Steven Polley
e9466bebc5
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continuous-integration/drone/push Build is passing
67 lines
1.8 KiB
Go
67 lines
1.8 KiB
Go
package bitcoinElectrum
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import (
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"fmt"
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"os"
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"github.com/btcsuite/btcd/btcutil/hdkeychain"
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)
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type Provider struct {
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masterKey *hdkeychain.ExtendedKey
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ynabAccountID string // YNAB account ID this provider updates - all bitcoin addresses are summed up and mapped to this YNAB account
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spvServer string
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gapLimit int
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coinGeckoApiKey string
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}
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func (p *Provider) Name() string {
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return "Bitcoin - Electrum SPV"
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}
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func (p *Provider) Configure() error {
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var err error
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zpub := os.Getenv("bitcoin_zpub")
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p.ynabAccountID = os.Getenv("bitcoin_ynab_account")
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p.spvServer = os.Getenv("bitcoin_spv_server")
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p.coinGeckoApiKey = os.Getenv("bitcoin_coingecko_api_key")
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p.gapLimit = 10
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if zpub == "" || p.ynabAccountID == "" || p.spvServer == "" || p.coinGeckoApiKey == "" {
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return fmt.Errorf("this account provider is not configured")
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}
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p.masterKey, err = hdkeychain.NewKeyFromString(zpub)
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if err != nil {
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return fmt.Errorf("failed to obtain master key from zpub: %v", err)
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}
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return nil
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}
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// Returns slices of account balances and mapped YNAB account IDs, along with an error
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func (p *Provider) GetBalances() ([]int, []string, error) {
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var totalSats int64
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// branch 0 = regular
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// branch 1 = change addresses
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for _, branch := range []uint32{0, 1} {
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branchSats, err := scanBranch(p.masterKey, branch, p.gapLimit, p.spvServer)
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if err != nil {
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return nil, nil, fmt.Errorf("failed to scan branch '%v': %v", branch, err)
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}
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totalSats += branchSats
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}
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cad, err := convertBTCToCAD(totalSats, p.coinGeckoApiKey)
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if err != nil {
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return nil, nil, fmt.Errorf("failed to convert sats to CAD: %v", err)
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}
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balances := make([]int, 0)
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accounts := make([]string, 0)
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balances = append(balances, int(cad))
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accounts = append(accounts, p.ynabAccountID)
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return balances, accounts, nil
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}
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