72 lines
1.7 KiB
Go
72 lines
1.7 KiB
Go
package roles
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import (
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"github.com/tendermint/basecoin"
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"github.com/tendermint/basecoin/errors"
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"github.com/tendermint/basecoin/state"
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)
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const (
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//NameRole - name space of the roles module
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NameRole = "role"
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// CostCreate is the cost to create a new role
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CostCreate = uint64(40)
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// CostAssume is the cost to assume a role as part of a tx
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CostAssume = uint64(5)
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)
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// Handler allows us to create new roles
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type Handler struct {
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basecoin.NopInitState
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basecoin.NopInitValidate
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}
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var _ basecoin.Handler = Handler{}
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// NewHandler makes a role handler to create roles
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func NewHandler() Handler {
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return Handler{}
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}
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// Name - return name space
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func (Handler) Name() string {
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return NameRole
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}
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// CheckTx verifies if the transaction is properly formated
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func (h Handler) CheckTx(ctx basecoin.Context, store state.SimpleDB, tx basecoin.Tx) (res basecoin.CheckResult, err error) {
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var cr CreateRoleTx
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cr, err = checkTx(ctx, tx)
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if err != nil {
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return
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}
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res = basecoin.NewCheck(CostCreate, "")
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err = checkNoRole(store, cr.Role)
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return
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}
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// DeliverTx tries to create a new role.
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//
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// Returns an error if the role already exists
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func (h Handler) DeliverTx(ctx basecoin.Context, store state.SimpleDB, tx basecoin.Tx) (res basecoin.DeliverResult, err error) {
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create, err := checkTx(ctx, tx)
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if err != nil {
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return res, err
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}
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// lets try...
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role := NewRole(create.MinSigs, create.Signers)
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err = createRole(store, create.Role, role)
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return res, err
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}
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func checkTx(ctx basecoin.Context, tx basecoin.Tx) (create CreateRoleTx, err error) {
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// check if the tx is proper type and valid
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create, ok := tx.Unwrap().(CreateRoleTx)
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if !ok {
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return create, errors.ErrInvalidFormat(TypeCreateRoleTx, tx)
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}
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err = create.ValidateBasic()
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return create, err
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}
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