100 lines
3.9 KiB
Go
100 lines
3.9 KiB
Go
package keeper
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import (
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"time"
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"github.com/cosmos/cosmos-sdk/internal/conv"
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sdk "github.com/cosmos/cosmos-sdk/types"
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"github.com/cosmos/cosmos-sdk/types/address"
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"github.com/cosmos/cosmos-sdk/types/kv"
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"github.com/cosmos/cosmos-sdk/x/authz"
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)
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// Keys for store prefixes
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// Items are stored with the following key: values
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//
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// - 0x01<grant_Bytes>: Grant
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// - 0x02<grant_expiration_Bytes>: GrantQueueItem
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//
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var (
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GrantKey = []byte{0x01} // prefix for each key
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GrantQueuePrefix = []byte{0x02}
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)
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var lenTime = len(sdk.FormatTimeBytes(time.Now()))
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// StoreKey is the store key string for authz
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const StoreKey = authz.ModuleName
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// grantStoreKey - return authorization store key
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// Items are stored with the following key: values
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//
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// - 0x01<granterAddressLen (1 Byte)><granterAddress_Bytes><granteeAddressLen (1 Byte)><granteeAddress_Bytes><msgType_Bytes>: Grant
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func grantStoreKey(grantee sdk.AccAddress, granter sdk.AccAddress, msgType string) []byte {
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m := conv.UnsafeStrToBytes(msgType)
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granter = address.MustLengthPrefix(granter)
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grantee = address.MustLengthPrefix(grantee)
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key := sdk.AppendLengthPrefixedBytes(GrantKey, granter, grantee, m)
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return key
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}
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// parseGrantStoreKey - split granter, grantee address and msg type from the authorization key
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func parseGrantStoreKey(key []byte) (granterAddr, granteeAddr sdk.AccAddress, msgType string) {
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// key is of format:
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// 0x01<granterAddressLen (1 Byte)><granterAddress_Bytes><granteeAddressLen (1 Byte)><granteeAddress_Bytes><msgType_Bytes>
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granterAddrLen, granterAddrLenEndIndex := sdk.ParseLengthPrefixedBytes(key, 1, 1) // ignore key[0] since it is a prefix key
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granterAddr, granterAddrEndIndex := sdk.ParseLengthPrefixedBytes(key, granterAddrLenEndIndex+1, int(granterAddrLen[0]))
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granteeAddrLen, granteeAddrLenEndIndex := sdk.ParseLengthPrefixedBytes(key, granterAddrEndIndex+1, 1)
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granteeAddr, granteeAddrEndIndex := sdk.ParseLengthPrefixedBytes(key, granteeAddrLenEndIndex+1, int(granteeAddrLen[0]))
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kv.AssertKeyAtLeastLength(key, granteeAddrEndIndex+1)
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return granterAddr, granteeAddr, conv.UnsafeBytesToStr(key[(granteeAddrEndIndex + 1):])
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}
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// parseGrantQueueKey split expiration time, granter and grantee from the grant queue key
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func parseGrantQueueKey(key []byte) (time.Time, sdk.AccAddress, sdk.AccAddress, error) {
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// key is of format:
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// 0x02<grant_expiration_Bytes><granterAddress_Bytes><granteeAddressLen (1 Byte)><granteeAddress_Bytes>
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expBytes, expEndIndex := sdk.ParseLengthPrefixedBytes(key, 1, lenTime)
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exp, err := sdk.ParseTimeBytes(expBytes)
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if err != nil {
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return exp, nil, nil, err
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}
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granterAddrLen, granterAddrLenEndIndex := sdk.ParseLengthPrefixedBytes(key, expEndIndex+1, 1)
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granter, granterEndIndex := sdk.ParseLengthPrefixedBytes(key, granterAddrLenEndIndex+1, int(granterAddrLen[0]))
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granteeAddrLen, granteeAddrLenEndIndex := sdk.ParseLengthPrefixedBytes(key, granterEndIndex+1, 1)
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grantee, _ := sdk.ParseLengthPrefixedBytes(key, granteeAddrLenEndIndex+1, int(granteeAddrLen[0]))
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return exp, granter, grantee, nil
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}
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// GrantQueueKey - return grant queue store key. If a given grant doesn't have a defined
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// expiration, then it should not be used in the pruning queue.
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// Key format is:
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// 0x02<grant_expiration_Bytes>: GrantQueueItem
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func GrantQueueKey(expiration time.Time, granter sdk.AccAddress, grantee sdk.AccAddress) []byte {
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exp := sdk.FormatTimeBytes(expiration)
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granter = address.MustLengthPrefix(granter)
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grantee = address.MustLengthPrefix(grantee)
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return sdk.AppendLengthPrefixedBytes(GrantQueuePrefix, exp, granter, grantee)
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}
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// GrantQueueTimePrefix - return grant queue time prefix
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func GrantQueueTimePrefix(expiration time.Time) []byte {
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return append(GrantQueuePrefix, sdk.FormatTimeBytes(expiration)...)
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}
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// firstAddressFromGrantStoreKey parses the first address only
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func firstAddressFromGrantStoreKey(key []byte) sdk.AccAddress {
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addrLen := key[0]
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return sdk.AccAddress(key[1 : 1+addrLen])
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}
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