
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FROM (
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SELECT sender_address AS address, SUM(fee_rate) AS total_fees
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FROM txs
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WHERE canonical = true AND microblock_canonical = true AND sponsored = false
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GROUP BY sender_address
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UNION ALL
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SELECT sponsor_address AS address, SUM(fee_rate) AS total_fees
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FROM txs
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WHERE canonical = true AND microblock_canonical = true AND sponsored = true
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GROUP BY sponsor_address
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) AS subquery
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GROUP BY address
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),
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rewards AS (
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SELECT
67+
recipient AS address,
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SUM(
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coinbase_amount + tx_fees_anchored + tx_fees_streamed_confirmed + tx_fees_streamed_produced
70+
) AS total_rewards
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FROM miner_rewards
72+
WHERE canonical = true
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GROUP BY recipient
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),
75+
all_addresses AS (
76+
SELECT address FROM net_balances
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UNION
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SELECT address FROM fees
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UNION
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SELECT address FROM rewards
81+
)
82+
INSERT INTO ft_balances (address, balance, token)
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SELECT
84+
aa.address,
85+
COALESCE(nb.balance, 0) - COALESCE(f.total_fees, 0) + COALESCE(r.total_rewards, 0) AS balance,
86+
'stx' AS token
87+
FROM all_addresses aa
88+
LEFT JOIN net_balances nb ON aa.address = nb.address
89+
LEFT JOIN fees f ON aa.address = f.address
90+
LEFT JOIN rewards r ON aa.address = r.address
91+
`);
92+
93+
// Populate the table with the current FT balances
94+
pgm.sql(`
95+
WITH all_balances AS (
96+
SELECT sender AS address, asset_identifier, -SUM(amount) AS balance_change
97+
FROM ft_events
98+
WHERE asset_event_type_id IN (1, 3) -- Transfers and Burns affect the sender's balance
99+
AND canonical = true
100+
AND microblock_canonical = true
101+
GROUP BY sender, asset_identifier
102+
UNION ALL
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SELECT recipient AS address, asset_identifier, SUM(amount) AS balance_change
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FROM ft_events
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WHERE asset_event_type_id IN (1, 2) -- Transfers and Mints affect the recipient's balance
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AND canonical = true
107+
AND microblock_canonical = true
108+
GROUP BY recipient, asset_identifier
109+
),
110+
net_balances AS (
111+
SELECT address, asset_identifier, SUM(balance_change) AS balance
112+
FROM all_balances
113+
GROUP BY address, asset_identifier
114+
)
115+
INSERT INTO ft_balances (address, balance, token)
116+
SELECT address, balance, asset_identifier AS token
117+
FROM net_balances
118+
`);
119+
120+
};
121+
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/** @param { import("node-pg-migrate").MigrationBuilder } pgm */
123+
exports.down = pgm => {
124+
pgm.dropTable('ft_balances');
125+
};

‎src/api/pagination.ts‎

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@@ -38,6 +38,7 @@ export enum ResourceType {
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BurnBlock,
3939
Signer,
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PoxCycle,
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TokenHolders,
4142
}
4243

4344
export const pagingQueryLimits: Record<ResourceType, { defaultLimit: number; maxLimit: number }> = {
@@ -89,6 +90,10 @@ export const pagingQueryLimits: Record<ResourceType, { defaultLimit: number; max
8990
defaultLimit: 20,
9091
maxLimit: 60,
9192
},
93+
[ResourceType.TokenHolders]: {
94+
defaultLimit: 100,
95+
maxLimit: 200,
96+
},
9297
};
9398

9499
export function getPagingQueryLimit(

‎src/api/routes/tokens.ts‎

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import { asyncHandler } from '../async-handler';
22
import * as express from 'express';
33
import {
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FungibleTokenHolderList,
45
NonFungibleTokenHistoryEvent,
56
NonFungibleTokenHistoryEventList,
67
NonFungibleTokenHolding,
@@ -228,5 +229,25 @@ export function createTokenRouter(db: PgStore): express.Router {
228229
})
229230
);
230231

232+
router.get(
233+
'/ft/:token/holders',
234+
cacheHandler,
235+
asyncHandler(async (req, res) => {
236+
const token = req.params.token;
237+
const limit = getPagingQueryLimit(ResourceType.TokenHolders, req.query.limit);
238+
const offset = parsePagingQueryInput(req.query.offset ?? 0);
239+
const { results, total, totalSupply } = await db.getTokenHolders({ token, limit, offset });
240+
const response: FungibleTokenHolderList = {
241+
limit: limit,
242+
offset: offset,
243+
total: total,
244+
total_supply: totalSupply,
245+
results: results,
246+
};
247+
setETagCacheHeaders(res);
248+
res.status(200).json(response);
249+
})
250+
);
251+
231252
return router;
232253
}

‎src/datastore/pg-store.ts‎

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32883288
return { found: true, result: queryResult };
32893289
}
32903290

3291+
async getTokenHolders(args: { token: string; limit: number; offset: number }): Promise<{
3292+
results: { address: string; balance: string }[];
3293+
totalSupply: string;
3294+
total: number;
3295+
}> {
3296+
const holderResults = await this.sql<
3297+
{ address: string; balance: string; count: number; total_supply: string }[]
3298+
>`
3299+
WITH totals AS (
3300+
SELECT
3301+
SUM(balance) AS total,
3302+
COUNT(*)::int AS total_count
3303+
FROM ft_balances
3304+
WHERE token = ${args.token}
3305+
)
3306+
SELECT
3307+
fb.address,
3308+
fb.balance,
3309+
ts.total AS total_supply,
3310+
ts.total_count AS count
3311+
FROM ft_balances fb
3312+
JOIN totals ts ON true
3313+
WHERE token = ${args.token}
3314+
ORDER BY balance DESC
3315+
LIMIT ${args.limit}
3316+
OFFSET ${args.offset}
3317+
`;
3318+
const results = holderResults.map(row => ({ address: row.address, balance: row.balance }));
3319+
const total = holderResults.length > 0 ? holderResults[0].count : 0;
3320+
const totalSupply = holderResults.length > 0 ? holderResults[0].total_supply : '0';
3321+
return { results, totalSupply, total };
3322+
}
3323+
32913324
/**
32923325
* Returns a list of NFTs owned by the given principal filtered by optional `asset_identifiers`,
32933326
* including optional transaction metadata.

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