eth-indexer/internal/handler/faucet_give.go

package handler

import (
	"context"
	"math/big"

	"github.com/grassrootseconomics/eth-tracker/pkg/event"
	"github.com/lmittmann/w3"
	"github.com/lmittmann/w3/module/eth"
)

const balanceThreshold = 5

func (h *Handler) IndexFaucetGive(ctx context.Context, event event.Event) error {
	return h.store.InsertFaucetGive(ctx, event)
}

func (h *Handler) FaucetHealthCheck(ctx context.Context, event event.Event) error {
	var balance *big.Int

	if err := h.chainProvider.Client.CallCtx(
		ctx,
		eth.Balance(w3.A(event.ContractAddress), nil).Returns(&balance),
	); err != nil {
		return err
	}

	if balance.Cmp(new(big.Int).Mul(w3.BigEther, big.NewInt(balanceThreshold))) < 0 {
		h.logg.Warn("faucet balance is less than 5 ether", "faucet", event.ContractAddress)
	}

	return nil
}