tezos.token_transfers index

spec_version: 3.0
package: demo_tezos_token_transfers

contracts:
  tzbtc_mainnet:
    kind: tezos
    address: KT1PWx2mnDueood7fEmfbBDKx1D9BAnnXitn
    typename: tzbtc

datasources:
  tzkt:
    kind: tezos.tzkt
    url: https://api.tzkt.io

indexes:
  tzbtc_holders_mainnet:
    kind: tezos.token_transfers
    datasources:
      - tzkt
    handlers:
      - callback: on_token_transfer
        contract: tzbtc_mainnet

from decimal import Decimal
from decimal import InvalidOperation

from demo_tezos_token_transfers.handlers.on_balance_update import on_balance_update
from dipdup.context import HandlerContext
from dipdup.models.tezos import TezosTokenTransferData


async def on_token_transfer(
    ctx: HandlerContext,
    token_transfer: TezosTokenTransferData,
) -> None:
    from_, to = token_transfer.from_address, token_transfer.to_address
    if not from_ or not to or from_ == to:
        return
    try:
        amount = Decimal(token_transfer.amount or 0) / (10**8)
    except InvalidOperation:
        return
    if not amount:
        return

    await on_balance_update(address=from_, balance_update=-amount, timestamp=token_transfer.timestamp)
    await on_balance_update(address=to, balance_update=amount, timestamp=token_transfer.timestamp)