dupPosition()

Try it Live

Run Opcode examples in the interactive playground

Opcode.dupPosition()

Get stack position duplicated by DUP opcode (1-16).

Functional API

import { dupPosition, DUP1, DUP16 } from 'tevm/Opcode'

dupPosition(DUP1)   // 1
dupPosition(DUP16)  // 16

Parameters

opcode: BrandedOpcode - Opcode to check

Returns

number | undefined - Position (1-16) or undefined if not DUP

Stack Semantics

DUP1:  [..., a] → [..., a, a]           (duplicate top)
DUP2:  [..., b, a] → [..., b, a, b]     (duplicate 2nd)
DUP16: [..., p, ..., a] → [..., p, ..., a, p]  (duplicate 16th)

isDup() - Check if DUP opcode

Overview

Getting Started

Core Concepts

Skills

JSONRPCProvider

Contract

Primitives

Cryptography

EVM

Utils

Guides

Examples

Swift

Zig

Developer Documentation

Generated API (TypeDoc)

Try it Live

Opcode.dupPosition()

Parameters

Returns

Stack Semantics

Try it Live

​Opcode.dupPosition()

​Parameters

​Returns

​Stack Semantics

​Related

Opcode.dupPosition()

Parameters

Returns

Stack Semantics

Related