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common package

Overview

Package common provides shared realm utilities for GnoSwap protocol contracts.

The package contains helpers that must keep a realm boundary, including GRC20 token operations and native coin validation. AMM math lives in gno.land/p/gnoswap/gnsmath/v1.

Key components: - GRC20 Registry Helpers: convenient wrappers for GRC20 token operations - Coin Utilities: native coin handling and validation - Assertion Utilities: input validation for supported operations, including native-coin rejection

Function

Approve

func Approve(_ int, rlm realm, tokenKey string, spender address, amount int64) error

Approve forwards an allowance update to the implementation bound to the current realm.

Parameters:

  • _: leading integer discriminator for the realm-crossing ABI; pass 0.
  • rlm: propagated realm context used to resolve and invoke the registered token implementation.
  • tokenKey: registry key identifying the GRC20 token.
  • spender: address authorized to spend the caller's tokens.
  • amount: number of token base units to authorize.

Returns:

  • error: nil when the implementation records the allowance; otherwise a token validation or approval-rule error.

Params

Command

gnokey query vm/qeval -remote "http://127.0.0.1:26657" -data "gno.land/r/gnoswap/common.Approve(,,,,)"

Result