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Implement Basic GetLatestValue for Solana
This commit fills in the functionality for `GetLatestValue` such that one or more accounts with an associated Anchor IDl can be read and mapped to native Go structs. Methods and prodecures can be defined in a config where an IDL and codec modifiers can be provided. Current limitations include completing enums and defining max length of strings.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,47 @@ | ||
| package solana | ||
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| import ( | ||
| "context" | ||
| "fmt" | ||
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| "github.com/gagliardetto/solana-go" | ||
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| commontypes "github.com/smartcontractkit/chainlink-common/pkg/types" | ||
| ) | ||
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| // BinaryDataReader provides an interface for reading bytes from a source. This is likely a wrapper | ||
| // for a solana client. | ||
| type BinaryDataReader interface { | ||
| ReadAll(context.Context, solana.PublicKey) ([]byte, error) | ||
| } | ||
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| // accountReadBinding provides decoding and reading Solana Account data using a defined codec. The | ||
| // `idlAccount` refers to the account name in the IDL for which the codec has a type mapping. | ||
| type accountReadBinding struct { | ||
| idlAccount string | ||
| account solana.PublicKey | ||
| codec commontypes.Codec | ||
| reader BinaryDataReader | ||
| } | ||
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| var _ readBinding = &accountReadBinding{} | ||
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| func (b *accountReadBinding) GetLatestValue(ctx context.Context, _ any, outVal any) error { | ||
| bts, err := b.reader.ReadAll(ctx, b.account) | ||
| if err != nil { | ||
| return fmt.Errorf("%w: failed to get binary data", err) | ||
| } | ||
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| return b.codec.Decode(ctx, bts, outVal, b.idlAccount) | ||
| } | ||
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| func (b *accountReadBinding) Bind(contract commontypes.BoundContract) error { | ||
| account, err := solana.PublicKeyFromBase58(contract.Address) | ||
| if err != nil { | ||
| return err | ||
| } | ||
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| b.account = account | ||
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| return nil | ||
| } |
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