87 lines
2.1 KiB
Go
87 lines
2.1 KiB
Go
package webapi
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import (
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"encoding/hex"
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"errors"
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"fmt"
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"github.com/decred/dcrd/blockchain/stake/v3"
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"github.com/decred/dcrd/chaincfg/v3"
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"github.com/decred/dcrd/dcrutil/v3"
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"github.com/decred/dcrd/wire"
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"github.com/gin-gonic/gin"
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)
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func currentVoteVersion(params *chaincfg.Params) uint32 {
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var latestVersion uint32
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for version := range params.Deployments {
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if latestVersion < version {
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latestVersion = version
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}
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}
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return latestVersion
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}
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// isValidVoteChoices returns an error if provided vote choices are not valid for
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// the most recent agendas.
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func isValidVoteChoices(params *chaincfg.Params, voteVersion uint32, voteChoices map[string]string) error {
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agendaLoop:
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for agenda, choice := range voteChoices {
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// Does the agenda exist?
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for _, v := range params.Deployments[voteVersion] {
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if v.Vote.Id == agenda {
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// Agenda exists - does the vote choice exist?
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for _, c := range v.Vote.Choices {
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if c.Id == choice {
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// Valid agenda and choice combo! Check the next one...
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continue agendaLoop
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}
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}
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return fmt.Errorf("choice %q not found for agenda %q", choice, agenda)
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}
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}
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return fmt.Errorf("agenda %q not found for vote version %d", agenda, voteVersion)
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}
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return nil
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}
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func validateSignature(reqBytes []byte, commitmentAddress string, c *gin.Context) error {
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// Ensure a signature is provided.
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signature := c.GetHeader("VSP-Client-Signature")
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if signature == "" {
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return errors.New("no VSP-Client-Signature header")
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}
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err := dcrutil.VerifyMessage(commitmentAddress, signature, string(reqBytes), cfg.NetParams)
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if err != nil {
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return err
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}
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return nil
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}
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func decodeTransaction(txHex string) (*wire.MsgTx, error) {
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msgHex, err := hex.DecodeString(txHex)
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if err != nil {
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return nil, err
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}
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msgTx := wire.NewMsgTx()
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if err = msgTx.FromBytes(msgHex); err != nil {
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return nil, err
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}
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return msgTx, nil
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}
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func isValidTicket(tx *wire.MsgTx) error {
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if !stake.IsSStx(tx) {
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return errors.New("invalid transaction - not sstx")
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}
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if len(tx.TxOut) != 3 {
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return fmt.Errorf("invalid transaction - expected 3 outputs, got %d", len(tx.TxOut))
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}
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return nil
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}
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