#!/usr/bin/env bash
# List all WETH9 holders and their balances on Chain 138 (Blockscout API).
# Usage: ./scripts/weth9-list-holders.sh

set -euo pipefail

BLOCKSCOUT_API="${BLOCKSCOUT_API:-https://explorer.d-bis.org/api}"
WETH9="0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2"
PAGE_SIZE=100

echo "=== WETH9 holders (Chain 138) ==="
echo "WETH9: $WETH9"
echo "API: $BLOCKSCOUT_API"
echo ""

PAGE=1
TOTAL=0
while true; do
    URL="${BLOCKSCOUT_API}/v2/tokens/${WETH9}/holders?page=${PAGE}&page_size=${PAGE_SIZE}"
    RESP=$(curl -sS --connect-timeout 10 "$URL" 2>/dev/null || echo '{"items":[]}')
    N=$(echo "$RESP" | jq -r '(.items | length) // (.data | length) // 0' 2>/dev/null || echo "0")
    [[ -z "$N" || "$N" -eq 0 ]] && break
    for i in $(seq 0 $((N - 1))); do
        ITEM=$(echo "$RESP" | jq -c "(.items[$i] // .data[$i]) // {}")
        ADDR=$(echo "$ITEM" | jq -r '.address.hash // .address // .holder_address // empty')
        VAL=$(echo "$ITEM" | jq -r '.value // .balance // "0"')
        [[ -z "$ADDR" || "$ADDR" == "null" ]] && continue
        if command -v cast &>/dev/null; then
            ETH=$(cast from-wei "$VAL" ether 2>/dev/null || echo "$VAL")
        else
            ETH="$VAL"
        fi
        echo "$ADDR $VAL ($ETH WETH9)"
        ((TOTAL++)) || true
    done
    [[ "$N" -lt $PAGE_SIZE ]] && break
    ((PAGE++)) || true
done

echo ""
echo "Total holders: $TOTAL"
echo "To burn from an address you control: WETH9.withdraw(balance) with that key."