toCoinType

Converts a chain ID to an ENSIP-9 compliant coin type.

Import

import "github.com/ChefBingbong/viem-go/utils/ens"

Usage

import "github.com/ChefBingbong/viem-go/utils/ens"

// Ethereum mainnet (chainId 1) uses SLIP-44 coin type 60
coinType, err := ens.ToCoinType(1)
if err != nil {
  log.Fatal(err)
}
// 60

// Optimism (chainId 10)
coinType, _ = ens.ToCoinType(10)
// 2147483658

// Polygon (chainId 137)
coinType, _ = ens.ToCoinType(137)
// 2147483785

// Panic on error
coinType = ens.MustToCoinType(1)
// 60

Returns

• Type: (uint64, error) for ToCoinType, uint64 for MustToCoinType

The coin type for the chain ID.

Parameters

chainId (required)

• Type: int

The chain ID to convert. Must be >= 0 and < 0x80000000.

coinType, _ := ens.ToCoinType(1)
// 60

coinType, _ = ens.ToCoinType(10)
// 2147483658

Conversion Rules

1. Ethereum Mainnet (chainId 1): Returns 60 (ETH's SLIP-44 coin type)
2. Other Chains: Applies ENSIP-9 formula: 0x80000000 | chainId

Functions

ToCoinType

Converts chain ID to coin type:

coinType, _ := ens.ToCoinType(1)

MustToCoinType

Converts chain ID to coin type or panics:

coinType := ens.MustToCoinType(1)

Notes

• Ethereum mainnet (chainId 1) uses SLIP-44 coin type 60
• Other chains use the ENSIP-9 formula: 0x80000000 | chainId
• Chain ID must be >= 0 and < 0x80000000
• Used in ENS address resolution for multi-chain addresses