58 lines
1.9 KiB
Go
58 lines
1.9 KiB
Go
package lbrycrd
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import (
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"encoding/hex"
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"github.com/lbryio/lbry.go/extras/errors"
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"github.com/btcsuite/btcd/chaincfg"
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"github.com/btcsuite/btcutil"
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"github.com/btcsuite/btcutil/base58"
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"golang.org/x/crypto/ripemd160"
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)
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// DecodeAddress decodes the string encoding of an address and returns
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// the Address if addr is a valid encoding for a known address type.
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//
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// The bitcoin network the address is associated with is extracted if possible.
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// When the address does not encode the network, such as in the case of a raw
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// public key, the address will be associated with the passed defaultNet.
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func DecodeAddress(addr string, defaultNet *chaincfg.Params) (btcutil.Address, error) {
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// Serialized public keys are either 65 bytes (130 hex chars) if
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// uncompressed/hybrid or 33 bytes (66 hex chars) if compressed.
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if len(addr) == 130 || len(addr) == 66 {
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serializedPubKey, err := hex.DecodeString(addr)
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if err != nil {
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return nil, err
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}
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return btcutil.NewAddressPubKey(serializedPubKey, defaultNet)
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}
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// Switch on decoded length to determine the type.
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decoded, netID, err := base58.CheckDecode(addr)
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if err != nil {
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if err == base58.ErrChecksum {
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return nil, btcutil.ErrChecksumMismatch
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}
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return nil, errors.Err("decoded address[%s] is of unknown format even with default chainparams[%s]", addr, defaultNet.Name)
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}
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switch len(decoded) {
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case ripemd160.Size: // P2PKH or P2SH
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isP2PKH := chaincfg.IsPubKeyHashAddrID(netID)
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isP2SH := chaincfg.IsScriptHashAddrID(netID)
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switch hash160 := decoded; {
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case isP2PKH && isP2SH:
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return nil, btcutil.ErrAddressCollision
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case isP2PKH:
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return btcutil.NewAddressPubKeyHash(hash160, &chaincfg.Params{PubKeyHashAddrID: netID})
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case isP2SH:
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return btcutil.NewAddressScriptHashFromHash(hash160, &chaincfg.Params{ScriptHashAddrID: netID})
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default:
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return nil, btcutil.ErrUnknownAddressType
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}
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default:
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return nil, errors.Err("decoded address is of unknown size")
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}
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}
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