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core: add System.Blockchain.GetTransactionFromBlock interop

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This commit is contained in:
Anna Shaleva 2020-06-09 12:18:08 +03:00
parent 1e63ae4b3f
commit d692de5ea4
6 changed files with 103 additions and 9 deletions
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21
pkg/core/interop_system.go
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@ -148,6 +148,27 @@ func bcGetTransaction(ic *interop.Context, v *vm.VM) error {
return nil
}
// bcGetTransactionFromBlock returns transaction with the given index from the
// block with height or hash specified.
func bcGetTransactionFromBlock(ic *interop.Context, v *vm.VM) error {
hash, err := getBlockHashFromElement(ic.Chain, v.Estack().Pop())
if err != nil {
return err
}
block, err := ic.DAO.GetBlock(hash)
if err != nil || !isTraceableBlock(ic, block.Index) {
v.Estack().PushVal(stackitem.Null{})
return nil
}
index := v.Estack().Pop().BigInt().Int64()
if index < 0 || index >= int64(len(block.Transactions)) {
return errors.New("wrong transaction index")
}
tx := block.Transactions[index]
v.Estack().PushVal(tx.Hash().BytesBE())
return nil
}
// bcGetTransactionHeight returns transaction height.
func bcGetTransactionHeight(ic *interop.Context, v *vm.VM) error {
_, h, err := getTransactionAndHeight(ic.DAO, v)