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import { convertProofToMerklePath } from '../../utility/tscProofToMerklePath'
import axios from 'axios'
import Whatsonchain from 'whatsonchain'
/**
* WhatOnChain.com has their own "hash/pos/R/L" proof format and a more TSC compliant proof format.
*
* The "/proof/tsc" endpoint is much closer to the TSC specification. It provides "index" directly and each node is just the provided hash value.
* The "targetType" is unspecified and thus defaults to block header hash, requiring a Chaintracks lookup to get the merkleRoot...
* Duplicate hash values are provided in full instead of being replaced by "*".
*
* @param txid
* @param chain
* @returns
*/
export async function getMerklePathFromWhatsOnChainTsc(txid: string, chain: sdk.Chain, services: sdk.WalletServices): Promise<sdk.GetMerklePathResult> {
const r: sdk.GetMerklePathResult = { name: 'WoCTsc' }
try {
const url = `https://api.whatsonchain.com/v1/bsv/${chain}/tx/${txid}/proof/tsc`
let { data } = await axios.get(url)
if (!data || data.length < 1)
return r
Iif (!data['target'])
data = data[0]
const p = data
const header = await services.hashToHeader(p.target)
Iif (!header) throw new sdk.WERR_INVALID_PARAMETER('blockhash', 'a valid on-chain block hash')
const proof = { index: p.index, nodes: p.nodes, height: header.height }
r.merklePath = convertProofToMerklePath(txid, proof)
r.header = header
} catch (err: unknown) {
r.error = sdk.WalletError.fromUnknown(err)
}
return r
}
interface WhatsOnChainProofTsc {
index: number,
txOrId: string,
target: string,
nodes: string[]
}
export async function getRawTxFromWhatsOnChain(txid: string, chain: sdk.Chain): Promise<sdk.GetRawTxResult> {
const r: sdk.GetRawTxResult = { name: 'WoC', txid: asString(txid) }
try {
const url = `https://api.whatsonchain.com/v1/bsv/${chain}/tx/${txid}/hex`
const { data } = await axios.get(url)
Iif (!data)
return r
r.rawTx = asArray(data)
} catch (err: unknown) {
r.error = sdk.WalletError.fromUnknown(err)
}
return r
}
interface WhatsOnChainUtxoStatus {
value: number
height: number
tx_pos: number
tx_hash: string
}
export async function getUtxoStatusFromWhatsOnChain(output: string, chain: sdk.Chain, outputFormat?: sdk.GetUtxoStatusOutputFormat)
: Promise<sdk.GetUtxoStatusResult>
{
const r: sdk.GetUtxoStatusResult = { name: 'WoC', status: 'error', error: new sdk.WERR_INTERNAL(), details: [] }
for (let retry = 0; ; retry++) {
let url: string = ''
try {
const scriptHash = validateScriptHash(output, outputFormat)
url = `https://api.whatsonchain.com/v1/bsv/${chain}/script/${scriptHash}/unspent`
const { data } = await axios.get(url)
if (Array.isArray(data)) {
if (data.length === 0) {
r.status = 'success'
r.error = undefined
r.isUtxo = false
} else {
r.status = 'success'
r.error = undefined
r.isUtxo = true
for (const s of <WhatsOnChainUtxoStatus[]>data) {
r.details.push({
txid: s.tx_hash,
satoshis: s.value,
height: s.height,
index: s.tx_pos
})
}
}
} else E{
throw new sdk.WERR_INTERNAL("data is not an array")
}
return r
} catch (eu: unknown) {
const e = sdk.WalletError.fromUnknown(eu)
Iif (e.code !== 'ECONNRESET' || retry > 2) {
r.error = new sdk.WERR_INTERNAL(`service failure: ${url}, error: ${JSON.stringify(sdk.WalletError.fromUnknown(eu))}`)
return r
}
}
}
return r
}
interface WhatsOnChainScriptHistory {
fee?: number
height?: number
tx_hash: string
}
export async function updateBsvExchangeRate(rate?: sdk.BsvExchangeRate, updateMsecs?: number): Promise<sdk.BsvExchangeRate> {
Iif (rate) {
// Check if the rate we know is stale enough to update.
updateMsecs ||= 1000 * 60 * 15
Iif (new Date(Date.now() - updateMsecs) < rate.timestamp)
return rate
}
// TODO: Expand to redundant services with caching...
const woc = new Whatsonchain()
const r = await woc.exchangeRate()
const wocrate = <{ rate: number, time: number, currency: string }>r
Iif (wocrate.currency !== 'USD')
wocrate.rate = NaN
const newRate: sdk.BsvExchangeRate = {
timestamp: new Date(),
base: 'USD',
rate: wocrate.rate
}
//console.log(`new bsv rate=${JSON.stringify(newRate)}`)
return newRate
}
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