114 lines
4.0 KiB
Go
114 lines
4.0 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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l := 1 + len(grantee) + len(granter) + len(m)
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var key = make([]byte, l)
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copy(key, GrantKey)
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copy(key[1:], granter)
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copy(key[1+len(granter):], grantee)
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copy(key[l-len(m):], m)
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// fmt.Println(">>>> len", l, key)
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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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kv.AssertKeyAtLeastLength(key, 2)
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granterAddrLen := key[1] // remove prefix key
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kv.AssertKeyAtLeastLength(key, int(3+granterAddrLen))
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granterAddr = sdk.AccAddress(key[2 : 2+granterAddrLen])
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granteeAddrLen := int(key[2+granterAddrLen])
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kv.AssertKeyAtLeastLength(key, 4+int(granterAddrLen+byte(granteeAddrLen)))
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granteeAddr = sdk.AccAddress(key[3+granterAddrLen : 3+granterAddrLen+byte(granteeAddrLen)])
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return granterAddr, granteeAddr, conv.UnsafeBytesToStr(key[3+granterAddrLen+byte(granteeAddrLen):])
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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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kv.AssertKeyAtLeastLength(key, 1+lenTime)
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exp, err := sdk.ParseTimeBytes(key[1 : 1+lenTime])
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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 := key[1+lenTime]
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kv.AssertKeyAtLeastLength(key, 1+lenTime+int(granterAddrLen))
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granter := sdk.AccAddress(key[2+lenTime : byte(2+lenTime)+granterAddrLen])
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granteeAddrLen := key[byte(2+lenTime)+granterAddrLen]
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granteeStart := byte(3+lenTime) + granterAddrLen
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kv.AssertKeyAtLeastLength(key, int(granteeStart))
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grantee := sdk.AccAddress(key[granteeStart : granteeStart+granteeAddrLen])
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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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l := 1 + len(exp) + len(granter) + len(grantee)
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var key = make([]byte, l)
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copy(key, GrantQueuePrefix)
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copy(key[1:], exp)
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copy(key[1+len(exp):], granter)
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copy(key[1+len(exp)+len(granter):], grantee)
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return key
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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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