Handling Bitcoin data

import { bitcoinQuery } from '@subsquid/pipes/bitcoin'

export const taprootSpends = bitcoinQuery()
  .addFields({
    block: { number: true, timestamp: true },
    transaction: { transactionIndex: true, txid: true },
    input: {
      transactionIndex: true,
      inputIndex: true,
      prevoutValue: true,
      prevoutScriptPubKeyAddress: true,
      prevoutScriptPubKeyType: true,
    },
  })
  .addInputRequest({
    range: { from: 880_000, to: 880_000 },
    request: {
      prevoutScriptPubKeyType: ['witness_v1_taproot'],
      transaction: true,
    },
  })
  .build()
  .pipe((blocks) =>
    blocks.flatMap((block) => {
      const transactions = new Map(
        block.transactions.map((tx) => [tx.transactionIndex, tx]),
      )

      return block.inputs.map((input) => ({
        block: block.header.number,
        spendingTxid: transactions.get(input.transactionIndex)?.txid,
        inputIndex: input.inputIndex,
        spentAddress: input.prevoutScriptPubKeyAddress,
        spentValueBtc: input.prevoutValue,
      }))
    }),
  )

function btcToSatoshis(value: number): bigint {
  return BigInt(Math.round(value * 100_000_000))
}