### Install gqlgen-scalars

Source: https://github.com/jilio/gqlgen-scalars/blob/main/README.md

Installs the gqlgen-scalars package using the go get command.

```bash
go get github.com/jilio/gqlgen-scalars
```

--------------------------------

### GraphQL Query Examples

Source: https://github.com/jilio/gqlgen-scalars/blob/main/README.md

Demonstrates how to query data using the custom scalar types (Base64, BigInt, Decimal, Address) in GraphQL.

```graphql
query {
  getBase64Data
  getLargeNumber
  getPreciseDecimal
  getEthereumAddress
}
```

--------------------------------

### GraphQL Mutation Examples

Source: https://github.com/jilio/gqlgen-scalars/blob/main/README.md

Shows how to use mutations with custom scalar types (Base64, BigInt, Decimal, Address) in GraphQL.

```graphql
mutation {
  uploadBase64Data(data: "SGVsbG8gV29ybGQ=")
  setLargeNumber(number: "123456789012345678901234567890")
  setPreciseDecimal(value: "123.45000000000000000001")
  setEthereumAddress(address: "0x742d35Cc6634C0532925a3b844Bc454e4438f44e")
}
```

--------------------------------

### Go Resolver Implementations

Source: https://github.com/jilio/gqlgen-scalars/blob/main/README.md

Provides Go implementations for custom scalar types (Base64, BigInt, Decimal, Address) used in gqlgen resolvers.

```go
import (
	"math/big"
	"github.com/shopspring/decimal"
	"github.com/ethereum/go-ethereum/common"
	"github.com/jilio/gqlgen-scalars/scalar"
)

type Resolver struct{}

func (r *Resolver) Base64() scalar.Base64 {
	return scalar.Base64("SGVsbG8gV29ybGQ=")
}

func (r *Resolver) BigInt() scalar.BigInt {
	return scalar.BigInt{big.NewInt(123456789012345678901234567890)}
}

func (r *Resolver) Decimal() scalar.Decimal {
	return scalar.NewDecimal(decimal.NewFromFloat(123.45))
}

func (r *Resolver) Address() scalar.Address {
	return scalar.Address(common.HexToAddress("0x742d35Cc6634C0532925a3b844Bc454e4438f44e"))
}
```

--------------------------------

### gqlgen.yml Configuration

Source: https://github.com/jilio/gqlgen-scalars/blob/main/README.md

Configures gqlgen to map GraphQL scalar types to Go models provided by the gqlgen-scalars package.

```yaml
models:
  Base64:
    model: github.com/jilio/gqlgen-scalars/scalar.Base64
  BigInt:
    model: github.com/jilio/gqlgen-scalars/scalar.BigInt
  Decimal:
    model: github.com/jilio/gqlgen-scalars/scalar.Decimal
  Address:
    model: github.com/jilio/gqlgen-scalars/scalar.Address
```

--------------------------------

### GraphQL Schema Definition

Source: https://github.com/jilio/gqlgen-scalars/blob/main/README.md

Defines custom scalar types (Base64, BigInt, Decimal, Address) in a GraphQL schema.

```graphql
scalar Base64
scalar BigInt
scalar Decimal
scalar Address
```

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