80 lines
2.4 KiB
Go
80 lines
2.4 KiB
Go
package host
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import (
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"strconv"
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"strings"
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sdkerrors "github.com/cosmos/cosmos-sdk/types/errors"
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)
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// ParseIdentifier parses the sequence from the identifier using the provided prefix. This function
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// does not need to be used by counterparty chains. SDK generated connection and channel identifiers
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// are required to use this format.
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func ParseIdentifier(identifier, prefix string) (uint64, error) {
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if !strings.HasPrefix(identifier, prefix) {
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return 0, sdkerrors.Wrapf(ErrInvalidID, "identifier doesn't contain prefix `%s`", prefix)
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}
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splitStr := strings.Split(identifier, prefix)
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if len(splitStr) != 2 {
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return 0, sdkerrors.Wrapf(ErrInvalidID, "identifier must be in format: `%s{N}`", prefix)
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}
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// sanity check
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if splitStr[0] != "" {
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return 0, sdkerrors.Wrapf(ErrInvalidID, "identifier must begin with prefix %s", prefix)
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}
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sequence, err := strconv.ParseUint(splitStr[1], 10, 64)
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if err != nil {
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return 0, sdkerrors.Wrap(err, "failed to parse identifier sequence")
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}
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return sequence, nil
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}
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// ParseConnectionPath returns the connection ID from a full path. It returns
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// an error if the provided path is invalid.
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func ParseConnectionPath(path string) (string, error) {
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split := strings.Split(path, "/")
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if len(split) != 2 {
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return "", sdkerrors.Wrapf(ErrInvalidPath, "cannot parse connection path %s", path)
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}
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return split[1], nil
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}
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// ParseChannelPath returns the port and channel ID from a full path. It returns
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// an error if the provided path is invalid.
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func ParseChannelPath(path string) (string, string, error) {
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split := strings.Split(path, "/")
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if len(split) < 5 {
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return "", "", sdkerrors.Wrapf(ErrInvalidPath, "cannot parse channel path %s", path)
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}
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if split[1] != KeyPortPrefix || split[3] != KeyChannelPrefix {
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return "", "", sdkerrors.Wrapf(ErrInvalidPath, "cannot parse channel path %s", path)
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}
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return split[2], split[4], nil
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}
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// MustParseConnectionPath returns the connection ID from a full path. Panics
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// if the provided path is invalid.
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func MustParseConnectionPath(path string) string {
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connectionID, err := ParseConnectionPath(path)
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if err != nil {
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panic(err)
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}
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return connectionID
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}
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// MustParseChannelPath returns the port and channel ID from a full path. Panics
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// if the provided path is invalid.
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func MustParseChannelPath(path string) (string, string) {
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portID, channelID, err := ParseChannelPath(path)
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if err != nil {
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panic(err)
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}
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return portID, channelID
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}
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